gstreamer/gst/avi/gstavidemux.c
Wim Taymans 0c12f585e3 avidemux: use segment_full when we can
Use segment_full so that we can pass the applied rate to the segment values. We
will change the applied rate when we implement skip mode.
2009-10-27 18:07:18 +01:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@temple-baptist.com>
* Copyright (C) <2006> Nokia Corporation (contact <stefan.kost@nokia.com>)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Element-Checklist-Version: 5 */
/**
* SECTION:element-avidemux
*
* Demuxes an .avi file into raw or compressed audio and/or video streams.
*
* This element supports both push and pull-based scheduling, depending on the
* capabilities of the upstream elements.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch filesrc location=test.avi ! avidemux name=demux demux.audio_00 ! decodebin ! audioconvert ! audioresample ! autoaudiosink demux.video_00 ! queue ! decodebin ! ffmpegcolorspace ! videoscale ! autovideosink
* ]| Play (parse and decode) an .avi file and try to output it to
* an automatically detected soundcard and videosink. If the AVI file contains
* compressed audio or video data, this will only work if you have the
* right decoder elements/plugins installed.
* </refsect2>
*
* Last reviewed on 2006-12-29 (0.10.6)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gst/riff/riff-media.h"
#include "gstavidemux.h"
#include "avi-ids.h"
#include <gst/gst-i18n-plugin.h>
#include <gst/base/gstadapter.h>
#define DIV_ROUND_UP(s,v) (((s) + ((v)-1)) / (v))
GST_DEBUG_CATEGORY_STATIC (avidemux_debug);
#define GST_CAT_DEFAULT avidemux_debug
static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-msvideo")
);
static void gst_avi_demux_base_init (GstAviDemuxClass * klass);
static void gst_avi_demux_class_init (GstAviDemuxClass * klass);
static void gst_avi_demux_init (GstAviDemux * avi);
static void gst_avi_demux_finalize (GObject * object);
static void gst_avi_demux_reset (GstAviDemux * avi);
#if 0
static const GstEventMask *gst_avi_demux_get_event_mask (GstPad * pad);
#endif
static gboolean gst_avi_demux_handle_src_event (GstPad * pad, GstEvent * event);
static gboolean gst_avi_demux_handle_sink_event (GstPad * pad,
GstEvent * event);
static gboolean gst_avi_demux_push_event (GstAviDemux * avi, GstEvent * event);
#if 0
static const GstFormat *gst_avi_demux_get_src_formats (GstPad * pad);
#endif
static const GstQueryType *gst_avi_demux_get_src_query_types (GstPad * pad);
static gboolean gst_avi_demux_handle_src_query (GstPad * pad, GstQuery * query);
static gboolean gst_avi_demux_src_convert (GstPad * pad, GstFormat src_format,
gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
static gboolean gst_avi_demux_do_seek (GstAviDemux * avi, GstSegment * segment);
static gboolean gst_avi_demux_handle_seek (GstAviDemux * avi, GstPad * pad,
GstEvent * event);
static gboolean gst_avi_demux_handle_seek_push (GstAviDemux * avi, GstPad * pad,
GstEvent * event);
static void gst_avi_demux_loop (GstPad * pad);
static gboolean gst_avi_demux_sink_activate (GstPad * sinkpad);
static gboolean gst_avi_demux_sink_activate_pull (GstPad * sinkpad,
gboolean active);
static gboolean gst_avi_demux_activate_push (GstPad * pad, gboolean active);
static GstFlowReturn gst_avi_demux_chain (GstPad * pad, GstBuffer * buf);
static void gst_avi_demux_set_index (GstElement * element, GstIndex * index);
static GstIndex *gst_avi_demux_get_index (GstElement * element);
static GstStateChangeReturn gst_avi_demux_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class = NULL;
/* GObject methods */
GType
gst_avi_demux_get_type (void)
{
static GType avi_demux_type = 0;
if (!avi_demux_type) {
static const GTypeInfo avi_demux_info = {
sizeof (GstAviDemuxClass),
(GBaseInitFunc) gst_avi_demux_base_init,
NULL,
(GClassInitFunc) gst_avi_demux_class_init,
NULL,
NULL,
sizeof (GstAviDemux),
0,
(GInstanceInitFunc) gst_avi_demux_init,
};
avi_demux_type =
g_type_register_static (GST_TYPE_ELEMENT,
"GstAviDemux", &avi_demux_info, 0);
}
return avi_demux_type;
}
static void
gst_avi_demux_base_init (GstAviDemuxClass * klass)
{
static const GstElementDetails gst_avi_demux_details =
GST_ELEMENT_DETAILS ("Avi demuxer",
"Codec/Demuxer",
"Demultiplex an avi file into audio and video",
"Erik Walthinsen <omega@cse.ogi.edu>\n"
"Wim Taymans <wim.taymans@chello.be>\n"
"Thijs Vermeir <thijsvermeir@gmail.com>");
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstPadTemplate *videosrctempl, *audiosrctempl, *subsrctempl;
GstCaps *audcaps, *vidcaps, *subcaps;
audcaps = gst_riff_create_audio_template_caps ();
gst_caps_append (audcaps, gst_caps_new_simple ("audio/x-avi-unknown", NULL));
audiosrctempl = gst_pad_template_new ("audio_%02d",
GST_PAD_SRC, GST_PAD_SOMETIMES, audcaps);
vidcaps = gst_riff_create_video_template_caps ();
gst_caps_append (vidcaps, gst_riff_create_iavs_template_caps ());
gst_caps_append (vidcaps, gst_caps_new_simple ("video/x-avi-unknown", NULL));
videosrctempl = gst_pad_template_new ("video_%02d",
GST_PAD_SRC, GST_PAD_SOMETIMES, vidcaps);
subcaps = gst_caps_new_simple ("application/x-subtitle-avi", NULL);
subsrctempl = gst_pad_template_new ("subtitle_%02d",
GST_PAD_SRC, GST_PAD_SOMETIMES, subcaps);
gst_element_class_add_pad_template (element_class, audiosrctempl);
gst_element_class_add_pad_template (element_class, videosrctempl);
gst_element_class_add_pad_template (element_class, subsrctempl);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_templ));
gst_element_class_set_details (element_class, &gst_avi_demux_details);
}
static void
gst_avi_demux_class_init (GstAviDemuxClass * klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GObjectClass *gobject_class = (GObjectClass *) klass;
GST_DEBUG_CATEGORY_INIT (avidemux_debug, "avidemux",
0, "Demuxer for AVI streams");
parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = gst_avi_demux_finalize;
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_avi_demux_change_state);
gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_avi_demux_set_index);
gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_avi_demux_get_index);
}
static void
gst_avi_demux_init (GstAviDemux * avi)
{
avi->sinkpad = gst_pad_new_from_static_template (&sink_templ, "sink");
gst_pad_set_activate_function (avi->sinkpad,
GST_DEBUG_FUNCPTR (gst_avi_demux_sink_activate));
gst_pad_set_activatepull_function (avi->sinkpad,
GST_DEBUG_FUNCPTR (gst_avi_demux_sink_activate_pull));
gst_pad_set_activatepush_function (avi->sinkpad,
GST_DEBUG_FUNCPTR (gst_avi_demux_activate_push));
gst_pad_set_chain_function (avi->sinkpad,
GST_DEBUG_FUNCPTR (gst_avi_demux_chain));
gst_pad_set_event_function (avi->sinkpad,
GST_DEBUG_FUNCPTR (gst_avi_demux_handle_sink_event));
gst_element_add_pad (GST_ELEMENT (avi), avi->sinkpad);
avi->adapter = gst_adapter_new ();
gst_avi_demux_reset (avi);
}
static void
gst_avi_demux_finalize (GObject * object)
{
GstAviDemux *avi = GST_AVI_DEMUX (object);
GST_DEBUG ("AVI: finalize");
g_object_unref (avi->adapter);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_avi_demux_reset_stream (GstAviDemux * avi, GstAviStream * stream)
{
g_free (stream->strh);
g_free (stream->strf.data);
g_free (stream->name);
g_free (stream->index);
g_free (stream->indexes);
if (stream->initdata)
gst_buffer_unref (stream->initdata);
if (stream->extradata)
gst_buffer_unref (stream->extradata);
if (stream->pad) {
if (stream->exposed) {
gst_pad_set_active (stream->pad, FALSE);
gst_element_remove_pad (GST_ELEMENT (avi), stream->pad);
} else
gst_object_unref (stream->pad);
}
if (stream->taglist) {
gst_tag_list_free (stream->taglist);
stream->taglist = NULL;
}
memset (stream, 0, sizeof (GstAviStream));
}
static void
gst_avi_demux_reset (GstAviDemux * avi)
{
gint i;
GST_DEBUG ("AVI: reset");
for (i = 0; i < avi->num_streams; i++)
gst_avi_demux_reset_stream (avi, &avi->stream[i]);
avi->header_state = GST_AVI_DEMUX_HEADER_TAG_LIST;
avi->num_streams = 0;
avi->num_v_streams = 0;
avi->num_a_streams = 0;
avi->num_t_streams = 0;
avi->main_stream = -1;
avi->state = GST_AVI_DEMUX_START;
avi->offset = 0;
avi->index_offset = 0;
g_free (avi->avih);
avi->avih = NULL;
if (avi->element_index)
gst_object_unref (avi->element_index);
avi->element_index = NULL;
if (avi->seek_event) {
gst_event_unref (avi->seek_event);
avi->seek_event = NULL;
}
if (avi->globaltags)
gst_tag_list_free (avi->globaltags);
avi->globaltags = NULL;
avi->got_tags = TRUE; /* we always want to push global tags */
avi->have_eos = FALSE;
avi->seekable = TRUE;
gst_adapter_clear (avi->adapter);
gst_segment_init (&avi->segment, GST_FORMAT_TIME);
}
/* GstElement methods */
#if 0
static const GstFormat *
gst_avi_demux_get_src_formats (GstPad * pad)
{
GstAviStream *stream = gst_pad_get_element_private (pad);
static const GstFormat src_a_formats[] = {
GST_FORMAT_TIME,
GST_FORMAT_BYTES,
GST_FORMAT_DEFAULT,
0
};
static const GstFormat src_v_formats[] = {
GST_FORMAT_TIME,
GST_FORMAT_DEFAULT,
0
};
return (stream->strh->type == GST_RIFF_FCC_auds ?
src_a_formats : src_v_formats);
}
#endif
/* assumes stream->strf.auds->av_bps != 0 */
static inline GstClockTime
avi_stream_convert_bytes_to_time_unchecked (GstAviStream * stream,
guint64 bytes)
{
return gst_util_uint64_scale_int (bytes, GST_SECOND,
stream->strf.auds->av_bps);
}
static inline guint64
avi_stream_convert_time_to_bytes_unchecked (GstAviStream * stream,
GstClockTime time)
{
return gst_util_uint64_scale_int (time, stream->strf.auds->av_bps,
GST_SECOND);
}
/* assumes stream->strh->rate != 0 */
static inline GstClockTime
avi_stream_convert_frames_to_time_unchecked (GstAviStream * stream,
guint64 frames)
{
return gst_util_uint64_scale (frames, stream->strh->scale * GST_SECOND,
stream->strh->rate);
}
static inline guint64
avi_stream_convert_time_to_frames_unchecked (GstAviStream * stream,
GstClockTime time)
{
return gst_util_uint64_scale (time, stream->strh->rate,
stream->strh->scale * GST_SECOND);
}
static gboolean
gst_avi_demux_src_convert (GstPad * pad,
GstFormat src_format,
gint64 src_value, GstFormat * dest_format, gint64 * dest_value)
{
GstAviStream *stream = gst_pad_get_element_private (pad);
gboolean res = TRUE;
GST_LOG_OBJECT (pad,
"Received src_format:%s, src_value:%" G_GUINT64_FORMAT
", dest_format:%s", gst_format_get_name (src_format), src_value,
gst_format_get_name (*dest_format));
if (G_UNLIKELY (src_format == *dest_format)) {
*dest_value = src_value;
goto done;
}
if (G_UNLIKELY (!stream->strh || !stream->strf.data)) {
res = FALSE;
goto done;
}
if (G_UNLIKELY (stream->strh->type == GST_RIFF_FCC_vids &&
(src_format == GST_FORMAT_BYTES
|| *dest_format == GST_FORMAT_BYTES))) {
res = FALSE;
goto done;
}
switch (src_format) {
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
*dest_value = gst_util_uint64_scale_int (src_value,
stream->strf.auds->av_bps, GST_SECOND);
break;
case GST_FORMAT_DEFAULT:
*dest_value =
gst_util_uint64_scale_round (src_value, stream->strh->rate,
stream->strh->scale * GST_SECOND);
break;
default:
res = FALSE;
break;
}
break;
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_TIME:
if (stream->strf.auds->av_bps != 0) {
*dest_value = avi_stream_convert_bytes_to_time_unchecked (stream,
src_value);
} else
res = FALSE;
break;
default:
res = FALSE;
break;
}
break;
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value =
avi_stream_convert_frames_to_time_unchecked (stream, src_value);
break;
default:
res = FALSE;
break;
}
break;
default:
res = FALSE;
}
done:
GST_LOG_OBJECT (pad,
"Returning res:%d dest_format:%s dest_value:%" G_GUINT64_FORMAT, res,
gst_format_get_name (*dest_format), *dest_value);
return res;
}
static const GstQueryType *
gst_avi_demux_get_src_query_types (GstPad * pad)
{
static const GstQueryType src_types[] = {
GST_QUERY_POSITION,
GST_QUERY_DURATION,
GST_QUERY_SEEKING,
GST_QUERY_CONVERT,
0
};
return src_types;
}
static gboolean
gst_avi_demux_handle_src_query (GstPad * pad, GstQuery * query)
{
gboolean res = TRUE;
GstAviDemux *avi = GST_AVI_DEMUX (gst_pad_get_parent (pad));
GstAviStream *stream = gst_pad_get_element_private (pad);
if (!stream->strh || !stream->strf.data)
return gst_pad_query_default (pad, query);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:{
gint64 pos = 0;
GST_DEBUG ("pos query for stream %u: frames %u, bytes %u",
stream->num, stream->current_entry, stream->current_total);
/* FIXME, this looks clumsy */
if (stream->strh->type == GST_RIFF_FCC_auds) {
if (stream->is_vbr) {
/* VBR */
pos = gst_util_uint64_scale ((gint64) stream->current_entry *
stream->strh->scale, GST_SECOND, (guint64) stream->strh->rate);
GST_DEBUG_OBJECT (avi, "VBR convert frame %u, time %"
GST_TIME_FORMAT, stream->current_entry, GST_TIME_ARGS (pos));
} else if (stream->strf.auds->av_bps != 0) {
/* CBR */
pos = gst_util_uint64_scale (stream->current_total, GST_SECOND,
(guint64) stream->strf.auds->av_bps);
GST_DEBUG_OBJECT (avi,
"CBR convert bytes %u, time %" GST_TIME_FORMAT,
stream->current_total, GST_TIME_ARGS (pos));
} else if (stream->idx_n != 0 && stream->total_bytes != 0) {
/* calculate timestamps based on percentage of length */
guint64 xlen = avi->avih->us_frame *
avi->avih->tot_frames * GST_USECOND;
if (stream->is_vbr) {
pos = gst_util_uint64_scale (xlen, stream->current_entry,
stream->idx_n);
GST_DEBUG_OBJECT (avi, "VBR perc convert frame %u, time %"
GST_TIME_FORMAT, stream->current_entry, GST_TIME_ARGS (pos));
} else {
pos = gst_util_uint64_scale (xlen, stream->current_total,
stream->total_bytes);
GST_DEBUG_OBJECT (avi,
"CBR perc convert bytes %u, time %" GST_TIME_FORMAT,
stream->current_total, GST_TIME_ARGS (pos));
}
} else {
/* we don't know */
res = FALSE;
}
} else {
if (stream->strh->rate != 0) {
pos = gst_util_uint64_scale ((guint64) stream->current_entry *
stream->strh->scale, GST_SECOND, (guint64) stream->strh->rate);
} else {
pos = stream->current_entry * avi->avih->us_frame * GST_USECOND;
}
}
if (res) {
GST_DEBUG ("pos query : %" GST_TIME_FORMAT, GST_TIME_ARGS (pos));
gst_query_set_position (query, GST_FORMAT_TIME, pos);
} else
GST_WARNING ("pos query failed");
break;
}
case GST_QUERY_DURATION:
{
GstFormat fmt;
if (stream->strh->type != GST_RIFF_FCC_auds &&
stream->strh->type != GST_RIFF_FCC_vids) {
res = FALSE;
break;
}
gst_query_parse_duration (query, &fmt, NULL);
switch (fmt) {
case GST_FORMAT_TIME:
gst_query_set_duration (query, fmt, stream->duration);
break;
case GST_FORMAT_DEFAULT:
{
gint64 dur;
GST_DEBUG_OBJECT (query, "total frames is %" G_GUINT32_FORMAT,
stream->idx_n);
if (stream->idx_n >= 0)
gst_query_set_duration (query, fmt, stream->idx_n);
else if (gst_pad_query_convert (pad, GST_FORMAT_TIME,
stream->duration, &fmt, &dur))
gst_query_set_duration (query, fmt, dur);
break;
}
default:
res = FALSE;
break;
}
break;
}
case GST_QUERY_SEEKING:{
GstFormat fmt;
gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
if (fmt == GST_FORMAT_TIME) {
gboolean seekable = TRUE;
if (avi->streaming) {
seekable = avi->seekable;
}
gst_query_set_seeking (query, GST_FORMAT_TIME, seekable,
0, stream->duration);
res = TRUE;
}
break;
}
case GST_QUERY_CONVERT:{
GstFormat src_fmt, dest_fmt;
gint64 src_val, dest_val;
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
if ((res = gst_avi_demux_src_convert (pad, src_fmt, src_val, &dest_fmt,
&dest_val)))
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
else
res = gst_pad_query_default (pad, query);
break;
}
default:
res = gst_pad_query_default (pad, query);
break;
}
gst_object_unref (avi);
return res;
}
#if 0
static const GstEventMask *
gst_avi_demux_get_event_mask (GstPad * pad)
{
static const GstEventMask masks[] = {
{GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_KEY_UNIT},
{0,}
};
return masks;
}
#endif
static guint64
gst_avi_demux_seek_streams (GstAviDemux * avi, guint64 offset, gboolean before)
{
GstAviStream *stream;
GstIndexEntry *entry;
gint i;
gint64 val, min = offset;
for (i = 0; i < avi->num_streams; i++) {
stream = &avi->stream[i];
entry = gst_index_get_assoc_entry (avi->element_index, stream->index_id,
before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
GST_ASSOCIATION_FLAG_NONE, GST_FORMAT_BYTES, offset);
if (before) {
if (entry) {
GST_DEBUG_OBJECT (avi, "stream %d, previous entry at %"
G_GUINT64_FORMAT, i, val);
gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &val);
if (val < min)
min = val;
}
continue;
}
if (!entry) {
GST_DEBUG_OBJECT (avi, "no position for stream %d, assuming at start", i);
stream->current_entry = 0;
stream->current_total = 0;
continue;
}
gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &val);
GST_DEBUG_OBJECT (avi, "stream %d, next entry at %" G_GUINT64_FORMAT,
i, val);
gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &val);
stream->current_total = val;
gst_index_entry_assoc_map (entry, GST_FORMAT_DEFAULT, &val);
stream->current_entry = val;
}
return min;
}
#define GST_AVI_SEEK_PUSH_DISPLACE (4 * GST_SECOND)
static gboolean
gst_avi_demux_handle_sink_event (GstPad * pad, GstEvent * event)
{
gboolean res = TRUE;
GstAviDemux *avi = GST_AVI_DEMUX (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (avi,
"have event type %s: %p on sink pad", GST_EVENT_TYPE_NAME (event), event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:
{
GstFormat format;
gdouble rate, arate;
gint64 start, stop, time, offset = 0;
gboolean update;
GstSegment segment;
GstIndexEntry *entry;
/* some debug output */
gst_segment_init (&segment, GST_FORMAT_UNDEFINED);
gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
&start, &stop, &time);
gst_segment_set_newsegment_full (&segment, update, rate, arate, format,
start, stop, time);
GST_DEBUG_OBJECT (avi,
"received format %d newsegment %" GST_SEGMENT_FORMAT, format,
&segment);
/* chain will send initial newsegment after pads have been added */
if (avi->state != GST_AVI_DEMUX_MOVI) {
GST_DEBUG_OBJECT (avi, "still starting, eating event");
goto exit;
}
/* we only expect a BYTE segment, e.g. following a seek */
if (format != GST_FORMAT_BYTES) {
GST_DEBUG_OBJECT (avi, "unsupported segment format, ignoring");
goto exit;
}
if (!avi->element_index) {
GST_WARNING_OBJECT (avi, "no index data, forcing EOS");
goto eos;
}
/* Let's check if we have an index entry for this position */
entry = gst_index_get_assoc_entry (avi->element_index, avi->index_id,
GST_INDEX_LOOKUP_AFTER, GST_ASSOCIATION_FLAG_NONE,
GST_FORMAT_BYTES, start);
/* we can not go where we have not yet been before ... */
if (!entry) {
GST_WARNING_OBJECT (avi, "insufficient index data, forcing EOS");
goto eos;
}
offset = start;
gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &time);
gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &start);
stop = GST_CLOCK_TIME_NONE;
/* compensate for slack */
if (time)
time += GST_AVI_SEEK_PUSH_DISPLACE;
/* set up segment and send downstream */
gst_segment_set_newsegment_full (&avi->segment, update, rate, arate,
GST_FORMAT_TIME, time, stop, time);
GST_DEBUG_OBJECT (avi, "Pushing newseg update %d, rate %g, "
"applied rate %g, format %d, start %" G_GINT64_FORMAT ", "
"stop %" G_GINT64_FORMAT, update, rate, arate, GST_FORMAT_TIME,
time, stop);
gst_avi_demux_push_event (avi,
gst_event_new_new_segment_full (update, rate, arate, GST_FORMAT_TIME,
time, stop, time));
GST_DEBUG_OBJECT (avi, "next chunk expected at %" G_GINT64_FORMAT, start);
/* adjust state for streaming thread accordingly */
avi->offset = offset;
gst_avi_demux_seek_streams (avi, offset, FALSE);
/* set up streaming thread */
avi->offset = offset;
avi->todrop = start - offset;
exit:
/* in any case, clear leftover in current segment, if any */
gst_adapter_clear (avi->adapter);
gst_event_unref (event);
res = TRUE;
break;
eos:
/* set up for EOS */
avi->have_eos = TRUE;
goto exit;
}
case GST_EVENT_EOS:
{
if (avi->state != GST_AVI_DEMUX_MOVI) {
gst_event_unref (event);
GST_ELEMENT_ERROR (avi, STREAM, DEMUX,
(NULL), ("got eos and didn't receive a complete header object"));
} else if (!gst_avi_demux_push_event (avi, event)) {
GST_ELEMENT_ERROR (avi, STREAM, DEMUX,
(NULL), ("got eos but no streams (yet)"));
}
break;
}
default:
res = gst_pad_event_default (pad, event);
break;
}
gst_object_unref (avi);
return res;
}
static gboolean
gst_avi_demux_handle_src_event (GstPad * pad, GstEvent * event)
{
gboolean res = TRUE;
GstAviDemux *avi = GST_AVI_DEMUX (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (avi,
"have event type %s: %p on src pad", GST_EVENT_TYPE_NAME (event), event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
/* handle seeking only in pull mode */
if (!avi->streaming) {
res = gst_avi_demux_handle_seek (avi, pad, event);
} else {
res = gst_avi_demux_handle_seek_push (avi, pad, event);
}
gst_event_unref (event);
break;
case GST_EVENT_QOS:
case GST_EVENT_NAVIGATION:
res = FALSE;
gst_event_unref (event);
break;
default:
res = gst_pad_event_default (pad, event);
break;
}
gst_object_unref (avi);
return res;
}
/* streaming helper (push) */
/*
* gst_avi_demux_peek_chunk_info:
* @avi: Avi object
* @tag: holder for tag
* @size: holder for tag size
*
* Peek next chunk info (tag and size)
*
* Returns: TRUE when one chunk info has been got
*/
static gboolean
gst_avi_demux_peek_chunk_info (GstAviDemux * avi, guint32 * tag, guint32 * size)
{
const guint8 *data = NULL;
if (gst_adapter_available (avi->adapter) < 8)
return FALSE;
data = gst_adapter_peek (avi->adapter, 8);
*tag = GST_READ_UINT32_LE (data);
*size = GST_READ_UINT32_LE (data + 4);
return TRUE;
}
/*
* gst_avi_demux_peek_chunk:
* @avi: Avi object
* @tag: holder for tag
* @size: holder for tag size
*
* Peek enough data for one full chunk
*
* Returns: %TRUE when one chunk has been got
*/
static gboolean
gst_avi_demux_peek_chunk (GstAviDemux * avi, guint32 * tag, guint32 * size)
{
guint32 peek_size = 0;
gint available;
if (!gst_avi_demux_peek_chunk_info (avi, tag, size))
goto peek_failed;
/* size 0 -> empty data buffer would surprise most callers,
* large size -> do not bother trying to squeeze that into adapter,
* so we throw poor man's exception, which can be caught if caller really
* wants to handle 0 size chunk */
if (!(*size) || (*size) >= (1 << 30))
goto strange_size;
peek_size = (*size + 1) & ~1;
available = gst_adapter_available (avi->adapter);
GST_DEBUG_OBJECT (avi,
"Need to peek chunk of %d bytes to read chunk %" GST_FOURCC_FORMAT
", %d bytes available", *size, GST_FOURCC_ARGS (*tag), available);
if (available < (8 + peek_size))
goto need_more;
return TRUE;
/* ERRORS */
peek_failed:
{
GST_INFO_OBJECT (avi, "Failed to peek");
return FALSE;
}
strange_size:
{
GST_INFO_OBJECT (avi,
"Invalid/unexpected chunk size %d for tag %" GST_FOURCC_FORMAT, *size,
GST_FOURCC_ARGS (*tag));
/* chain should give up */
avi->abort_buffering = TRUE;
return FALSE;
}
need_more:
{
GST_INFO_OBJECT (avi, "need more %d < %" G_GUINT32_FORMAT,
available, 8 + peek_size);
return FALSE;
}
}
/* AVI init */
/*
* gst_avi_demux_parse_file_header:
* @element: caller element (used for errors/debug).
* @buf: input data to be used for parsing.
*
* "Open" a RIFF/AVI file. The buffer should be at least 12
* bytes long. Takes ownership of @buf.
*
* Returns: TRUE if the file is a RIFF/AVI file, FALSE otherwise.
* Throws an error, caller should error out (fatal).
*/
static gboolean
gst_avi_demux_parse_file_header (GstElement * element, GstBuffer * buf)
{
guint32 doctype;
GstClockTime stamp;
stamp = gst_util_get_timestamp ();
/* riff_parse posts an error */
if (!gst_riff_parse_file_header (element, buf, &doctype))
return FALSE;
if (doctype != GST_RIFF_RIFF_AVI)
goto not_avi;
stamp = gst_util_get_timestamp () - stamp;
GST_DEBUG_OBJECT (element, "parsing header %" GST_TIME_FORMAT,
GST_TIME_ARGS (stamp));
return TRUE;
/* ERRORS */
not_avi:
{
GST_ELEMENT_ERROR (element, STREAM, WRONG_TYPE, (NULL),
("File is not an AVI file: %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (doctype)));
return FALSE;
}
}
/*
* Read AVI file tag when streaming
*/
static GstFlowReturn
gst_avi_demux_stream_init_push (GstAviDemux * avi)
{
if (gst_adapter_available (avi->adapter) >= 12) {
GstBuffer *tmp;
tmp = gst_adapter_take_buffer (avi->adapter, 12);
GST_DEBUG ("Parsing avi header");
if (!gst_avi_demux_parse_file_header (GST_ELEMENT (avi), tmp)) {
return GST_FLOW_ERROR;
}
GST_DEBUG ("header ok");
avi->offset += 12;
avi->state = GST_AVI_DEMUX_HEADER;
}
return GST_FLOW_OK;
}
/*
* Read AVI file tag
*/
static GstFlowReturn
gst_avi_demux_stream_init_pull (GstAviDemux * avi)
{
GstFlowReturn res;
GstBuffer *buf = NULL;
res = gst_pad_pull_range (avi->sinkpad, avi->offset, 12, &buf);
if (res != GST_FLOW_OK)
return res;
else if (!gst_avi_demux_parse_file_header (GST_ELEMENT_CAST (avi), buf))
goto wrong_header;
avi->offset += 12;
return GST_FLOW_OK;
/* ERRORS */
wrong_header:
{
GST_DEBUG_OBJECT (avi, "error parsing file header");
return GST_FLOW_ERROR;
}
}
/* AVI header handling */
/*
* gst_avi_demux_parse_avih:
* @element: caller element (used for errors/debug).
* @buf: input data to be used for parsing.
* @avih: pointer to structure (filled in by function) containing
* stream information (such as flags, number of streams, etc.).
*
* Read 'avih' header. Discards buffer after use.
*
* Returns: TRUE on success, FALSE otherwise. Throws an error if
* the header is invalid. The caller should error out
* (fatal).
*/
static gboolean
gst_avi_demux_parse_avih (GstElement * element,
GstBuffer * buf, gst_riff_avih ** _avih)
{
gst_riff_avih *avih;
if (buf == NULL)
goto no_buffer;
if (GST_BUFFER_SIZE (buf) < sizeof (gst_riff_avih))
goto avih_too_small;
avih = g_memdup (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
#if (G_BYTE_ORDER == G_BIG_ENDIAN)
avih->us_frame = GUINT32_FROM_LE (avih->us_frame);
avih->max_bps = GUINT32_FROM_LE (avih->max_bps);
avih->pad_gran = GUINT32_FROM_LE (avih->pad_gran);
avih->flags = GUINT32_FROM_LE (avih->flags);
avih->tot_frames = GUINT32_FROM_LE (avih->tot_frames);
avih->init_frames = GUINT32_FROM_LE (avih->init_frames);
avih->streams = GUINT32_FROM_LE (avih->streams);
avih->bufsize = GUINT32_FROM_LE (avih->bufsize);
avih->width = GUINT32_FROM_LE (avih->width);
avih->height = GUINT32_FROM_LE (avih->height);
avih->scale = GUINT32_FROM_LE (avih->scale);
avih->rate = GUINT32_FROM_LE (avih->rate);
avih->start = GUINT32_FROM_LE (avih->start);
avih->length = GUINT32_FROM_LE (avih->length);
#endif
/* debug stuff */
GST_INFO_OBJECT (element, "avih tag found:");
GST_INFO_OBJECT (element, " us_frame %u", avih->us_frame);
GST_INFO_OBJECT (element, " max_bps %u", avih->max_bps);
GST_INFO_OBJECT (element, " pad_gran %u", avih->pad_gran);
GST_INFO_OBJECT (element, " flags 0x%08x", avih->flags);
GST_INFO_OBJECT (element, " tot_frames %u", avih->tot_frames);
GST_INFO_OBJECT (element, " init_frames %u", avih->init_frames);
GST_INFO_OBJECT (element, " streams %u", avih->streams);
GST_INFO_OBJECT (element, " bufsize %u", avih->bufsize);
GST_INFO_OBJECT (element, " width %u", avih->width);
GST_INFO_OBJECT (element, " height %u", avih->height);
GST_INFO_OBJECT (element, " scale %u", avih->scale);
GST_INFO_OBJECT (element, " rate %u", avih->rate);
GST_INFO_OBJECT (element, " start %u", avih->start);
GST_INFO_OBJECT (element, " length %u", avih->length);
*_avih = avih;
gst_buffer_unref (buf);
return TRUE;
/* ERRORS */
no_buffer:
{
GST_ELEMENT_ERROR (element, STREAM, DEMUX, (NULL), ("No buffer"));
return FALSE;
}
avih_too_small:
{
GST_ELEMENT_ERROR (element, STREAM, DEMUX, (NULL),
("Too small avih (%d available, %d needed)",
GST_BUFFER_SIZE (buf), (int) sizeof (gst_riff_avih)));
gst_buffer_unref (buf);
return FALSE;
}
}
/*
* gst_avi_demux_parse_superindex:
* @avi: caller element (used for debugging/errors).
* @buf: input data to use for parsing.
* @locations: locations in the file (byte-offsets) that contain
* the actual indexes (see get_avi_demux_parse_subindex()).
* The array ends with GST_BUFFER_OFFSET_NONE.
*
* Reads superindex (openDML-2 spec stuff) from the provided data.
*
* Returns: TRUE on success, FALSE otherwise. Indexes should be skipped
* on error, but they are not fatal.
*/
static gboolean
gst_avi_demux_parse_superindex (GstAviDemux * avi,
GstBuffer * buf, guint64 ** _indexes)
{
guint8 *data;
guint16 bpe = 16;
guint32 num, i;
guint64 *indexes;
guint size;
*_indexes = NULL;
size = buf ? GST_BUFFER_SIZE (buf) : 0;
if (size < 24)
goto too_small;
data = GST_BUFFER_DATA (buf);
/* check type of index. The opendml2 specs state that
* there should be 4 dwords per array entry. Type can be
* either frame or field (and we don't care). */
if (GST_READ_UINT16_LE (data) != 4 ||
(data[2] & 0xfe) != 0x0 || data[3] != 0x0) {
GST_WARNING_OBJECT (avi,
"Superindex for stream has unexpected "
"size_entry %d (bytes) or flags 0x%02x/0x%02x",
GST_READ_UINT16_LE (data), data[2], data[3]);
bpe = GST_READ_UINT16_LE (data) * 4;
}
num = GST_READ_UINT32_LE (&data[4]);
GST_DEBUG_OBJECT (avi, "got %d indexes", num);
indexes = g_new (guint64, num + 1);
for (i = 0; i < num; i++) {
if (size < 24 + bpe * (i + 1))
break;
indexes[i] = GST_READ_UINT64_LE (&data[24 + bpe * i]);
GST_DEBUG_OBJECT (avi, "index %d at %" G_GUINT64_FORMAT, i, indexes[i]);
}
indexes[i] = GST_BUFFER_OFFSET_NONE;
*_indexes = indexes;
gst_buffer_unref (buf);
return TRUE;
/* ERRORS */
too_small:
{
GST_ERROR_OBJECT (avi,
"Not enough data to parse superindex (%d available, 24 needed)", size);
if (buf)
gst_buffer_unref (buf);
return FALSE;
}
}
/* add an entry to the index of a stream. @num should be an estimate of the
* total amount of index entries for all streams and is used to dynamically
* allocate memory for the index entries. */
static inline gboolean
gst_avi_demux_add_index (GstAviDemux * avi, GstAviStream * stream,
guint num, GstAviIndexEntry * entry)
{
/* ensure index memory */
if (G_UNLIKELY (stream->idx_n >= stream->idx_max)) {
guint idx_max = stream->idx_max;
GstAviIndexEntry *new_idx;
/* we need to make some more room */
if (idx_max == 0) {
/* initial size guess, assume each stream has an equal amount of entries,
* overshoot with at least 8K */
idx_max = (num / avi->num_streams) + (8192 / sizeof (GstAviIndexEntry));
} else {
idx_max += 8192 / sizeof (GstAviIndexEntry);
GST_DEBUG_OBJECT (avi, "expanded index from %u to %u",
stream->idx_max, idx_max);
}
new_idx = g_try_renew (GstAviIndexEntry, stream->index, idx_max);
/* out of memory, if this fails stream->index is untouched. */
if (G_UNLIKELY (!new_idx))
return FALSE;
/* use new index */
stream->index = new_idx;
stream->idx_max = idx_max;
}
/* update entry total and stream stats. The entry total can be converted to
* the timestamp of the entry easily. */
if (stream->strh->type == GST_RIFF_FCC_auds) {
gint blockalign;
if (stream->is_vbr) {
entry->total = stream->total_blocks;
} else {
entry->total = stream->total_bytes;
}
blockalign = stream->strf.auds->blockalign;
if (blockalign > 0)
stream->total_blocks += DIV_ROUND_UP (entry->size, blockalign);
else
stream->total_blocks++;
} else {
if (stream->is_vbr) {
entry->total = stream->idx_n;
} else {
entry->total = stream->total_bytes;
}
}
stream->total_bytes += entry->size;
if (ENTRY_IS_KEYFRAME (entry))
stream->n_keyframes++;
/* and add */
GST_LOG_OBJECT (avi,
"Adding stream %u, index entry %d, kf %d, size %u "
", offset %" G_GUINT64_FORMAT ", total %" G_GUINT64_FORMAT, stream->num,
stream->idx_n, ENTRY_IS_KEYFRAME (entry), entry->size, entry->offset,
entry->total);
stream->index[stream->idx_n++] = *entry;
return TRUE;
}
/* given @entry_n in @stream, calculate info such as timestamps and
* offsets for the entry. */
static void
gst_avi_demux_get_buffer_info (GstAviDemux * avi, GstAviStream * stream,
guint entry_n, GstClockTime * timestamp, GstClockTime * ts_end,
guint64 * offset, guint64 * offset_end)
{
GstAviIndexEntry *entry;
entry = &stream->index[entry_n];
if (stream->is_vbr) {
/* VBR stream next timestamp */
if (stream->strh->type == GST_RIFF_FCC_auds) {
if (timestamp)
*timestamp =
avi_stream_convert_frames_to_time_unchecked (stream, entry->total);
if (ts_end)
*ts_end = avi_stream_convert_frames_to_time_unchecked (stream,
entry->total + 1);
} else {
if (timestamp)
*timestamp =
avi_stream_convert_frames_to_time_unchecked (stream, entry_n);
if (ts_end)
*ts_end = avi_stream_convert_frames_to_time_unchecked (stream,
entry_n + 1);
}
} else if (stream->strh->type == GST_RIFF_FCC_auds) {
/* constant rate stream */
if (timestamp)
*timestamp =
avi_stream_convert_bytes_to_time_unchecked (stream, entry->total);
if (ts_end)
*ts_end = avi_stream_convert_bytes_to_time_unchecked (stream,
entry->total + entry->size);
}
if (stream->strh->type == GST_RIFF_FCC_vids) {
/* video offsets are the frame number */
if (offset)
*offset = entry_n;
if (offset_end)
*offset_end = entry_n + 1;
} else {
/* no offsets for audio */
if (offset)
*offset = -1;
if (offset_end)
*offset_end = -1;
}
}
/* collect and debug stats about the indexes for all streams.
* This method is also responsible for filling in the stream duration
* as measured by the amount of index entries.
*
* Returns TRUE if the index is not empty, else FALSE */
static gboolean
gst_avi_demux_do_index_stats (GstAviDemux * avi)
{
guint total_idx = 0;
guint i;
#ifndef GST_DISABLE_GST_DEBUG
guint total_max = 0;
#endif
/* get stream stats now */
for (i = 0; i < avi->num_streams; i++) {
GstAviStream *stream;
if (G_UNLIKELY (!(stream = &avi->stream[i])))
continue;
if (G_UNLIKELY (!stream->strh))
continue;
if (G_UNLIKELY (!stream->index || stream->idx_n == 0))
continue;
/* we interested in the end_ts of the last entry, which is the total
* duration of this stream */
gst_avi_demux_get_buffer_info (avi, stream, stream->idx_n - 1,
NULL, &stream->idx_duration, NULL, NULL);
total_idx += stream->idx_n;
#ifndef GST_DISABLE_GST_DEBUG
total_max += stream->idx_max;
#endif
GST_INFO_OBJECT (avi, "Stream %d, dur %" GST_TIME_FORMAT ", %6u entries, "
"%5u keyframes, entry size = %2u, total size = %10u, allocated %10u",
i, GST_TIME_ARGS (stream->idx_duration), stream->idx_n,
stream->n_keyframes, (guint) sizeof (GstAviIndexEntry),
(guint) (stream->idx_n * sizeof (GstAviIndexEntry)),
(guint) (stream->idx_max * sizeof (GstAviIndexEntry)));
}
total_idx *= sizeof (GstAviIndexEntry);
#ifndef GST_DISABLE_GST_DEBUG
total_max *= sizeof (GstAviIndexEntry);
#endif
GST_INFO_OBJECT (avi, "%u bytes for index vs %u ideally, %u wasted",
total_max, total_idx, total_max - total_idx);
if (total_idx == 0) {
GST_WARNING_OBJECT (avi, "Index is empty !");
return FALSE;
}
return TRUE;
}
/*
* gst_avi_demux_parse_subindex:
* @avi: Avi object
* @buf: input data to use for parsing.
* @stream: stream context.
* @entries_list: a list (returned by the function) containing all the
* indexes parsed in this specific subindex. The first
* entry is also a pointer to allocated memory that needs
* to be free´ed. May be NULL if no supported indexes were
* found.
*
* Reads superindex (openDML-2 spec stuff) from the provided data.
* The buffer should contain a GST_RIFF_TAG_ix?? chunk.
*
* Returns: TRUE on success, FALSE otherwise. Errors are fatal, we
* throw an error, caller should bail out asap.
*/
static gboolean
gst_avi_demux_parse_subindex (GstAviDemux * avi, GstAviStream * stream,
GstBuffer * buf)
{
guint8 *data;
guint16 bpe;
guint32 num, i;
guint64 baseoff;
guint size;
if (!buf)
return TRUE;
size = GST_BUFFER_SIZE (buf);
/* check size */
if (size < 24)
goto too_small;
data = GST_BUFFER_DATA (buf);
/* We don't support index-data yet */
if (data[3] & 0x80)
goto not_implemented;
/* check type of index. The opendml2 specs state that
* there should be 4 dwords per array entry. Type can be
* either frame or field (and we don't care). */
bpe = (data[2] & 0x01) ? 12 : 8;
if (GST_READ_UINT16_LE (data) != bpe / 4 ||
(data[2] & 0xfe) != 0x0 || data[3] != 0x1) {
GST_WARNING_OBJECT (avi,
"Superindex for stream %d has unexpected "
"size_entry %d (bytes) or flags 0x%02x/0x%02x",
stream->num, GST_READ_UINT16_LE (data), data[2], data[3]);
bpe = GST_READ_UINT16_LE (data) * 4;
}
num = GST_READ_UINT32_LE (&data[4]);
baseoff = GST_READ_UINT64_LE (&data[12]);
/* If there's nothing, just return ! */
if (num == 0)
goto empty_index;
GST_INFO_OBJECT (avi, "Parsing subindex, nr_entries = %6d", num);
for (i = 0; i < num; i++) {
GstAviIndexEntry entry;
if (size < 24 + bpe * (i + 1))
break;
/* fill in offset and size. offset contains the keyframe flag in the
* upper bit*/
entry.offset = baseoff + GST_READ_UINT32_LE (&data[24 + bpe * i]);
entry.size = GST_READ_UINT32_LE (&data[24 + bpe * i + 4]);
/* handle flags */
if (stream->strh->type == GST_RIFF_FCC_auds) {
/* all audio frames are keyframes */
ENTRY_SET_KEYFRAME (&entry);
} else {
/* else read flags */
entry.flags = (entry.size & 0x80000000) ? 0 : GST_AVI_KEYFRAME;
}
entry.size &= ~0x80000000;
/* and add */
if (G_UNLIKELY (!gst_avi_demux_add_index (avi, stream, num, &entry)))
goto out_of_mem;
}
gst_buffer_unref (buf);
return TRUE;
/* ERRORS */
too_small:
{
GST_ERROR_OBJECT (avi,
"Not enough data to parse subindex (%d available, 24 needed)", size);
gst_buffer_unref (buf);
return TRUE; /* continue */
}
not_implemented:
{
GST_ELEMENT_ERROR (avi, STREAM, NOT_IMPLEMENTED, (NULL),
("Subindex-is-data is not implemented"));
gst_buffer_unref (buf);
return FALSE;
}
empty_index:
{
GST_DEBUG_OBJECT (avi, "the index is empty");
gst_buffer_unref (buf);
return TRUE;
}
out_of_mem:
{
GST_ELEMENT_ERROR (avi, RESOURCE, NO_SPACE_LEFT, (NULL),
("Cannot allocate memory for %u*%u=%u bytes",
(guint) sizeof (GstAviIndexEntry), num,
(guint) sizeof (GstAviIndexEntry) * num));
gst_buffer_unref (buf);
return FALSE;
}
}
#if 0
/*
* Read AVI index when streaming
*/
static void
gst_avi_demux_read_subindexes_push (GstAviDemux * avi)
{
guint32 tag = 0, size;
GstBuffer *buf = NULL;
gint i, n;
GST_DEBUG_OBJECT (avi, "read subindexes for %d streams", avi->num_streams);
for (n = 0; n < avi->num_streams; n++) {
GstAviStream *stream = &avi->stream[n];
for (i = 0; stream->indexes[i] != GST_BUFFER_OFFSET_NONE; i++) {
if (!gst_avi_demux_peek_chunk (avi, &tag, &size))
continue;
else if ((tag != GST_MAKE_FOURCC ('i', 'x', '0' + stream->num / 10,
'0' + stream->num % 10)) &&
(tag != GST_MAKE_FOURCC ('0' + stream->num / 10,
'0' + stream->num % 10, 'i', 'x'))) {
GST_WARNING_OBJECT (avi, "Not an ix## chunk (%" GST_FOURCC_FORMAT ")",
GST_FOURCC_ARGS (tag));
continue;
}
avi->offset += 8 + GST_ROUND_UP_2 (size);
buf = gst_buffer_new ();
GST_BUFFER_DATA (buf) = gst_adapter_take (avi->adapter, size);
GST_BUFFER_SIZE (buf) = size;
if (!gst_avi_demux_parse_subindex (avi, stream, buf))
continue;
}
g_free (stream->indexes);
stream->indexes = NULL;
}
/* get stream stats now */
avi->have_index = gst_avi_demux_do_index_stats (avi);
}
#endif
/*
* Read AVI index
*/
static void
gst_avi_demux_read_subindexes_pull (GstAviDemux * avi)
{
guint32 tag;
GstBuffer *buf;
gint i, n;
GST_DEBUG_OBJECT (avi, "read subindexes for %d streams", avi->num_streams);
for (n = 0; n < avi->num_streams; n++) {
GstAviStream *stream = &avi->stream[n];
for (i = 0; stream->indexes[i] != GST_BUFFER_OFFSET_NONE; i++) {
if (gst_riff_read_chunk (GST_ELEMENT_CAST (avi), avi->sinkpad,
&stream->indexes[i], &tag, &buf) != GST_FLOW_OK)
continue;
else if ((tag != GST_MAKE_FOURCC ('i', 'x', '0' + stream->num / 10,
'0' + stream->num % 10)) &&
(tag != GST_MAKE_FOURCC ('0' + stream->num / 10,
'0' + stream->num % 10, 'i', 'x'))) {
/* Some ODML files (created by god knows what muxer) have a ##ix format
* instead of the 'official' ix##. They are still valid though. */
GST_WARNING_OBJECT (avi, "Not an ix## chunk (%" GST_FOURCC_FORMAT ")",
GST_FOURCC_ARGS (tag));
gst_buffer_unref (buf);
continue;
}
if (!gst_avi_demux_parse_subindex (avi, stream, buf))
continue;
}
g_free (stream->indexes);
stream->indexes = NULL;
}
/* get stream stats now */
avi->have_index = gst_avi_demux_do_index_stats (avi);
}
/*
* gst_avi_demux_riff_parse_vprp:
* @element: caller element (used for debugging/error).
* @buf: input data to be used for parsing, stripped from header.
* @vprp: a pointer (returned by this function) to a filled-in vprp
* structure. Caller should free it.
*
* Parses a video stream´s vprp. This function takes ownership of @buf.
*
* Returns: TRUE if parsing succeeded, otherwise FALSE. The stream
* should be skipped on error, but it is not fatal.
*/
static gboolean
gst_avi_demux_riff_parse_vprp (GstElement * element,
GstBuffer * buf, gst_riff_vprp ** _vprp)
{
gst_riff_vprp *vprp;
gint k;
g_return_val_if_fail (buf != NULL, FALSE);
g_return_val_if_fail (_vprp != NULL, FALSE);
if (GST_BUFFER_SIZE (buf) < G_STRUCT_OFFSET (gst_riff_vprp, field_info))
goto too_small;
vprp = g_memdup (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
#if (G_BYTE_ORDER == G_BIG_ENDIAN)
vprp->format_token = GUINT32_FROM_LE (vprp->format_token);
vprp->standard = GUINT32_FROM_LE (vprp->standard);
vprp->vert_rate = GUINT32_FROM_LE (vprp->vert_rate);
vprp->hor_t_total = GUINT32_FROM_LE (vprp->hor_t_total);
vprp->vert_lines = GUINT32_FROM_LE (vprp->vert_lines);
vprp->aspect = GUINT32_FROM_LE (vprp->aspect);
vprp->width = GUINT32_FROM_LE (vprp->width);
vprp->height = GUINT32_FROM_LE (vprp->height);
vprp->fields = GUINT32_FROM_LE (vprp->fields);
#endif
/* size checking */
/* calculate fields based on size */
k = (GST_BUFFER_SIZE (buf) - G_STRUCT_OFFSET (gst_riff_vprp, field_info)) /
vprp->fields;
if (vprp->fields > k) {
GST_WARNING_OBJECT (element,
"vprp header indicated %d fields, only %d available", vprp->fields, k);
vprp->fields = k;
}
if (vprp->fields > GST_RIFF_VPRP_VIDEO_FIELDS) {
GST_WARNING_OBJECT (element,
"vprp header indicated %d fields, at most %d supported", vprp->fields,
GST_RIFF_VPRP_VIDEO_FIELDS);
vprp->fields = GST_RIFF_VPRP_VIDEO_FIELDS;
}
#if (G_BYTE_ORDER == G_BIG_ENDIAN)
for (k = 0; k < vprp->fields; k++) {
gst_riff_vprp_video_field_desc *fd;
fd = &vprp->field_info[k];
fd->compressed_bm_height = GUINT32_FROM_LE (fd->compressed_bm_height);
fd->compressed_bm_width = GUINT32_FROM_LE (fd->compressed_bm_width);
fd->valid_bm_height = GUINT32_FROM_LE (fd->valid_bm_height);
fd->valid_bm_width = GUINT16_FROM_LE (fd->valid_bm_width);
fd->valid_bm_x_offset = GUINT16_FROM_LE (fd->valid_bm_x_offset);
fd->valid_bm_y_offset = GUINT32_FROM_LE (fd->valid_bm_y_offset);
fd->video_x_t_offset = GUINT32_FROM_LE (fd->video_x_t_offset);
fd->video_y_start = GUINT32_FROM_LE (fd->video_y_start);
}
#endif
/* debug */
GST_INFO_OBJECT (element, "vprp tag found in context vids:");
GST_INFO_OBJECT (element, " format_token %d", vprp->format_token);
GST_INFO_OBJECT (element, " standard %d", vprp->standard);
GST_INFO_OBJECT (element, " vert_rate %d", vprp->vert_rate);
GST_INFO_OBJECT (element, " hor_t_total %d", vprp->hor_t_total);
GST_INFO_OBJECT (element, " vert_lines %d", vprp->vert_lines);
GST_INFO_OBJECT (element, " aspect %d:%d", vprp->aspect >> 16,
vprp->aspect & 0xffff);
GST_INFO_OBJECT (element, " width %d", vprp->width);
GST_INFO_OBJECT (element, " height %d", vprp->height);
GST_INFO_OBJECT (element, " fields %d", vprp->fields);
for (k = 0; k < vprp->fields; k++) {
gst_riff_vprp_video_field_desc *fd;
fd = &(vprp->field_info[k]);
GST_INFO_OBJECT (element, " field %u description:", k);
GST_INFO_OBJECT (element, " compressed_bm_height %d",
fd->compressed_bm_height);
GST_INFO_OBJECT (element, " compressed_bm_width %d",
fd->compressed_bm_width);
GST_INFO_OBJECT (element, " valid_bm_height %d",
fd->valid_bm_height);
GST_INFO_OBJECT (element, " valid_bm_width %d", fd->valid_bm_width);
GST_INFO_OBJECT (element, " valid_bm_x_offset %d",
fd->valid_bm_x_offset);
GST_INFO_OBJECT (element, " valid_bm_y_offset %d",
fd->valid_bm_y_offset);
GST_INFO_OBJECT (element, " video_x_t_offset %d",
fd->video_x_t_offset);
GST_INFO_OBJECT (element, " video_y_start %d", fd->video_y_start);
}
gst_buffer_unref (buf);
*_vprp = vprp;
return TRUE;
/* ERRORS */
too_small:
{
GST_ERROR_OBJECT (element,
"Too small vprp (%d available, at least %d needed)",
GST_BUFFER_SIZE (buf),
(int) G_STRUCT_OFFSET (gst_riff_vprp, field_info));
gst_buffer_unref (buf);
return FALSE;
}
}
static void
gst_avi_demux_expose_streams (GstAviDemux * avi, gboolean force)
{
guint i;
GST_DEBUG_OBJECT (avi, "force : %d", force);
for (i = 0; i < avi->num_streams; i++) {
GstAviStream *stream = &avi->stream[i];
if (force || stream->idx_n != 0) {
GST_LOG_OBJECT (avi, "Added pad %s with caps %" GST_PTR_FORMAT,
GST_PAD_NAME (stream->pad), GST_PAD_CAPS (stream->pad));
gst_element_add_pad ((GstElement *) avi, stream->pad);
stream->exposed = TRUE;
if (avi->main_stream == -1)
avi->main_stream = i;
} else {
GST_WARNING_OBJECT (avi, "Stream #%d doesn't have any entry, removing it",
i);
gst_avi_demux_reset_stream (avi, stream);
}
}
}
/*
* gst_avi_demux_parse_stream:
* @avi: calling element (used for debugging/errors).
* @buf: input buffer used to parse the stream.
*
* Parses all subchunks in a strl chunk (which defines a single
* stream). Discards the buffer after use. This function will
* increment the stream counter internally.
*
* Returns: whether the stream was identified successfully.
* Errors are not fatal. It does indicate the stream
* was skipped.
*/
static gboolean
gst_avi_demux_parse_stream (GstAviDemux * avi, GstBuffer * buf)
{
GstAviStream *stream;
GstElementClass *klass;
GstPadTemplate *templ;
GstBuffer *sub = NULL;
guint offset = 4;
guint32 tag = 0;
gchar *codec_name = NULL, *padname = NULL;
const gchar *tag_name;
GstCaps *caps = NULL;
GstPad *pad;
GstElement *element;
gboolean got_strh = FALSE, got_strf = FALSE, got_vprp = FALSE;
gst_riff_vprp *vprp = NULL;
element = GST_ELEMENT_CAST (avi);
GST_DEBUG_OBJECT (avi, "Parsing stream");
if (avi->num_streams >= GST_AVI_DEMUX_MAX_STREAMS) {
GST_WARNING_OBJECT (avi,
"maximum no of streams (%d) exceeded, ignoring stream",
GST_AVI_DEMUX_MAX_STREAMS);
gst_buffer_unref (buf);
/* not a fatal error, let's say */
return TRUE;
}
stream = &avi->stream[avi->num_streams];
/* initial settings */
stream->idx_duration = GST_CLOCK_TIME_NONE;
stream->hdr_duration = GST_CLOCK_TIME_NONE;
stream->duration = GST_CLOCK_TIME_NONE;
while (gst_riff_parse_chunk (element, buf, &offset, &tag, &sub)) {
/* sub can be NULL if the chunk is empty */
if (sub == NULL) {
GST_DEBUG_OBJECT (avi, "ignoring empty chunk %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (tag));
continue;
}
switch (tag) {
case GST_RIFF_TAG_strh:
{
gst_riff_strh *strh;
if (got_strh) {
GST_WARNING_OBJECT (avi, "Ignoring additional strh chunk");
break;
}
if (!gst_riff_parse_strh (element, sub, &stream->strh)) {
/* ownership given away */
sub = NULL;
GST_WARNING_OBJECT (avi, "Failed to parse strh chunk");
goto fail;
}
sub = NULL;
strh = stream->strh;
/* sanity check; stream header frame rate matches global header
* frame duration */
if (stream->strh->type == GST_RIFF_FCC_vids) {
GstClockTime s_dur;
GstClockTime h_dur = avi->avih->us_frame * GST_USECOND;
s_dur = gst_util_uint64_scale (GST_SECOND, strh->scale, strh->rate);
GST_DEBUG_OBJECT (avi, "verifying stream framerate %d/%d, "
"frame duration = %d ms", strh->rate, strh->scale,
(gint) (s_dur / GST_MSECOND));
if (h_dur > (10 * GST_MSECOND) && (s_dur > 10 * h_dur)) {
strh->rate = GST_SECOND / GST_USECOND;
strh->scale = h_dur / GST_USECOND;
GST_DEBUG_OBJECT (avi, "correcting stream framerate to %d/%d",
strh->rate, strh->scale);
}
}
/* determine duration as indicated by header */
stream->hdr_duration = gst_util_uint64_scale ((guint64) strh->length *
strh->scale, GST_SECOND, (guint64) strh->rate);
GST_INFO ("Stream duration according to header: %" GST_TIME_FORMAT,
GST_TIME_ARGS (stream->hdr_duration));
if (stream->hdr_duration == 0)
stream->hdr_duration = GST_CLOCK_TIME_NONE;
got_strh = TRUE;
break;
}
case GST_RIFF_TAG_strf:
{
gboolean res = FALSE;
if (got_strf) {
GST_WARNING_OBJECT (avi, "Ignoring additional strf chunk");
break;
}
if (!got_strh) {
GST_ERROR_OBJECT (avi, "Found strf chunk before strh chunk");
goto fail;
}
switch (stream->strh->type) {
case GST_RIFF_FCC_vids:
stream->is_vbr = TRUE;
res = gst_riff_parse_strf_vids (element, sub,
&stream->strf.vids, &stream->extradata);
sub = NULL;
GST_DEBUG_OBJECT (element, "marking video as VBR, res %d", res);
break;
case GST_RIFF_FCC_auds:
stream->is_vbr = (stream->strh->samplesize == 0)
&& stream->strh->scale > 1;
res =
gst_riff_parse_strf_auds (element, sub, &stream->strf.auds,
&stream->extradata);
sub = NULL;
GST_DEBUG_OBJECT (element, "marking audio as VBR:%d, res %d",
stream->is_vbr, res);
break;
case GST_RIFF_FCC_iavs:
stream->is_vbr = TRUE;
res = gst_riff_parse_strf_iavs (element, sub,
&stream->strf.iavs, &stream->extradata);
sub = NULL;
GST_DEBUG_OBJECT (element, "marking iavs as VBR, res %d", res);
break;
case GST_RIFF_FCC_txts:
/* nothing to parse here */
stream->is_vbr = (stream->strh->samplesize == 0)
&& (stream->strh->scale > 1);
res = TRUE;
break;
default:
GST_ERROR_OBJECT (avi,
"Don´t know how to handle stream type %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (stream->strh->type));
break;
}
if (sub) {
gst_buffer_unref (sub);
sub = NULL;
}
if (!res)
goto fail;
got_strf = TRUE;
break;
}
case GST_RIFF_TAG_vprp:
{
if (got_vprp) {
GST_WARNING_OBJECT (avi, "Ignoring additional vprp chunk");
break;
}
if (!got_strh) {
GST_ERROR_OBJECT (avi, "Found vprp chunk before strh chunk");
goto fail;
}
if (!got_strf) {
GST_ERROR_OBJECT (avi, "Found vprp chunk before strf chunk");
goto fail;
}
if (!gst_avi_demux_riff_parse_vprp (element, sub, &vprp)) {
GST_WARNING_OBJECT (avi, "Failed to parse vprp chunk");
/* not considered fatal */
g_free (vprp);
vprp = NULL;
} else
got_vprp = TRUE;
sub = NULL;
break;
}
case GST_RIFF_TAG_strd:
if (stream->initdata)
gst_buffer_unref (stream->initdata);
stream->initdata = sub;
sub = NULL;
break;
case GST_RIFF_TAG_strn:
g_free (stream->name);
if (sub != NULL) {
stream->name =
g_strndup ((gchar *) GST_BUFFER_DATA (sub),
(gsize) GST_BUFFER_SIZE (sub));
gst_buffer_unref (sub);
sub = NULL;
} else {
stream->name = g_strdup ("");
}
GST_DEBUG_OBJECT (avi, "stream name: %s", stream->name);
break;
default:
if (tag == GST_MAKE_FOURCC ('i', 'n', 'd', 'x') ||
tag == GST_MAKE_FOURCC ('i', 'x', '0' + avi->num_streams / 10,
'0' + avi->num_streams % 10)) {
g_free (stream->indexes);
gst_avi_demux_parse_superindex (avi, sub, &stream->indexes);
stream->superindex = TRUE;
sub = NULL;
break;
}
GST_WARNING_OBJECT (avi,
"Unknown stream header tag %" GST_FOURCC_FORMAT ", ignoring",
GST_FOURCC_ARGS (tag));
/* fall-through */
case GST_RIFF_TAG_JUNK:
break;
}
if (sub != NULL) {
gst_buffer_unref (sub);
sub = NULL;
}
}
if (!got_strh) {
GST_WARNING_OBJECT (avi, "Failed to find strh chunk");
goto fail;
}
if (!got_strf) {
GST_WARNING_OBJECT (avi, "Failed to find strf chunk");
goto fail;
}
/* get class to figure out the template */
klass = GST_ELEMENT_GET_CLASS (avi);
/* we now have all info, let´s set up a pad and a caps and be done */
/* create stream name + pad */
switch (stream->strh->type) {
case GST_RIFF_FCC_vids:{
guint32 fourcc;
fourcc = (stream->strf.vids->compression) ?
stream->strf.vids->compression : stream->strh->fcc_handler;
padname = g_strdup_printf ("video_%02d", avi->num_v_streams);
templ = gst_element_class_get_pad_template (klass, "video_%02d");
caps = gst_riff_create_video_caps (fourcc, stream->strh,
stream->strf.vids, stream->extradata, stream->initdata, &codec_name);
if (!caps) {
caps = gst_caps_new_simple ("video/x-avi-unknown", "fourcc",
GST_TYPE_FOURCC, fourcc, NULL);
} else if (got_vprp && vprp) {
guint32 aspect_n, aspect_d;
gint n, d;
aspect_n = vprp->aspect >> 16;
aspect_d = vprp->aspect & 0xffff;
/* calculate the pixel aspect ratio using w/h and aspect ratio */
n = aspect_n * stream->strf.vids->height;
d = aspect_d * stream->strf.vids->width;
if (n && d)
gst_caps_set_simple (caps, "pixel-aspect-ratio", GST_TYPE_FRACTION,
n, d, NULL);
/* very local, not needed elsewhere */
g_free (vprp);
vprp = NULL;
}
tag_name = GST_TAG_VIDEO_CODEC;
avi->num_v_streams++;
break;
}
case GST_RIFF_FCC_auds:{
padname = g_strdup_printf ("audio_%02d", avi->num_a_streams);
templ = gst_element_class_get_pad_template (klass, "audio_%02d");
caps = gst_riff_create_audio_caps (stream->strf.auds->format,
stream->strh, stream->strf.auds, stream->extradata,
stream->initdata, &codec_name);
if (!caps) {
caps = gst_caps_new_simple ("audio/x-avi-unknown", "codec_id",
G_TYPE_INT, stream->strf.auds->format, NULL);
}
tag_name = GST_TAG_AUDIO_CODEC;
avi->num_a_streams++;
break;
}
case GST_RIFF_FCC_iavs:{
guint32 fourcc = stream->strh->fcc_handler;
padname = g_strdup_printf ("video_%02d", avi->num_v_streams);
templ = gst_element_class_get_pad_template (klass, "video_%02d");
caps = gst_riff_create_iavs_caps (fourcc, stream->strh,
stream->strf.iavs, stream->extradata, stream->initdata, &codec_name);
if (!caps) {
caps = gst_caps_new_simple ("video/x-avi-unknown", "fourcc",
GST_TYPE_FOURCC, fourcc, NULL);
}
tag_name = GST_TAG_VIDEO_CODEC;
avi->num_v_streams++;
break;
}
case GST_RIFF_FCC_txts:{
padname = g_strdup_printf ("subtitle_%02d", avi->num_t_streams);
templ = gst_element_class_get_pad_template (klass, "subtitle_%02d");
caps = gst_caps_new_simple ("application/x-subtitle-avi", NULL);
tag_name = NULL;
avi->num_t_streams++;
break;
}
default:
g_assert_not_reached ();
}
/* no caps means no stream */
if (!caps) {
GST_ERROR_OBJECT (element, "Did not find caps for stream %s", padname);
goto fail;
}
GST_DEBUG_OBJECT (element, "codec-name=%s",
(codec_name ? codec_name : "NULL"));
GST_DEBUG_OBJECT (element, "caps=%" GST_PTR_FORMAT, caps);
/* set proper settings and add it */
if (stream->pad)
gst_object_unref (stream->pad);
pad = stream->pad = gst_pad_new_from_template (templ, padname);
g_free (padname);
gst_pad_use_fixed_caps (pad);
#if 0
gst_pad_set_formats_function (pad,
GST_DEBUG_FUNCPTR (gst_avi_demux_get_src_formats));
gst_pad_set_event_mask_function (pad,
GST_DEBUG_FUNCPTR (gst_avi_demux_get_event_mask));
#endif
gst_pad_set_event_function (pad,
GST_DEBUG_FUNCPTR (gst_avi_demux_handle_src_event));
gst_pad_set_query_type_function (pad,
GST_DEBUG_FUNCPTR (gst_avi_demux_get_src_query_types));
gst_pad_set_query_function (pad,
GST_DEBUG_FUNCPTR (gst_avi_demux_handle_src_query));
#if 0
gst_pad_set_convert_function (pad,
GST_DEBUG_FUNCPTR (gst_avi_demux_src_convert));
#endif
if (avi->element_index)
gst_index_get_writer_id (avi->element_index, GST_OBJECT (stream->pad),
&stream->index_id);
stream->num = avi->num_streams;
stream->start_entry = 0;
stream->step_entry = 0;
stream->stop_entry = 0;
stream->current_entry = -1;
stream->current_total = 0;
stream->last_flow = GST_FLOW_OK;
stream->discont = TRUE;
stream->total_bytes = 0;
stream->total_blocks = 0;
stream->n_keyframes = 0;
stream->idx_n = 0;
stream->idx_max = 0;
gst_pad_set_element_private (pad, stream);
avi->num_streams++;
gst_pad_set_caps (pad, caps);
gst_pad_set_active (pad, TRUE);
gst_caps_unref (caps);
/* make tags */
if (codec_name) {
if (!stream->taglist)
stream->taglist = gst_tag_list_new ();
avi->got_tags = TRUE;
gst_tag_list_add (stream->taglist, GST_TAG_MERGE_APPEND, tag_name,
codec_name, NULL);
g_free (codec_name);
}
gst_buffer_unref (buf);
return TRUE;
/* ERRORS */
fail:
{
/* unref any mem that may be in use */
if (buf)
gst_buffer_unref (buf);
if (sub)
gst_buffer_unref (sub);
g_free (vprp);
g_free (codec_name);
gst_avi_demux_reset_stream (avi, stream);
avi->num_streams++;
return FALSE;
}
}
/*
* gst_avi_demux_parse_odml:
* @avi: calling element (used for debug/error).
* @buf: input buffer to be used for parsing.
*
* Read an openDML-2.0 extension header. Fills in the frame number
* in the avi demuxer object when reading succeeds.
*/
static void
gst_avi_demux_parse_odml (GstAviDemux * avi, GstBuffer * buf)
{
guint32 tag = 0;
guint offset = 4;
GstBuffer *sub = NULL;
while (gst_riff_parse_chunk (GST_ELEMENT_CAST (avi), buf, &offset, &tag,
&sub)) {
switch (tag) {
case GST_RIFF_TAG_dmlh:{
gst_riff_dmlh dmlh, *_dmlh;
guint size;
/* sub == NULL is possible and means an empty buffer */
size = sub ? GST_BUFFER_SIZE (sub) : 0;
/* check size */
if (size < sizeof (gst_riff_dmlh)) {
GST_ERROR_OBJECT (avi,
"DMLH entry is too small (%d bytes, %d needed)",
size, (int) sizeof (gst_riff_dmlh));
goto next;
}
_dmlh = (gst_riff_dmlh *) GST_BUFFER_DATA (sub);
dmlh.totalframes = GST_READ_UINT32_LE (&_dmlh->totalframes);
GST_INFO_OBJECT (avi, "dmlh tag found: totalframes: %u",
dmlh.totalframes);
avi->avih->tot_frames = dmlh.totalframes;
goto next;
}
default:
GST_WARNING_OBJECT (avi,
"Unknown tag %" GST_FOURCC_FORMAT " in ODML header",
GST_FOURCC_ARGS (tag));
/* fall-through */
case GST_RIFF_TAG_JUNK:
next:
/* skip and move to next chunk */
if (sub) {
gst_buffer_unref (sub);
sub = NULL;
}
break;
}
}
if (buf)
gst_buffer_unref (buf);
}
/* Index helper */
static guint
gst_avi_demux_index_last (GstAviDemux * avi, GstAviStream * stream)
{
return stream->idx_n - 1;
}
/* find a previous entry in the index with the given flags */
static guint
gst_avi_demux_index_prev (GstAviDemux * avi, GstAviStream * stream,
guint last, gboolean keyframe)
{
GstAviIndexEntry *entry;
guint i;
for (i = last; i > 0; i--) {
entry = &stream->index[i - 1];
if (!keyframe || ENTRY_IS_KEYFRAME (entry)) {
return i - 1;
}
}
return 0;
}
static guint
gst_avi_demux_index_next (GstAviDemux * avi, GstAviStream * stream,
guint last, gboolean keyframe)
{
GstAviIndexEntry *entry;
gint i;
for (i = last + 1; i < stream->idx_n; i++) {
entry = &stream->index[i];
if (!keyframe || ENTRY_IS_KEYFRAME (entry)) {
return i;
}
}
return stream->idx_n - 1;
}
static guint
gst_avi_demux_index_entry_search (GstAviIndexEntry * entry, guint64 * total)
{
if (entry->total < *total)
return -1;
else if (entry->total > *total)
return 1;
return 0;
}
/*
* gst_avi_demux_index_for_time:
* @avi: Avi object
* @stream: the stream
* @time: a time position
*
* Finds the index entry which time is less or equal than the requested time.
* Try to avoid binary search when we can convert the time to an index
* position directly (for example for video frames with a fixed duration).
*
* Returns: the found position in the index.
*/
static guint
gst_avi_demux_index_for_time (GstAviDemux * avi,
GstAviStream * stream, guint64 time)
{
guint index = -1;
guint64 total;
GST_LOG_OBJECT (avi, "search time:%" GST_TIME_FORMAT, GST_TIME_ARGS (time));
/* easy (and common) cases */
if (time == 0 || stream->idx_n == 0)
return 0;
if (time >= stream->idx_duration)
return stream->idx_n - 1;
/* figure out where we need to go. For that we convert the time to an
* index entry or we convert it to a total and then do a binary search. */
if (stream->is_vbr) {
/* VBR stream next timestamp */
if (stream->strh->type == GST_RIFF_FCC_auds) {
total = avi_stream_convert_time_to_frames_unchecked (stream, time);
} else {
index = avi_stream_convert_time_to_frames_unchecked (stream, time);
}
} else {
/* constant rate stream */
total = avi_stream_convert_time_to_bytes_unchecked (stream, time);
}
if (index == -1) {
GstAviIndexEntry *entry;
/* no index, find index with binary search on total */
GST_LOG_OBJECT (avi, "binary search for entry with total %"
G_GUINT64_FORMAT, total);
entry = gst_util_array_binary_search (stream->index,
stream->idx_n, sizeof (GstAviIndexEntry),
(GCompareDataFunc) gst_avi_demux_index_entry_search,
GST_SEARCH_MODE_BEFORE, &total, NULL);
if (entry == NULL) {
GST_LOG_OBJECT (avi, "not found, assume index 0");
index = 0;
} else {
index = entry - stream->index;
GST_LOG_OBJECT (avi, "found at %u", index);
}
} else {
GST_LOG_OBJECT (avi, "converted time to index %u", index);
}
return index;
}
static inline GstAviStream *
gst_avi_demux_stream_for_id (GstAviDemux * avi, guint32 id)
{
guint stream_nr;
GstAviStream *stream;
/* get the stream for this entry */
stream_nr = CHUNKID_TO_STREAMNR (id);
if (G_UNLIKELY (stream_nr >= avi->num_streams)) {
GST_WARNING_OBJECT (avi, "invalid stream nr %d", stream_nr);
return NULL;
}
stream = &avi->stream[stream_nr];
if (G_UNLIKELY (!stream->strh)) {
GST_WARNING_OBJECT (avi, "Unhandled stream %d, skipping", stream_nr);
return NULL;
}
return stream;
}
/*
* gst_avi_demux_parse_index:
* @avi: calling element (used for debugging/errors).
* @buf: buffer containing the full index.
*
* Read index entries from the provided buffer.
* The buffer should contain a GST_RIFF_TAG_idx1 chunk.
*/
static gboolean
gst_avi_demux_parse_index (GstAviDemux * avi, GstBuffer * buf)
{
guint64 pos_before;
guint8 *data;
guint size;
guint i, num, n;
gst_riff_index_entry *index;
GstClockTime stamp;
GstAviStream *stream;
GstAviIndexEntry entry;
guint32 id;
if (!buf)
return FALSE;
data = GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf);
stamp = gst_util_get_timestamp ();
/* see how many items in the index */
num = size / sizeof (gst_riff_index_entry);
if (num == 0)
goto empty_list;
GST_INFO_OBJECT (avi, "Parsing index, nr_entries = %6d", num);
index = (gst_riff_index_entry *) data;
pos_before = avi->offset;
/* figure out if the index is 0 based or relative to the MOVI start */
entry.offset = GST_READ_UINT32_LE (&index[0].offset);
if (entry.offset < avi->offset) {
avi->index_offset = avi->offset + 8;
GST_DEBUG ("index_offset = %" G_GUINT64_FORMAT, avi->index_offset);
} else {
avi->index_offset = 0;
GST_DEBUG ("index is 0 based");
}
for (i = 0, n = 0; i < num; i++) {
id = GST_READ_UINT32_LE (&index[i].id);
entry.offset = GST_READ_UINT32_LE (&index[i].offset);
/* some sanity checks */
if (G_UNLIKELY (id == GST_RIFF_rec || id == 0 ||
(entry.offset == 0 && n > 0)))
continue;
/* get the stream for this entry */
stream = gst_avi_demux_stream_for_id (avi, id);
if (G_UNLIKELY (!stream))
continue;
/* handle offset and size */
entry.offset += avi->index_offset + 8;
entry.size = GST_READ_UINT32_LE (&index[i].size);
/* handle flags */
if (stream->strh->type == GST_RIFF_FCC_auds) {
/* all audio frames are keyframes */
ENTRY_SET_KEYFRAME (&entry);
} else {
guint32 flags;
/* else read flags */
flags = GST_READ_UINT32_LE (&index[i].flags);
if (flags & GST_RIFF_IF_KEYFRAME) {
ENTRY_SET_KEYFRAME (&entry);
} else {
ENTRY_UNSET_KEYFRAME (&entry);
}
}
/* and add */
if (G_UNLIKELY (!gst_avi_demux_add_index (avi, stream, num, &entry)))
goto out_of_mem;
n++;
}
gst_buffer_unref (buf);
/* get stream stats now */
avi->have_index = gst_avi_demux_do_index_stats (avi);
stamp = gst_util_get_timestamp () - stamp;
GST_DEBUG_OBJECT (avi, "parsing index %" GST_TIME_FORMAT,
GST_TIME_ARGS (stamp));
return TRUE;
/* ERRORS */
empty_list:
{
GST_DEBUG_OBJECT (avi, "empty index");
gst_buffer_unref (buf);
return FALSE;
}
out_of_mem:
{
GST_ELEMENT_ERROR (avi, RESOURCE, NO_SPACE_LEFT, (NULL),
("Cannot allocate memory for %u*%u=%u bytes",
(guint) sizeof (GstAviIndexEntry), num,
(guint) sizeof (GstAviIndexEntry) * num));
gst_buffer_unref (buf);
return FALSE;
}
}
/*
* gst_avi_demux_stream_index:
* @avi: avi demuxer object.
*
* Seeks to index and reads it.
*/
static void
gst_avi_demux_stream_index (GstAviDemux * avi)
{
GstFlowReturn res;
guint64 offset = avi->offset;
GstBuffer *buf;
guint32 tag;
guint32 size;
GST_DEBUG ("demux stream index at offset %" G_GUINT64_FORMAT, offset);
/* get chunk information */
res = gst_pad_pull_range (avi->sinkpad, offset, 8, &buf);
if (res != GST_FLOW_OK)
goto pull_failed;
else if (GST_BUFFER_SIZE (buf) < 8)
goto too_small;
/* check tag first before blindy trying to read 'size' bytes */
tag = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf));
size = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf) + 4);
if (tag == GST_RIFF_TAG_LIST) {
/* this is the movi tag */
GST_DEBUG_OBJECT (avi, "skip LIST chunk, size %" G_GUINT32_FORMAT,
(8 + GST_ROUND_UP_2 (size)));
offset += 8 + GST_ROUND_UP_2 (size);
gst_buffer_unref (buf);
res = gst_pad_pull_range (avi->sinkpad, offset, 8, &buf);
if (res != GST_FLOW_OK)
goto pull_failed;
else if (GST_BUFFER_SIZE (buf) < 8)
goto too_small;
tag = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf));
size = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf) + 4);
}
if (tag != GST_RIFF_TAG_idx1)
goto no_index;
if (!size)
goto zero_index;
gst_buffer_unref (buf);
GST_DEBUG ("index found at offset %" G_GUINT64_FORMAT, offset);
/* read chunk, advance offset */
if (gst_riff_read_chunk (GST_ELEMENT_CAST (avi),
avi->sinkpad, &offset, &tag, &buf) != GST_FLOW_OK)
return;
GST_DEBUG ("will parse index chunk size %u for tag %"
GST_FOURCC_FORMAT, GST_BUFFER_SIZE (buf), GST_FOURCC_ARGS (tag));
gst_avi_demux_parse_index (avi, buf);
#ifndef GST_DISABLE_GST_DEBUG
/* debug our indexes */
{
gint i;
GstAviStream *stream;
for (i = 0; i < avi->num_streams; i++) {
stream = &avi->stream[i];
GST_DEBUG_OBJECT (avi, "stream %u: %u frames, %" G_GINT64_FORMAT " bytes",
i, stream->idx_n, stream->total_bytes);
}
}
#endif
return;
/* ERRORS */
pull_failed:
{
GST_DEBUG_OBJECT (avi,
"pull range failed: pos=%" G_GUINT64_FORMAT " size=8", offset);
return;
}
too_small:
{
GST_DEBUG_OBJECT (avi, "Buffer is too small");
gst_buffer_unref (buf);
return;
}
no_index:
{
GST_WARNING_OBJECT (avi,
"No index data (idx1) after movi chunk, but %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (tag));
gst_buffer_unref (buf);
return;
}
zero_index:
{
GST_WARNING_OBJECT (avi, "Empty index data (idx1) after movi chunk");
gst_buffer_unref (buf);
return;
}
}
/*
* gst_avi_demux_peek_tag:
*
* Returns the tag and size of the next chunk
*/
static GstFlowReturn
gst_avi_demux_peek_tag (GstAviDemux * avi, guint64 offset, guint32 * tag,
guint * size)
{
GstFlowReturn res = GST_FLOW_OK;
GstBuffer *buf = NULL;
guint bufsize;
guint8 *bufdata;
res = gst_pad_pull_range (avi->sinkpad, offset, 8, &buf);
if (res != GST_FLOW_OK)
goto pull_failed;
bufsize = GST_BUFFER_SIZE (buf);
if (bufsize != 8)
goto wrong_size;
bufdata = GST_BUFFER_DATA (buf);
*tag = GST_READ_UINT32_LE (bufdata);
*size = GST_READ_UINT32_LE (bufdata + 4);
GST_LOG_OBJECT (avi, "Tag[%" GST_FOURCC_FORMAT "] (size:%d) %"
G_GINT64_FORMAT " -- %" G_GINT64_FORMAT, GST_FOURCC_ARGS (*tag),
*size, offset + 8, offset + 8 + (gint64) * size);
done:
gst_buffer_unref (buf);
return res;
/* ERRORS */
pull_failed:
{
GST_DEBUG_OBJECT (avi, "pull_ranged returned %s", gst_flow_get_name (res));
return res;
}
wrong_size:
{
GST_DEBUG_OBJECT (avi, "got %d bytes which is <> 8 bytes", bufsize);
res = GST_FLOW_ERROR;
goto done;
}
}
/*
* gst_avi_demux_next_data_buffer:
*
* Returns the offset and size of the next buffer
* Position is the position of the buffer (after tag and size)
*/
static GstFlowReturn
gst_avi_demux_next_data_buffer (GstAviDemux * avi, guint64 * offset,
guint32 * tag, guint * size)
{
guint64 off = *offset;
guint _size = 0;
GstFlowReturn res;
do {
res = gst_avi_demux_peek_tag (avi, off, tag, &_size);
if (res != GST_FLOW_OK)
break;
if (*tag == GST_RIFF_TAG_LIST || *tag == GST_RIFF_TAG_RIFF)
off += 8 + 4; /* skip tag + size + subtag */
else {
*offset = off + 8;
*size = _size;
break;
}
} while (TRUE);
return res;
}
/*
* gst_avi_demux_stream_scan:
* @avi: calling element (used for debugging/errors).
*
* Scan the file for all chunks to "create" a new index.
* pull-range based
*/
static gboolean
gst_avi_demux_stream_scan (GstAviDemux * avi)
{
GstFlowReturn res;
GstAviStream *stream;
GstFormat format;
guint64 pos = 0;
guint64 length;
gint64 tmplength;
guint32 tag = 0;
guint num;
/* FIXME:
* - implement non-seekable source support.
*/
GST_DEBUG_OBJECT (avi, "Creating index");
/* get the size of the file */
format = GST_FORMAT_BYTES;
if (!gst_pad_query_peer_duration (avi->sinkpad, &format, &tmplength))
return FALSE;
length = tmplength;
/* guess the total amount of entries we expect */
num = 16000;
while (TRUE) {
GstAviIndexEntry entry;
guint size = 0;
/* start reading data buffers to find the id and offset */
res = gst_avi_demux_next_data_buffer (avi, &pos, &tag, &size);
if (G_UNLIKELY (res != GST_FLOW_OK))
break;
/* get stream */
stream = gst_avi_demux_stream_for_id (avi, tag);
if (G_UNLIKELY (!stream))
goto next;
/* we can't figure out the keyframes, assume they all are */
entry.flags = GST_AVI_KEYFRAME;
entry.offset = pos;
entry.size = size;
/* and add to the index of this stream */
if (G_UNLIKELY (!gst_avi_demux_add_index (avi, stream, num, &entry)))
goto out_of_mem;
next:
/* update position */
pos += GST_ROUND_UP_2 (size);
if (G_UNLIKELY (pos > length)) {
GST_WARNING_OBJECT (avi,
"Stopping index lookup since we are further than EOF");
break;
}
}
/* collect stats */
avi->have_index = gst_avi_demux_do_index_stats (avi);
return TRUE;
/* ERRORS */
out_of_mem:
{
GST_ELEMENT_ERROR (avi, RESOURCE, NO_SPACE_LEFT, (NULL),
("Cannot allocate memory for %u*%u=%u bytes",
(guint) sizeof (GstAviIndexEntry), num,
(guint) sizeof (GstAviIndexEntry) * num));
return FALSE;
}
}
static void
gst_avi_demux_calculate_durations_from_index (GstAviDemux * avi)
{
guint i;
GstClockTime total;
GstAviStream *stream;
total = GST_CLOCK_TIME_NONE;
/* all streams start at a timestamp 0 */
for (i = 0; i < avi->num_streams; i++) {
GstClockTime duration, hduration;
gst_riff_strh *strh;
stream = &avi->stream[i];
if (G_UNLIKELY (!stream || !stream->idx_n || !(strh = stream->strh)))
continue;
/* get header duration for the stream */
hduration = stream->hdr_duration;
/* index duration calculated during parsing */
duration = stream->idx_duration;
/* now pick a good duration */
if (GST_CLOCK_TIME_IS_VALID (duration)) {
/* index gave valid duration, use that */
GST_INFO ("Stream %p duration according to index: %" GST_TIME_FORMAT,
stream, GST_TIME_ARGS (duration));
} else {
/* fall back to header info to calculate a duration */
duration = hduration;
}
GST_INFO ("Setting duration of stream #%d to %" GST_TIME_FORMAT,
i, GST_TIME_ARGS (duration));
/* set duration for the stream */
stream->duration = duration;
/* find total duration */
if (total == GST_CLOCK_TIME_NONE ||
(GST_CLOCK_TIME_IS_VALID (duration) && duration > total))
total = duration;
}
if (GST_CLOCK_TIME_IS_VALID (total) && (total > 0)) {
/* now update the duration for those streams where we had none */
for (i = 0; i < avi->num_streams; i++) {
stream = &avi->stream[i];
if (!GST_CLOCK_TIME_IS_VALID (stream->duration)
|| stream->duration == 0) {
stream->duration = total;
GST_INFO ("Stream %p duration according to total: %" GST_TIME_FORMAT,
stream, GST_TIME_ARGS (total));
}
}
}
/* and set the total duration in the segment. */
GST_INFO ("Setting total duration to: %" GST_TIME_FORMAT,
GST_TIME_ARGS (total));
gst_segment_set_duration (&avi->segment, GST_FORMAT_TIME, total);
}
/* returns FALSE if there are no pads to deliver event to,
* otherwise TRUE (whatever the outcome of event sending),
* takes ownership of the event. */
static gboolean
gst_avi_demux_push_event (GstAviDemux * avi, GstEvent * event)
{
gboolean result = FALSE;
gint i;
GST_DEBUG_OBJECT (avi, "sending %s event to %d streams",
GST_EVENT_TYPE_NAME (event), avi->num_streams);
for (i = 0; i < avi->num_streams; i++) {
GstAviStream *stream = &avi->stream[i];
if (stream->pad) {
result = TRUE;
gst_pad_push_event (stream->pad, gst_event_ref (event));
}
}
gst_event_unref (event);
return result;
}
static void
gst_avi_demux_check_seekability (GstAviDemux * avi)
{
GstQuery *query;
gboolean seekable = FALSE;
gint64 start = -1, stop = -1;
query = gst_query_new_seeking (GST_FORMAT_BYTES);
if (!gst_pad_peer_query (avi->sinkpad, query)) {
GST_DEBUG_OBJECT (avi, "seeking query failed");
goto done;
}
gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
/* try harder to query upstream size if we didn't get it the first time */
if (seekable && stop == -1) {
GstFormat fmt = GST_FORMAT_BYTES;
GST_DEBUG_OBJECT (avi, "doing duration query to fix up unset stop");
gst_pad_query_peer_duration (avi->sinkpad, &fmt, &stop);
}
/* if upstream doesn't know the size, it's likely that it's not seekable in
* practice even if it technically may be seekable */
if (seekable && (start != 0 || stop <= start)) {
GST_DEBUG_OBJECT (avi, "seekable but unknown start/stop -> disable");
seekable = FALSE;
}
if (!avi->element_index) {
GST_DEBUG_OBJECT (avi, "no index");
seekable = FALSE;
}
done:
GST_INFO_OBJECT (avi, "seekable: %d (%" G_GUINT64_FORMAT " - %"
G_GUINT64_FORMAT ")", seekable, start, stop);
avi->seekable = seekable;
gst_query_unref (query);
}
/*
* Read AVI headers when streaming
*/
static GstFlowReturn
gst_avi_demux_stream_header_push (GstAviDemux * avi)
{
GstFlowReturn ret = GST_FLOW_OK;
guint32 tag = 0;
guint32 ltag = 0;
guint32 size = 0;
const guint8 *data;
GstBuffer *buf = NULL, *sub = NULL;
guint offset = 4;
gint64 stop;
GST_DEBUG ("Reading and parsing avi headers: %d", avi->header_state);
switch (avi->header_state) {
case GST_AVI_DEMUX_HEADER_TAG_LIST:
if (gst_avi_demux_peek_chunk (avi, &tag, &size)) {
avi->offset += 8 + GST_ROUND_UP_2 (size);
if (tag != GST_RIFF_TAG_LIST)
goto header_no_list;
gst_adapter_flush (avi->adapter, 8);
/* Find the 'hdrl' LIST tag */
GST_DEBUG ("Reading %d bytes", size);
buf = gst_adapter_take_buffer (avi->adapter, size);
if (GST_READ_UINT32_LE (GST_BUFFER_DATA (buf)) != GST_RIFF_LIST_hdrl)
goto header_no_hdrl;
/* mind padding */
if (size & 1)
gst_adapter_flush (avi->adapter, 1);
GST_DEBUG ("'hdrl' LIST tag found. Parsing next chunk");
/* the hdrl starts with a 'avih' header */
if (!gst_riff_parse_chunk (GST_ELEMENT (avi), buf, &offset, &tag, &sub))
goto header_no_avih;
if (tag != GST_RIFF_TAG_avih)
goto header_no_avih;
if (!gst_avi_demux_parse_avih (GST_ELEMENT (avi), sub, &avi->avih))
goto header_wrong_avih;
GST_DEBUG_OBJECT (avi, "AVI header ok, reading elemnts from header");
/* now, read the elements from the header until the end */
while (gst_riff_parse_chunk (GST_ELEMENT (avi), buf, &offset, &tag,
&sub)) {
/* sub can be NULL on empty tags */
if (!sub)
continue;
switch (tag) {
case GST_RIFF_TAG_LIST:
if (GST_BUFFER_SIZE (sub) < 4)
goto next;
switch (GST_READ_UINT32_LE (GST_BUFFER_DATA (sub))) {
case GST_RIFF_LIST_strl:
if (!(gst_avi_demux_parse_stream (avi, sub))) {
sub = NULL;
GST_ELEMENT_WARNING (avi, STREAM, DEMUX, (NULL),
("failed to parse stream, ignoring"));
goto next;
}
sub = NULL;
goto next;
case GST_RIFF_LIST_odml:
gst_avi_demux_parse_odml (avi, sub);
sub = NULL;
break;
default:
GST_WARNING_OBJECT (avi,
"Unknown list %" GST_FOURCC_FORMAT " in AVI header",
GST_FOURCC_ARGS (GST_READ_UINT32_LE (GST_BUFFER_DATA
(sub))));
/* fall-through */
case GST_RIFF_TAG_JUNK:
goto next;
}
break;
default:
GST_WARNING_OBJECT (avi,
"Unknown off %d tag %" GST_FOURCC_FORMAT " in AVI header",
offset, GST_FOURCC_ARGS (tag));
/* fall-through */
case GST_RIFF_TAG_JUNK:
next:
/* move to next chunk */
if (sub)
gst_buffer_unref (sub);
sub = NULL;
break;
}
}
gst_buffer_unref (buf);
GST_DEBUG ("elements parsed");
/* check parsed streams */
if (avi->num_streams == 0) {
goto no_streams;
} else if (avi->num_streams != avi->avih->streams) {
GST_WARNING_OBJECT (avi,
"Stream header mentioned %d streams, but %d available",
avi->avih->streams, avi->num_streams);
}
GST_DEBUG ("Get junk and info next");
avi->header_state = GST_AVI_DEMUX_HEADER_INFO;
} else {
/* Need more data */
return ret;
}
/* fall-though */
case GST_AVI_DEMUX_HEADER_INFO:
GST_DEBUG_OBJECT (avi, "skipping junk between header and data ...");
while (TRUE) {
if (gst_adapter_available (avi->adapter) < 12)
return GST_FLOW_OK;
data = gst_adapter_peek (avi->adapter, 12);
tag = GST_READ_UINT32_LE (data);
size = GST_READ_UINT32_LE (data + 4);
ltag = GST_READ_UINT32_LE (data + 8);
if (tag == GST_RIFF_TAG_LIST) {
switch (ltag) {
case GST_RIFF_LIST_movi:
gst_adapter_flush (avi->adapter, 12);
avi->offset += 12;
goto skipping_done;
case GST_RIFF_LIST_INFO:
GST_DEBUG ("Found INFO chunk");
if (gst_avi_demux_peek_chunk (avi, &tag, &size)) {
GST_DEBUG ("got size %d", size);
avi->offset += 12;
gst_adapter_flush (avi->adapter, 12);
if (size > 4) {
buf = gst_adapter_take_buffer (avi->adapter, size - 4);
/* mind padding */
if (size & 1)
gst_adapter_flush (avi->adapter, 1);
gst_riff_parse_info (GST_ELEMENT (avi), buf,
&avi->globaltags);
gst_buffer_unref (buf);
avi->offset += GST_ROUND_UP_2 (size) - 4;
} else {
GST_DEBUG ("skipping INFO LIST prefix");
}
} else {
/* Need more data */
return GST_FLOW_OK;
}
break;
default:
if (gst_avi_demux_peek_chunk (avi, &tag, &size)) {
avi->offset += 8 + GST_ROUND_UP_2 (size);
gst_adapter_flush (avi->adapter, 8 + GST_ROUND_UP_2 (size));
// ??? goto iterate; ???
} else {
/* Need more data */
return GST_FLOW_OK;
}
break;
}
} else {
if (gst_avi_demux_peek_chunk (avi, &tag, &size)) {
avi->offset += 8 + GST_ROUND_UP_2 (size);
gst_adapter_flush (avi->adapter, 8 + GST_ROUND_UP_2 (size));
//goto iterate;
} else {
/* Need more data */
return GST_FLOW_OK;
}
}
}
break;
default:
GST_WARNING ("unhandled header state: %d", avi->header_state);
break;
}
skipping_done:
GST_DEBUG_OBJECT (avi, "skipping done ... (streams=%u, stream[0].indexes=%p)",
avi->num_streams, avi->stream[0].indexes);
GST_DEBUG ("Found movi chunk. Starting to stream data");
avi->state = GST_AVI_DEMUX_MOVI;
/* no indexes in push mode, but it still sets some variables */
gst_avi_demux_calculate_durations_from_index (avi);
gst_avi_demux_expose_streams (avi, TRUE);
/* create initial NEWSEGMENT event */
if ((stop = avi->segment.stop) == GST_CLOCK_TIME_NONE)
stop = avi->segment.duration;
GST_DEBUG_OBJECT (avi, "segment stop %" G_GINT64_FORMAT, stop);
if (avi->seek_event)
gst_event_unref (avi->seek_event);
avi->seek_event = gst_event_new_new_segment_full
(FALSE, avi->segment.rate, avi->segment.applied_rate, GST_FORMAT_TIME,
avi->segment.start, stop, avi->segment.time);
gst_avi_demux_check_seekability (avi);
/* at this point we know all the streams and we can signal the no more
* pads signal */
GST_DEBUG_OBJECT (avi, "signaling no more pads");
gst_element_no_more_pads (GST_ELEMENT (avi));
return GST_FLOW_OK;
/* ERRORS */
no_streams:
{
GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("No streams found"));
return GST_FLOW_ERROR;
}
header_no_list:
{
GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
("Invalid AVI header (no LIST at start): %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag)));
return GST_FLOW_ERROR;
}
header_no_hdrl:
{
GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
("Invalid AVI header (no hdrl at start): %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag)));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
header_no_avih:
{
GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
("Invalid AVI header (no avih at start): %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag)));
if (sub)
gst_buffer_unref (sub);
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
header_wrong_avih:
{
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
}
/*
* Read full AVI headers.
*/
static GstFlowReturn
gst_avi_demux_stream_header_pull (GstAviDemux * avi)
{
GstFlowReturn res;
GstBuffer *buf, *sub = NULL;
guint32 tag;
guint offset = 4;
gint64 stop;
GstElement *element = GST_ELEMENT_CAST (avi);
GstClockTime stamp;
stamp = gst_util_get_timestamp ();
/* the header consists of a 'hdrl' LIST tag */
res = gst_riff_read_chunk (element, avi->sinkpad, &avi->offset, &tag, &buf);
if (res != GST_FLOW_OK)
goto pull_range_failed;
else if (tag != GST_RIFF_TAG_LIST)
goto no_list;
else if (GST_BUFFER_SIZE (buf) < 4)
goto no_header;
GST_DEBUG_OBJECT (avi, "parsing headers");
/* Find the 'hdrl' LIST tag */
while (GST_READ_UINT32_LE (GST_BUFFER_DATA (buf)) != GST_RIFF_LIST_hdrl) {
GST_LOG_OBJECT (avi, "buffer contains %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (GST_READ_UINT32_LE (GST_BUFFER_DATA (buf))));
/* Eat up */
gst_buffer_unref (buf);
/* read new chunk */
res = gst_riff_read_chunk (element, avi->sinkpad, &avi->offset, &tag, &buf);
if (res != GST_FLOW_OK)
goto pull_range_failed;
else if (tag != GST_RIFF_TAG_LIST)
goto no_list;
else if (GST_BUFFER_SIZE (buf) < 4)
goto no_header;
}
GST_DEBUG_OBJECT (avi, "hdrl LIST tag found");
/* the hdrl starts with a 'avih' header */
if (!gst_riff_parse_chunk (element, buf, &offset, &tag, &sub))
goto no_avih;
else if (tag != GST_RIFF_TAG_avih)
goto no_avih;
else if (!gst_avi_demux_parse_avih (element, sub, &avi->avih))
goto invalid_avih;
GST_DEBUG_OBJECT (avi, "AVI header ok, reading elements from header");
/* now, read the elements from the header until the end */
while (gst_riff_parse_chunk (element, buf, &offset, &tag, &sub)) {
/* sub can be NULL on empty tags */
if (!sub)
continue;
switch (tag) {
case GST_RIFF_TAG_LIST:
{
guint8 *data;
guint32 fourcc;
if (GST_BUFFER_SIZE (sub) < 4)
goto next;
data = GST_BUFFER_DATA (sub);
fourcc = GST_READ_UINT32_LE (data);
switch (fourcc) {
case GST_RIFF_LIST_strl:
if (!(gst_avi_demux_parse_stream (avi, sub))) {
GST_ELEMENT_WARNING (avi, STREAM, DEMUX, (NULL),
("failed to parse stream, ignoring"));
sub = NULL;
}
sub = NULL;
goto next;
case GST_RIFF_LIST_odml:
gst_avi_demux_parse_odml (avi, sub);
sub = NULL;
break;
case GST_RIFF_LIST_INFO:
GST_BUFFER_DATA (sub) = data + 4;
GST_BUFFER_SIZE (sub) -= 4;
gst_riff_parse_info (element, sub, &avi->globaltags);
break;
default:
GST_WARNING_OBJECT (avi,
"Unknown list %" GST_FOURCC_FORMAT " in AVI header",
GST_FOURCC_ARGS (fourcc));
GST_MEMDUMP_OBJECT (avi, "Unknown list", GST_BUFFER_DATA (sub),
GST_BUFFER_SIZE (sub));
/* fall-through */
case GST_RIFF_TAG_JUNK:
goto next;
}
break;
}
default:
GST_WARNING_OBJECT (avi,
"Unknown tag %" GST_FOURCC_FORMAT " in AVI header at off %d",
GST_FOURCC_ARGS (tag), offset);
GST_MEMDUMP_OBJECT (avi, "Unknown tag", GST_BUFFER_DATA (sub),
GST_BUFFER_SIZE (sub));
/* fall-through */
case GST_RIFF_TAG_JUNK:
next:
if (sub)
gst_buffer_unref (sub);
sub = NULL;
break;
}
}
gst_buffer_unref (buf);
GST_DEBUG ("elements parsed");
/* check parsed streams */
if (avi->num_streams == 0)
goto no_streams;
else if (avi->num_streams != avi->avih->streams) {
GST_WARNING_OBJECT (avi,
"Stream header mentioned %d streams, but %d available",
avi->avih->streams, avi->num_streams);
}
GST_DEBUG_OBJECT (avi, "skipping junk between header and data, offset=%"
G_GUINT64_FORMAT, avi->offset);
/* Now, find the data (i.e. skip all junk between header and data) */
do {
guint size;
guint8 *data;
guint32 tag, ltag;
res = gst_pad_pull_range (avi->sinkpad, avi->offset, 12, &buf);
if (res != GST_FLOW_OK) {
GST_DEBUG_OBJECT (avi, "pull_range failure while looking for tags");
goto pull_range_failed;
} else if (GST_BUFFER_SIZE (buf) < 12) {
GST_DEBUG_OBJECT (avi, "got %d bytes which is less than 12 bytes",
GST_BUFFER_SIZE (buf));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
data = GST_BUFFER_DATA (buf);
tag = GST_READ_UINT32_LE (data);
size = GST_READ_UINT32_LE (data + 4);
ltag = GST_READ_UINT32_LE (data + 8);
GST_DEBUG ("tag %" GST_FOURCC_FORMAT ", size %u",
GST_FOURCC_ARGS (tag), size);
GST_MEMDUMP ("Tag content", data, GST_BUFFER_SIZE (buf));
gst_buffer_unref (buf);
switch (tag) {
case GST_RIFF_TAG_LIST:{
switch (ltag) {
case GST_RIFF_LIST_movi:
GST_DEBUG_OBJECT (avi,
"Reached the 'movi' tag, we're done with skipping");
goto skipping_done;
case GST_RIFF_LIST_INFO:
res =
gst_riff_read_chunk (element, avi->sinkpad, &avi->offset, &tag,
&buf);
if (res != GST_FLOW_OK) {
GST_DEBUG_OBJECT (avi, "couldn't read INFO chunk");
goto pull_range_failed;
}
GST_DEBUG ("got size %u", GST_BUFFER_SIZE (buf));
if (size < 4) {
GST_DEBUG ("skipping INFO LIST prefix");
avi->offset += (4 - GST_ROUND_UP_2 (size));
gst_buffer_unref (buf);
continue;
}
sub = gst_buffer_create_sub (buf, 4, GST_BUFFER_SIZE (buf) - 4);
gst_riff_parse_info (element, sub, &avi->globaltags);
if (sub) {
gst_buffer_unref (sub);
sub = NULL;
}
gst_buffer_unref (buf);
/* gst_riff_read_chunk() has already advanced avi->offset */
break;
default:
GST_WARNING_OBJECT (avi,
"Skipping unknown list tag %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (ltag));
avi->offset += 8 + GST_ROUND_UP_2 (size);
break;
}
}
break;
default:
GST_WARNING_OBJECT (avi, "Skipping unknown tag %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (tag));
/* Fall-through */
case GST_MAKE_FOURCC ('J', 'U', 'N', 'Q'):
case GST_MAKE_FOURCC ('J', 'U', 'N', 'K'):
/* Only get buffer for debugging if the memdump is needed */
if (gst_debug_category_get_threshold (GST_CAT_DEFAULT) >= 9) {
res = gst_pad_pull_range (avi->sinkpad, avi->offset, size, &buf);
if (res != GST_FLOW_OK) {
GST_DEBUG_OBJECT (avi, "couldn't read INFO chunk");
goto pull_range_failed;
}
GST_MEMDUMP ("Junk", GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
gst_buffer_unref (buf);
}
avi->offset += 8 + GST_ROUND_UP_2 (size);
break;
}
} while (1);
skipping_done:
GST_DEBUG_OBJECT (avi, "skipping done ... (streams=%u, stream[0].indexes=%p)",
avi->num_streams, avi->stream[0].indexes);
/* create or read stream index (for seeking) */
if (avi->stream[0].indexes != NULL) {
/* we read a super index already (gst_avi_demux_parse_superindex() ) */
gst_avi_demux_read_subindexes_pull (avi);
}
if (!avi->have_index) {
if (avi->avih->flags & GST_RIFF_AVIH_HASINDEX)
gst_avi_demux_stream_index (avi);
/* still no index, scan */
if (!avi->have_index) {
gst_avi_demux_stream_scan (avi);
/* still no index.. this is a fatal error for now.
* FIXME, we should switch to plain push mode without seeking
* instead of failing. */
if (!avi->have_index)
goto no_index;
}
}
/* use the indexes now to construct nice durations */
gst_avi_demux_calculate_durations_from_index (avi);
gst_avi_demux_expose_streams (avi, FALSE);
/* create initial NEWSEGMENT event */
if ((stop = avi->segment.stop) == GST_CLOCK_TIME_NONE)
stop = avi->segment.duration;
GST_DEBUG_OBJECT (avi, "segment stop %" G_GINT64_FORMAT, stop);
/* do initial seek to the default segment values */
gst_avi_demux_do_seek (avi, &avi->segment);
/* prepare initial segment */
if (avi->seek_event)
gst_event_unref (avi->seek_event);
avi->seek_event = gst_event_new_new_segment_full
(FALSE, avi->segment.rate, avi->segment.applied_rate, GST_FORMAT_TIME,
avi->segment.start, stop, avi->segment.time);
stamp = gst_util_get_timestamp () - stamp;
GST_DEBUG_OBJECT (avi, "pulling header %" GST_TIME_FORMAT,
GST_TIME_ARGS (stamp));
/* at this point we know all the streams and we can signal the no more
* pads signal */
GST_DEBUG_OBJECT (avi, "signaling no more pads");
gst_element_no_more_pads (GST_ELEMENT_CAST (avi));
return GST_FLOW_OK;
/* ERRORS */
no_list:
{
GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
("Invalid AVI header (no LIST at start): %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag)));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
no_header:
{
GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
("Invalid AVI header (no hdrl at start): %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag)));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
no_avih:
{
GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
("Invalid AVI header (no avih at start): %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag)));
if (sub)
gst_buffer_unref (sub);
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
invalid_avih:
{
GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
("Invalid AVI header (cannot parse avih at start)"));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
no_streams:
{
GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("No streams found"));
return GST_FLOW_ERROR;
}
no_index:
{
GST_WARNING ("file without or too big index");
GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
("Could not get/create index"));
return GST_FLOW_ERROR;
}
pull_range_failed:
{
GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
("pull_range flow reading header: %s", gst_flow_get_name (res)));
return GST_FLOW_ERROR;
}
}
/* move a stream to @index */
static void
gst_avi_demux_move_stream (GstAviDemux * avi, GstAviStream * stream,
GstSegment * segment, guint index)
{
GST_DEBUG_OBJECT (avi, "Move stream %d to %u", stream->num, index);
if (segment->rate < 0.0) {
guint next_key;
/* Because we don't know the frame order we need to push from the prev keyframe
* to the next keyframe. If there is a smart decoder downstream he will notice
* that there are too many encoded frames send and return UNEXPECTED when there
* are enough decoded frames to fill the segment. */
next_key = gst_avi_demux_index_next (avi, stream, index, TRUE);
/* FIXME, we go back to 0, we should look at segment.start. We will however
* stop earlier when the see the timestamp < segment.start */
stream->start_entry = 0;
stream->step_entry = index;
stream->current_entry = index;
stream->stop_entry = next_key;
GST_DEBUG_OBJECT (avi, "reverse seek: start %u, step %u, stop %u",
stream->start_entry, stream->step_entry, stream->stop_entry);
} else {
stream->start_entry = index;
stream->step_entry = index;
stream->stop_entry = gst_avi_demux_index_last (avi, stream);
}
if (stream->current_entry != index) {
GST_DEBUG_OBJECT (avi, "Move DISCONT from %u to %u",
stream->current_entry, index);
stream->current_entry = index;
stream->discont = TRUE;
}
/* update the buffer info */
gst_avi_demux_get_buffer_info (avi, stream, index,
&stream->current_timestamp, &stream->current_ts_end,
&stream->current_offset, &stream->current_offset_end);
GST_DEBUG_OBJECT (avi, "Moved to %u, ts %" GST_TIME_FORMAT
", ts_end %" GST_TIME_FORMAT ", off %" G_GUINT64_FORMAT
", off_end %" G_GUINT64_FORMAT, index,
GST_TIME_ARGS (stream->current_timestamp),
GST_TIME_ARGS (stream->current_ts_end), stream->current_offset,
stream->current_offset_end);
}
/*
* Do the actual seeking.
*/
static gboolean
gst_avi_demux_do_seek (GstAviDemux * avi, GstSegment * segment)
{
GstClockTime seek_time;
gboolean keyframe;
guint i, index;
GstAviStream *stream;
seek_time = segment->last_stop;
keyframe = !!(segment->flags & GST_SEEK_FLAG_KEY_UNIT);
GST_DEBUG_OBJECT (avi, "seek to: %" GST_TIME_FORMAT
" keyframe seeking:%d", GST_TIME_ARGS (seek_time), keyframe);
/* FIXME, this code assumes the main stream with keyframes is stream 0,
* which is mostly correct... */
stream = &avi->stream[avi->main_stream];
/* get the entry index for the requested position */
index = gst_avi_demux_index_for_time (avi, stream, seek_time);
GST_DEBUG_OBJECT (avi, "Got entry %u", index);
/* check if we are already on a keyframe */
if (!ENTRY_IS_KEYFRAME (&stream->index[index])) {
GST_DEBUG_OBJECT (avi, "not keyframe, searching back");
/* now go to the previous keyframe, this is where we should start
* decoding from. */
index = gst_avi_demux_index_prev (avi, stream, index, TRUE);
GST_DEBUG_OBJECT (avi, "previous keyframe at %u", index);
}
/* move the main stream to this position */
gst_avi_demux_move_stream (avi, stream, segment, index);
if (keyframe) {
/* when seeking to a keyframe, we update the result seek time
* to the time of the keyframe. */
seek_time = stream->current_timestamp;
GST_DEBUG_OBJECT (avi, "keyframe adjusted to %" GST_TIME_FORMAT,
GST_TIME_ARGS (seek_time));
}
/* the seek time is also the last_stop and stream time when going
* forwards */
segment->last_stop = seek_time;
if (segment->rate > 0.0)
segment->time = seek_time;
/* now set DISCONT and align the other streams */
for (i = 0; i < avi->num_streams; i++) {
GstAviStream *ostream;
ostream = &avi->stream[i];
if ((ostream == stream) || (ostream->index == NULL))
continue;
/* get the entry index for the requested position */
index = gst_avi_demux_index_for_time (avi, ostream, seek_time);
/* move to previous keyframe */
if (!ENTRY_IS_KEYFRAME (&ostream->index[index]))
index = gst_avi_demux_index_prev (avi, ostream, index, TRUE);
gst_avi_demux_move_stream (avi, ostream, segment, index);
}
GST_DEBUG_OBJECT (avi, "done seek to: %" GST_TIME_FORMAT,
GST_TIME_ARGS (seek_time));
return TRUE;
}
/*
* Handle seek event.
*/
static gboolean
gst_avi_demux_handle_seek (GstAviDemux * avi, GstPad * pad, GstEvent * event)
{
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
gint64 cur, stop;
gboolean flush;
gboolean update;
GstSegment seeksegment = { 0, };
gint i;
if (event) {
GST_DEBUG_OBJECT (avi, "doing seek with event");
gst_event_parse_seek (event, &rate, &format, &flags,
&cur_type, &cur, &stop_type, &stop);
/* we have to have a format as the segment format. Try to convert
* if not. */
if (format != GST_FORMAT_TIME) {
GstFormat fmt = GST_FORMAT_TIME;
gboolean res = TRUE;
if (cur_type != GST_SEEK_TYPE_NONE)
res = gst_pad_query_convert (pad, format, cur, &fmt, &cur);
if (res && stop_type != GST_SEEK_TYPE_NONE)
res = gst_pad_query_convert (pad, format, stop, &fmt, &stop);
if (!res)
goto no_format;
format = fmt;
}
GST_DEBUG_OBJECT (avi,
"seek requested: rate %g cur %" GST_TIME_FORMAT " stop %"
GST_TIME_FORMAT, rate, GST_TIME_ARGS (cur), GST_TIME_ARGS (stop));
/* FIXME: can we do anything with rate!=1.0 */
} else {
GST_DEBUG_OBJECT (avi, "doing seek without event");
flags = 0;
rate = 1.0;
}
/* save flush flag */
flush = flags & GST_SEEK_FLAG_FLUSH;
if (flush) {
GstEvent *fevent = gst_event_new_flush_start ();
/* for a flushing seek, we send a flush_start on all pads. This will
* eventually stop streaming with a WRONG_STATE. We can thus eventually
* take the STREAM_LOCK. */
GST_DEBUG_OBJECT (avi, "sending flush start");
gst_avi_demux_push_event (avi, gst_event_ref (fevent));
gst_pad_push_event (avi->sinkpad, fevent);
} else {
/* a non-flushing seek, we PAUSE the task so that we can take the
* STREAM_LOCK */
GST_DEBUG_OBJECT (avi, "non flushing seek, pausing task");
gst_pad_pause_task (avi->sinkpad);
}
/* wait for streaming to stop */
GST_DEBUG_OBJECT (avi, "wait for streaming to stop");
GST_PAD_STREAM_LOCK (avi->sinkpad);
/* copy segment, we need this because we still need the old
* segment when we close the current segment. */
memcpy (&seeksegment, &avi->segment, sizeof (GstSegment));
if (event) {
GST_DEBUG_OBJECT (avi, "configuring seek");
gst_segment_set_seek (&seeksegment, rate, format, flags,
cur_type, cur, stop_type, stop, &update);
}
/* do the seek, seeksegment.last_stop contains the new position, this
* actually never fails. */
gst_avi_demux_do_seek (avi, &seeksegment);
if (flush) {
GstEvent *fevent = gst_event_new_flush_stop ();
GST_DEBUG_OBJECT (avi, "sending flush stop");
gst_avi_demux_push_event (avi, gst_event_ref (fevent));
gst_pad_push_event (avi->sinkpad, fevent);
/* reset the last flow and mark discont, FLUSH is always DISCONT */
for (i = 0; i < avi->num_streams; i++) {
avi->stream[i].last_flow = GST_FLOW_OK;
avi->stream[i].discont = TRUE;
}
} else if (avi->segment_running) {
GstEvent *seg;
/* we are running the current segment and doing a non-flushing seek,
* close the segment first based on the last_stop. */
GST_DEBUG_OBJECT (avi, "closing running segment %" G_GINT64_FORMAT
" to %" G_GINT64_FORMAT, avi->segment.start, avi->segment.last_stop);
seg = gst_event_new_new_segment_full (TRUE,
avi->segment.rate, avi->segment.applied_rate, avi->segment.format,
avi->segment.start, avi->segment.last_stop, avi->segment.time);
gst_avi_demux_push_event (avi, seg);
}
/* now update the real segment info */
memcpy (&avi->segment, &seeksegment, sizeof (GstSegment));
/* post the SEGMENT_START message when we do segmented playback */
if (avi->segment.flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT (avi),
gst_message_new_segment_start (GST_OBJECT (avi),
avi->segment.format, avi->segment.last_stop));
}
/* prepare for streaming again */
if ((stop = avi->segment.stop) == GST_CLOCK_TIME_NONE)
stop = avi->segment.duration;
/* queue the segment event for the streaming thread. */
if (avi->seek_event)
gst_event_unref (avi->seek_event);
if (avi->segment.rate > 0.0) {
/* forwards goes from last_stop to stop */
avi->seek_event = gst_event_new_new_segment_full (FALSE,
avi->segment.rate, avi->segment.applied_rate, avi->segment.format,
avi->segment.last_stop, stop, avi->segment.time);
} else {
/* reverse goes from start to last_stop */
avi->seek_event = gst_event_new_new_segment_full (FALSE,
avi->segment.rate, avi->segment.applied_rate, avi->segment.format,
avi->segment.start, avi->segment.last_stop, avi->segment.time);
}
if (!avi->streaming) {
avi->segment_running = TRUE;
gst_pad_start_task (avi->sinkpad, (GstTaskFunction) gst_avi_demux_loop,
avi->sinkpad);
}
GST_PAD_STREAM_UNLOCK (avi->sinkpad);
return TRUE;
/* ERRORS */
no_format:
{
GST_DEBUG_OBJECT (avi, "unsupported format given, seek aborted.");
return FALSE;
}
}
static gboolean
gst_avi_demux_handle_seek_push (GstAviDemux * avi, GstPad * pad,
GstEvent * event)
{
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType cur_type, stop_type;
gint64 cur, stop;
gboolean res;
gint64 byte_cur;
gint64 time = 0;
GstIndexEntry *entry;
GST_DEBUG_OBJECT (avi, "doing push-based seek");
gst_event_parse_seek (event, &rate, &format, &flags,
&cur_type, &cur, &stop_type, &stop);
if (stop_type != GST_SEEK_TYPE_NONE)
goto unsupported_seek;
stop = -1;
/* only forward streaming and seeking is possible */
if (rate <= 0)
goto unsupported_seek;
/* only TIME */
if (format != GST_FORMAT_TIME)
goto unsupported_format;
/* not really advisable otherwise */
if ((flags & GST_SEEK_FLAG_FLUSH) == 0)
goto unsupported_seek;
/* should have index, let's check anyway */
if (!avi->element_index)
goto abort_seek;
/* find reasonable corresponding BYTE position
* note that we have no keyframe info in push mode whatsoever,
* so we can not cater for related stuff in any way */
/* some slack aiming for a keyframe */
if (cur < GST_AVI_SEEK_PUSH_DISPLACE)
cur = 0;
else
cur -= GST_AVI_SEEK_PUSH_DISPLACE;
entry = gst_index_get_assoc_entry (avi->element_index, avi->index_id,
GST_INDEX_LOOKUP_BEFORE, GST_ASSOCIATION_FLAG_NONE, GST_FORMAT_TIME, cur);
if (!entry)
goto abort_seek;
gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &byte_cur);
gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &time);
GST_DEBUG_OBJECT (avi, "found index entry for %" GST_TIME_FORMAT
" at %" GST_TIME_FORMAT ", located at offset %" G_GINT64_FORMAT,
GST_TIME_ARGS (cur), GST_TIME_ARGS (time), byte_cur);
/* adjust offset to be in each stream's region */
byte_cur = gst_avi_demux_seek_streams (avi, byte_cur, TRUE);
/* let's not try push seeking if target and entry are too far apart */
if (cur - time > 30 * GST_SECOND)
goto abort_seek;
GST_DEBUG_OBJECT (avi, "Pushing BYTE seek rate %g, "
"start %" G_GINT64_FORMAT ", stop %" G_GINT64_FORMAT, rate, byte_cur,
stop);
/* BYTE seek event */
event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags, cur_type, byte_cur,
stop_type, stop);
res = gst_pad_push_event (avi->sinkpad, event);
return res;
/* ERRORS */
abort_seek:
{
GST_DEBUG_OBJECT (avi, "could not determine byte position to seek to, "
"seek aborted.");
return FALSE;
}
unsupported_seek:
{
GST_DEBUG_OBJECT (avi, "unsupported seek, seek aborted.");
return FALSE;
}
unsupported_format:
{
GST_DEBUG_OBJECT (avi, "unsupported format given, seek aborted.");
return FALSE;
}
}
/*
* Helper for gst_avi_demux_invert()
*/
static inline void
swap_line (guint8 * d1, guint8 * d2, guint8 * tmp, gint bytes)
{
memcpy (tmp, d1, bytes);
memcpy (d1, d2, bytes);
memcpy (d2, tmp, bytes);
}
#define gst_avi_demux_is_uncompressed(fourcc) \
(fourcc == GST_RIFF_DIB || \
fourcc == GST_RIFF_rgb || \
fourcc == GST_RIFF_RGB || fourcc == GST_RIFF_RAW)
/*
* Invert DIB buffers... Takes existing buffer and
* returns either the buffer or a new one (with old
* one dereferenced).
* FIXME: can't we preallocate tmp? and remember stride, bpp?
*/
static GstBuffer *
gst_avi_demux_invert (GstAviStream * stream, GstBuffer * buf)
{
GstStructure *s;
gint y, w, h;
gint bpp, stride;
guint8 *tmp = NULL;
if (stream->strh->type != GST_RIFF_FCC_vids)
return buf;
if (!gst_avi_demux_is_uncompressed (stream->strh->fcc_handler)) {
return buf; /* Ignore non DIB buffers */
}
s = gst_caps_get_structure (GST_PAD_CAPS (stream->pad), 0);
if (!gst_structure_get_int (s, "bpp", &bpp)) {
GST_WARNING ("Failed to retrieve depth from caps");
return buf;
}
if (stream->strf.vids == NULL) {
GST_WARNING ("Failed to retrieve vids for stream");
return buf;
}
h = stream->strf.vids->height;
w = stream->strf.vids->width;
stride = w * (bpp / 8);
buf = gst_buffer_make_writable (buf);
if (GST_BUFFER_SIZE (buf) < (stride * h)) {
GST_WARNING ("Buffer is smaller than reported Width x Height x Depth");
return buf;
}
tmp = g_malloc (stride);
for (y = 0; y < h / 2; y++) {
swap_line (GST_BUFFER_DATA (buf) + stride * y,
GST_BUFFER_DATA (buf) + stride * (h - 1 - y), tmp, stride);
}
g_free (tmp);
return buf;
}
static void
gst_avi_demux_add_assoc (GstAviDemux * avi, GstAviStream * stream,
GstClockTime timestamp, guint64 offset, gboolean keyframe)
{
/* do not add indefinitely for open-ended streaming */
if (G_UNLIKELY (avi->element_index && avi->seekable)) {
GST_LOG_OBJECT (avi, "adding association %" GST_TIME_FORMAT "-> %"
G_GUINT64_FORMAT, GST_TIME_ARGS (timestamp), offset);
gst_index_add_association (avi->element_index, avi->index_id,
keyframe ? GST_ASSOCIATION_FLAG_KEY_UNIT : GST_ASSOCIATION_FLAG_NONE,
GST_FORMAT_TIME, timestamp, GST_FORMAT_BYTES, offset, NULL);
/* well, current_total determines TIME and entry DEFAULT (frame #) ... */
gst_index_add_association (avi->element_index, stream->index_id,
GST_ASSOCIATION_FLAG_NONE,
GST_FORMAT_TIME, stream->current_total, GST_FORMAT_BYTES, offset,
GST_FORMAT_DEFAULT, stream->current_entry, NULL);
}
}
/*
* Returns the aggregated GstFlowReturn.
*/
static GstFlowReturn
gst_avi_demux_combine_flows (GstAviDemux * avi, GstAviStream * stream,
GstFlowReturn ret)
{
guint i;
gboolean unexpected = FALSE, not_linked = TRUE;
/* store the value */
stream->last_flow = ret;
/* any other error that is not-linked or eos can be returned right away */
if (G_LIKELY (ret != GST_FLOW_UNEXPECTED && ret != GST_FLOW_NOT_LINKED))
goto done;
/* only return NOT_LINKED if all other pads returned NOT_LINKED */
for (i = 0; i < avi->num_streams; i++) {
GstAviStream *ostream = &avi->stream[i];
ret = ostream->last_flow;
/* no unexpected or unlinked, return */
if (G_LIKELY (ret != GST_FLOW_UNEXPECTED && ret != GST_FLOW_NOT_LINKED))
goto done;
/* we check to see if we have at least 1 unexpected or all unlinked */
unexpected |= (ret == GST_FLOW_UNEXPECTED);
not_linked &= (ret == GST_FLOW_NOT_LINKED);
}
/* when we get here, we all have unlinked or unexpected */
if (not_linked)
ret = GST_FLOW_NOT_LINKED;
else if (unexpected)
ret = GST_FLOW_UNEXPECTED;
done:
GST_LOG_OBJECT (avi, "combined %s to return %s",
gst_flow_get_name (stream->last_flow), gst_flow_get_name (ret));
return ret;
}
/* move @stream to the next position in its index */
static GstFlowReturn
gst_avi_demux_advance (GstAviDemux * avi, GstAviStream * stream,
GstFlowReturn ret)
{
guint old_entry, new_entry;
old_entry = stream->current_entry;
/* move forwards */
new_entry = old_entry + 1;
/* see if we reached the end */
if (new_entry > stream->stop_entry) {
if (avi->segment.rate < 0.0) {
if (stream->step_entry == stream->start_entry) {
/* we stepped all the way to the start, eos */
GST_DEBUG_OBJECT (avi, "reverse reached start %u", stream->start_entry);
goto eos;
}
/* backwards, stop becomes step, find a new step */
stream->stop_entry = stream->step_entry;
stream->step_entry = gst_avi_demux_index_prev (avi, stream,
stream->stop_entry, TRUE);
GST_DEBUG_OBJECT (avi,
"reverse playback jump: start %u, step %u, stop %u",
stream->start_entry, stream->step_entry, stream->stop_entry);
/* and start from the previous keyframe now */
new_entry = stream->step_entry;
} else {
/* EOS */
GST_DEBUG_OBJECT (avi, "forward reached stop %u", stream->stop_entry);
goto eos;
}
}
if (new_entry != old_entry) {
stream->current_entry = new_entry;
stream->current_total = stream->index[new_entry].total;
if (new_entry == old_entry + 1) {
GST_DEBUG_OBJECT (avi, "moved forwards from %u to %u",
old_entry, new_entry);
/* we simply moved one step forwards, reuse current info */
stream->current_timestamp = stream->current_ts_end;
stream->current_offset = stream->current_offset_end;
gst_avi_demux_get_buffer_info (avi, stream, new_entry,
NULL, &stream->current_ts_end, NULL, &stream->current_offset_end);
} else {
/* we moved DISCONT, full update */
gst_avi_demux_get_buffer_info (avi, stream, new_entry,
&stream->current_timestamp, &stream->current_ts_end,
&stream->current_offset, &stream->current_offset_end);
/* and MARK discont for this stream */
stream->last_flow = GST_FLOW_OK;
stream->discont = TRUE;
GST_DEBUG_OBJECT (avi, "Moved from %u to %u, ts %" GST_TIME_FORMAT
", ts_end %" GST_TIME_FORMAT ", off %" G_GUINT64_FORMAT
", off_end %" G_GUINT64_FORMAT, old_entry, new_entry,
GST_TIME_ARGS (stream->current_timestamp),
GST_TIME_ARGS (stream->current_ts_end), stream->current_offset,
stream->current_offset_end);
}
}
return ret;
/* ERROR */
eos:
{
GST_DEBUG_OBJECT (avi, "we are EOS");
/* setting current_timestamp to -1 marks EOS */
stream->current_timestamp = -1;
return GST_FLOW_UNEXPECTED;
}
}
/* find the stream with the lowest current position when going forwards or with
* the highest position when going backwards, this is the stream
* we should push from next */
static gint
gst_avi_demux_find_next (GstAviDemux * avi, gfloat rate)
{
guint64 min_time, max_time;
guint stream_num, i;
max_time = 0;
min_time = G_MAXUINT64;
stream_num = -1;
for (i = 0; i < avi->num_streams; i++) {
guint64 position;
GstAviStream *stream;
stream = &avi->stream[i];
position = stream->current_timestamp;
/* position of -1 is EOS */
if (position != -1) {
if (rate > 0.0 && position < min_time) {
min_time = position;
stream_num = i;
} else if (rate < 0.0 && position >= max_time) {
max_time = position;
stream_num = i;
}
}
}
return stream_num;
}
static GstFlowReturn
gst_avi_demux_loop_data (GstAviDemux * avi)
{
GstFlowReturn ret = GST_FLOW_OK;
guint stream_num;
GstAviStream *stream;
gboolean processed = FALSE;
GstBuffer *buf;
guint64 offset, size;
GstClockTime timestamp, duration;
guint64 out_offset, out_offset_end;
gboolean keyframe;
GstAviIndexEntry *entry;
do {
stream_num = gst_avi_demux_find_next (avi, avi->segment.rate);
/* all are EOS */
if (G_UNLIKELY (stream_num == -1)) {
GST_DEBUG_OBJECT (avi, "all streams are EOS");
goto eos;
}
/* we have the stream now */
stream = &avi->stream[stream_num];
/* skip streams without pads */
if (!stream->pad) {
GST_DEBUG_OBJECT (avi, "skipping entry from stream %d without pad",
stream_num);
goto next;
}
/* get the timing info for the entry */
timestamp = stream->current_timestamp;
duration = stream->current_ts_end - timestamp;
out_offset = stream->current_offset;
out_offset_end = stream->current_offset_end;
/* get the entry data info */
entry = &stream->index[stream->current_entry];
offset = entry->offset;
size = entry->size;
keyframe = ENTRY_IS_KEYFRAME (entry);
/* skip empty entries */
if (size == 0) {
GST_DEBUG_OBJECT (avi, "Skipping entry %u (%" G_GUINT64_FORMAT ", %p)",
stream->current_entry, size, stream->pad);
goto next;
}
if (avi->segment.rate > 0.0) {
/* only check this for fowards playback for now */
if (keyframe && GST_CLOCK_TIME_IS_VALID (avi->segment.stop)
&& (timestamp > avi->segment.stop)) {
goto eos_stop;
}
}
GST_LOG ("reading buffer (size=%" G_GUINT64_FORMAT "), stream %d, pos %"
G_GUINT64_FORMAT " (0x%" G_GINT64_MODIFIER "x), kf %d", size,
stream_num, offset, offset, keyframe);
/* FIXME, check large chunks and cut them up */
/* pull in the data */
ret = gst_pad_pull_range (avi->sinkpad, offset, size, &buf);
if (ret != GST_FLOW_OK)
goto pull_failed;
/* check for short buffers, this is EOS as well */
if (GST_BUFFER_SIZE (buf) < size)
goto short_buffer;
/* invert the picture if needed */
buf = gst_avi_demux_invert (stream, buf);
/* mark non-keyframes */
if (keyframe)
GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
else
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
GST_BUFFER_TIMESTAMP (buf) = timestamp;
GST_BUFFER_DURATION (buf) = duration;
GST_BUFFER_OFFSET (buf) = out_offset;
GST_BUFFER_OFFSET_END (buf) = out_offset_end;
/* mark discont when pending */
if (stream->discont) {
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
stream->discont = FALSE;
}
gst_avi_demux_add_assoc (avi, stream, timestamp, offset, keyframe);
gst_buffer_set_caps (buf, GST_PAD_CAPS (stream->pad));
/* update current position in the segment */
gst_segment_set_last_stop (&avi->segment, GST_FORMAT_TIME, timestamp);
GST_DEBUG_OBJECT (avi, "Pushing buffer of size %u, ts %"
GST_TIME_FORMAT ", dur %" GST_TIME_FORMAT ", off %" G_GUINT64_FORMAT
", off_end %" G_GUINT64_FORMAT,
GST_BUFFER_SIZE (buf), GST_TIME_ARGS (timestamp),
GST_TIME_ARGS (duration), out_offset, out_offset_end);
ret = gst_pad_push (stream->pad, buf);
/* mark as processed, we increment the frame and byte counters then
* leave the while loop and return the GstFlowReturn */
processed = TRUE;
if (avi->segment.rate < 0) {
if (timestamp > avi->segment.stop && ret == GST_FLOW_UNEXPECTED) {
/* In reverse playback we can get a GST_FLOW_UNEXPECTED when
* we are at the end of the segment, so we just need to jump
* back to the previous section. */
GST_DEBUG_OBJECT (avi, "downstream has reached end of segment");
ret = GST_FLOW_OK;
}
}
next:
/* move to next item */
ret = gst_avi_demux_advance (avi, stream, ret);
/* combine flows */
ret = gst_avi_demux_combine_flows (avi, stream, ret);
} while (!processed);
beach:
return ret;
/* special cases */
eos:
{
GST_DEBUG_OBJECT (avi, "No samples left for any streams - EOS");
ret = GST_FLOW_UNEXPECTED;
goto beach;
}
eos_stop:
{
GST_LOG_OBJECT (avi, "Found keyframe after segment,"
" setting EOS (%" GST_TIME_FORMAT " > %" GST_TIME_FORMAT ")",
GST_TIME_ARGS (timestamp), GST_TIME_ARGS (avi->segment.stop));
ret = GST_FLOW_UNEXPECTED;
goto beach;
}
pull_failed:
{
GST_DEBUG_OBJECT (avi, "pull range failed: pos=%" G_GUINT64_FORMAT
" size=%" G_GUINT64_FORMAT, offset, size);
goto beach;
}
short_buffer:
{
GST_WARNING_OBJECT (avi, "Short read at offset %" G_GUINT64_FORMAT
", only got %d/%" G_GUINT64_FORMAT " bytes (truncated file?)", offset,
GST_BUFFER_SIZE (buf), size);
gst_buffer_unref (buf);
ret = GST_FLOW_UNEXPECTED;
goto beach;
}
}
/*
* Read data. If we have an index it delegates to
* gst_avi_demux_process_next_entry().
*/
static GstFlowReturn
gst_avi_demux_stream_data (GstAviDemux * avi)
{
guint32 tag = 0;
guint32 size = 0;
gint stream_nr = 0;
GstFlowReturn res = GST_FLOW_OK;
GstFormat format = GST_FORMAT_TIME;
if (G_UNLIKELY (avi->have_eos)) {
/* Clean adapter, we're done */
gst_adapter_clear (avi->adapter);
return GST_FLOW_UNEXPECTED;
}
if (G_UNLIKELY (avi->todrop)) {
guint drop;
if ((drop = gst_adapter_available (avi->adapter))) {
if (drop > avi->todrop)
drop = avi->todrop;
GST_DEBUG_OBJECT (avi, "Dropping %d bytes", drop);
gst_adapter_flush (avi->adapter, drop);
avi->todrop -= drop;
avi->offset += drop;
}
}
/* Iterate until need more data, so adapter won't grow too much */
while (1) {
if (G_UNLIKELY (!gst_avi_demux_peek_chunk_info (avi, &tag, &size))) {
return GST_FLOW_OK;
}
GST_DEBUG ("Trying chunk (%" GST_FOURCC_FORMAT "), size %d",
GST_FOURCC_ARGS (tag), size);
if (G_LIKELY ((tag & 0xff) >= '0' && (tag & 0xff) <= '9' &&
((tag >> 8) & 0xff) >= '0' && ((tag >> 8) & 0xff) <= '9')) {
GST_LOG ("Chunk ok");
} else if ((tag & 0xffff) == (('x' << 8) | 'i')) {
GST_DEBUG ("Found sub-index tag");
if (gst_avi_demux_peek_chunk (avi, &tag, &size) || size == 0) {
/* accept 0 size buffer here */
avi->abort_buffering = FALSE;
GST_DEBUG (" skipping %d bytes for now", size);
gst_adapter_flush (avi->adapter, 8 + GST_ROUND_UP_2 (size));
}
return GST_FLOW_OK;
} else if (tag == GST_RIFF_TAG_idx1) {
GST_DEBUG ("Found index tag, stream done");
avi->have_eos = TRUE;
return GST_FLOW_UNEXPECTED;
} else if (tag == GST_RIFF_TAG_LIST) {
/* movi chunks might be grouped in rec list */
if (gst_adapter_available (avi->adapter) >= 12) {
GST_DEBUG ("Found LIST tag, skipping LIST header");
gst_adapter_flush (avi->adapter, 12);
continue;
}
return GST_FLOW_OK;
} else if (tag == GST_RIFF_TAG_JUNK) {
/* rec list might contain JUNK chunks */
GST_DEBUG ("Found JUNK tag");
if (gst_avi_demux_peek_chunk (avi, &tag, &size) || size == 0) {
/* accept 0 size buffer here */
avi->abort_buffering = FALSE;
GST_DEBUG (" skipping %d bytes for now", size);
gst_adapter_flush (avi->adapter, 8 + GST_ROUND_UP_2 (size));
}
return GST_FLOW_OK;
} else {
GST_DEBUG ("No more stream chunks, send EOS");
avi->have_eos = TRUE;
return GST_FLOW_UNEXPECTED;
}
if (G_UNLIKELY (!gst_avi_demux_peek_chunk (avi, &tag, &size))) {
/* supposedly one hopes to catch a nicer chunk later on ... */
/* FIXME ?? give up here rather than possibly ending up going
* through the whole file */
if (avi->abort_buffering) {
avi->abort_buffering = FALSE;
gst_adapter_flush (avi->adapter, 8);
}
return GST_FLOW_OK;
}
GST_DEBUG ("chunk ID %" GST_FOURCC_FORMAT ", size %u",
GST_FOURCC_ARGS (tag), size);
stream_nr = CHUNKID_TO_STREAMNR (tag);
if (G_UNLIKELY (stream_nr < 0 || stream_nr >= avi->num_streams)) {
/* recoverable */
GST_WARNING ("Invalid stream ID %d (%" GST_FOURCC_FORMAT ")",
stream_nr, GST_FOURCC_ARGS (tag));
avi->offset += 8 + GST_ROUND_UP_2 (size);
gst_adapter_flush (avi->adapter, 8 + GST_ROUND_UP_2 (size));
} else {
GstAviStream *stream;
GstClockTime next_ts = 0;
GstBuffer *buf;
guint64 offset;
gst_adapter_flush (avi->adapter, 8);
/* get buffer */
buf = gst_adapter_take_buffer (avi->adapter, GST_ROUND_UP_2 (size));
/* patch the size */
GST_BUFFER_SIZE (buf) = size;
offset = avi->offset;
avi->offset += 8 + GST_ROUND_UP_2 (size);
stream = &avi->stream[stream_nr];
/* set delay (if any)
if (stream->strh->init_frames == stream->current_frame &&
stream->delay == 0)
stream->delay = next_ts;
*/
/* parsing of corresponding header may have failed */
if (G_UNLIKELY (!stream->pad)) {
GST_WARNING_OBJECT (avi, "no pad for stream ID %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (tag));
gst_buffer_unref (buf);
} else {
GstClockTime dur_ts = 0;
/* get time of this buffer */
gst_pad_query_position (stream->pad, &format, (gint64 *) & next_ts);
if (G_UNLIKELY (format != GST_FORMAT_TIME))
goto wrong_format;
gst_avi_demux_add_assoc (avi, stream, next_ts, offset, FALSE);
/* increment our positions */
stream->current_entry++;
stream->current_total += size;
/* invert the picture if needed */
buf = gst_avi_demux_invert (stream, buf);
gst_pad_query_position (stream->pad, &format, (gint64 *) & dur_ts);
if (G_UNLIKELY (format != GST_FORMAT_TIME))
goto wrong_format;
GST_BUFFER_TIMESTAMP (buf) = next_ts;
GST_BUFFER_DURATION (buf) = dur_ts - next_ts;
if (stream->strh->type == GST_RIFF_FCC_vids) {
GST_BUFFER_OFFSET (buf) = stream->current_entry - 1;
GST_BUFFER_OFFSET_END (buf) = stream->current_entry;
} else {
GST_BUFFER_OFFSET (buf) = GST_BUFFER_OFFSET_NONE;
GST_BUFFER_OFFSET_END (buf) = GST_BUFFER_OFFSET_NONE;
}
gst_buffer_set_caps (buf, GST_PAD_CAPS (stream->pad));
GST_DEBUG_OBJECT (avi,
"Pushing buffer with time=%" GST_TIME_FORMAT ", duration %"
GST_TIME_FORMAT ", offset %" G_GUINT64_FORMAT
" and size %d over pad %s", GST_TIME_ARGS (next_ts),
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_BUFFER_OFFSET (buf),
size, GST_PAD_NAME (stream->pad));
/* update current position in the segment */
gst_segment_set_last_stop (&avi->segment, GST_FORMAT_TIME, next_ts);
/* mark discont when pending */
if (G_UNLIKELY (stream->discont)) {
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
stream->discont = FALSE;
}
res = gst_pad_push (stream->pad, buf);
/* combine flows */
res = gst_avi_demux_combine_flows (avi, stream, res);
if (G_UNLIKELY (res != GST_FLOW_OK)) {
GST_DEBUG ("Push failed; %s", gst_flow_get_name (res));
return res;
}
}
}
}
done:
return res;
/* ERRORS */
wrong_format:
{
GST_DEBUG_OBJECT (avi, "format %s != GST_FORMAT_TIME",
gst_format_get_name (format));
res = GST_FLOW_ERROR;
goto done;
}
}
/*
* Send pending tags.
*/
static void
push_tag_lists (GstAviDemux * avi)
{
guint i;
GstTagList *tags;
if (!avi->got_tags)
return;
GST_DEBUG_OBJECT (avi, "Pushing pending tag lists");
for (i = 0; i < avi->num_streams; i++) {
GstAviStream *stream = &avi->stream[i];
GstPad *pad = stream->pad;
tags = stream->taglist;
if (pad && tags) {
GST_DEBUG_OBJECT (pad, "Tags: %" GST_PTR_FORMAT, tags);
gst_element_found_tags_for_pad (GST_ELEMENT_CAST (avi), pad, tags);
stream->taglist = NULL;
}
}
if (!(tags = avi->globaltags))
tags = gst_tag_list_new ();
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE,
GST_TAG_CONTAINER_FORMAT, "AVI", NULL);
GST_DEBUG_OBJECT (avi, "Global tags: %" GST_PTR_FORMAT, tags);
gst_element_found_tags (GST_ELEMENT_CAST (avi), tags);
avi->globaltags = NULL;
avi->got_tags = FALSE;
}
static void
gst_avi_demux_loop (GstPad * pad)
{
GstFlowReturn res;
GstAviDemux *avi = GST_AVI_DEMUX (GST_PAD_PARENT (pad));
switch (avi->state) {
case GST_AVI_DEMUX_START:
res = gst_avi_demux_stream_init_pull (avi);
if (G_UNLIKELY (res != GST_FLOW_OK)) {
GST_WARNING ("stream_init flow: %s", gst_flow_get_name (res));
goto pause;
}
avi->state = GST_AVI_DEMUX_HEADER;
/* fall-through */
case GST_AVI_DEMUX_HEADER:
res = gst_avi_demux_stream_header_pull (avi);
if (G_UNLIKELY (res != GST_FLOW_OK)) {
GST_WARNING ("stream_header flow: %s", gst_flow_get_name (res));
goto pause;
}
avi->state = GST_AVI_DEMUX_MOVI;
break;
case GST_AVI_DEMUX_MOVI:
if (G_UNLIKELY (avi->seek_event)) {
gst_avi_demux_push_event (avi, avi->seek_event);
avi->seek_event = NULL;
}
if (G_UNLIKELY (avi->got_tags)) {
push_tag_lists (avi);
}
/* process each index entry in turn */
res = gst_avi_demux_loop_data (avi);
/* pause when error */
if (G_UNLIKELY (res != GST_FLOW_OK)) {
GST_INFO ("stream_movi flow: %s", gst_flow_get_name (res));
goto pause;
}
break;
default:
GST_ERROR_OBJECT (avi, "unknown state %d", avi->state);
res = GST_FLOW_ERROR;
goto pause;
}
return;
/* ERRORS */
pause:
GST_LOG_OBJECT (avi, "pausing task, reason %s", gst_flow_get_name (res));
avi->segment_running = FALSE;
gst_pad_pause_task (avi->sinkpad);
if (GST_FLOW_IS_FATAL (res) || (res == GST_FLOW_NOT_LINKED)) {
gboolean push_eos = TRUE;
if (res == GST_FLOW_UNEXPECTED) {
/* handle end-of-stream/segment */
if (avi->segment.flags & GST_SEEK_FLAG_SEGMENT) {
gint64 stop;
if ((stop = avi->segment.stop) == -1)
stop = avi->segment.duration;
GST_INFO_OBJECT (avi, "sending segment_done");
gst_element_post_message
(GST_ELEMENT (avi),
gst_message_new_segment_done (GST_OBJECT (avi), GST_FORMAT_TIME,
stop));
push_eos = FALSE;
}
} else {
/* for fatal errors we post an error message */
GST_ELEMENT_ERROR (avi, STREAM, FAILED,
(_("Internal data stream error.")),
("streaming stopped, reason %s", gst_flow_get_name (res)));
}
if (push_eos) {
GST_INFO_OBJECT (avi, "sending eos");
if (!gst_avi_demux_push_event (avi, gst_event_new_eos ()) &&
(res == GST_FLOW_UNEXPECTED)) {
GST_ELEMENT_ERROR (avi, STREAM, DEMUX,
(NULL), ("got eos but no streams (yet)"));
}
}
}
}
static GstFlowReturn
gst_avi_demux_chain (GstPad * pad, GstBuffer * buf)
{
GstFlowReturn res;
GstAviDemux *avi = GST_AVI_DEMUX (GST_PAD_PARENT (pad));
GST_DEBUG ("Store %d bytes in adapter", GST_BUFFER_SIZE (buf));
gst_adapter_push (avi->adapter, buf);
switch (avi->state) {
case GST_AVI_DEMUX_START:
if ((res = gst_avi_demux_stream_init_push (avi)) != GST_FLOW_OK) {
GST_WARNING ("stream_init flow: %s", gst_flow_get_name (res));
break;
}
break;
case GST_AVI_DEMUX_HEADER:
if ((res = gst_avi_demux_stream_header_push (avi)) != GST_FLOW_OK) {
GST_WARNING ("stream_header flow: %s", gst_flow_get_name (res));
break;
}
break;
case GST_AVI_DEMUX_MOVI:
if (G_UNLIKELY (avi->seek_event)) {
gst_avi_demux_push_event (avi, avi->seek_event);
avi->seek_event = NULL;
}
if (G_UNLIKELY (avi->got_tags)) {
push_tag_lists (avi);
}
res = gst_avi_demux_stream_data (avi);
break;
default:
GST_ELEMENT_ERROR (avi, STREAM, FAILED, (NULL),
("Illegal internal state"));
res = GST_FLOW_ERROR;
break;
}
GST_DEBUG_OBJECT (avi, "state: %d res:%s", avi->state,
gst_flow_get_name (res));
if (G_UNLIKELY (avi->abort_buffering)) {
avi->abort_buffering = FALSE;
res = GST_FLOW_ERROR;
GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("unhandled buffer size"));
}
return res;
}
static gboolean
gst_avi_demux_sink_activate (GstPad * sinkpad)
{
if (gst_pad_check_pull_range (sinkpad)) {
GST_DEBUG ("going to pull mode");
return gst_pad_activate_pull (sinkpad, TRUE);
} else {
GST_DEBUG ("going to push (streaming) mode");
return gst_pad_activate_push (sinkpad, TRUE);
}
}
static gboolean
gst_avi_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)
{
GstAviDemux *avi = GST_AVI_DEMUX (GST_OBJECT_PARENT (sinkpad));
if (active) {
avi->segment_running = TRUE;
avi->streaming = FALSE;
return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_avi_demux_loop,
sinkpad);
} else {
avi->segment_running = FALSE;
return gst_pad_stop_task (sinkpad);
}
}
static gboolean
gst_avi_demux_activate_push (GstPad * pad, gboolean active)
{
GstAviDemux *avi = GST_AVI_DEMUX (GST_OBJECT_PARENT (pad));
if (active) {
GST_DEBUG ("avi: activating push/chain function");
avi->streaming = TRUE;
#if 0
/* create index for some push based seeking if not provided */
GST_OBJECT_LOCK (avi);
if (!avi->element_index) {
GST_DEBUG_OBJECT (avi, "creating index");
avi->element_index = gst_index_factory_make ("memindex");
}
GST_OBJECT_UNLOCK (avi);
/* object lock might be taken again */
gst_index_get_writer_id (avi->element_index, GST_OBJECT (avi),
&avi->index_id);
#endif
} else {
GST_DEBUG ("avi: deactivating push/chain function");
}
return TRUE;
}
static void
gst_avi_demux_set_index (GstElement * element, GstIndex * index)
{
GstAviDemux *avi = GST_AVI_DEMUX (element);
GST_OBJECT_LOCK (avi);
if (avi->element_index)
gst_object_unref (avi->element_index);
if (index) {
avi->element_index = gst_object_ref (index);
} else {
avi->element_index = NULL;
}
GST_OBJECT_UNLOCK (avi);
/* object lock might be taken again */
if (index)
gst_index_get_writer_id (index, GST_OBJECT (element), &avi->index_id);
GST_DEBUG_OBJECT (avi, "Set index %" GST_PTR_FORMAT, avi->element_index);
}
static GstIndex *
gst_avi_demux_get_index (GstElement * element)
{
GstIndex *result = NULL;
GstAviDemux *avi = GST_AVI_DEMUX (element);
GST_OBJECT_LOCK (avi);
if (avi->element_index)
result = gst_object_ref (avi->element_index);
GST_OBJECT_UNLOCK (avi);
GST_DEBUG_OBJECT (avi, "Returning index %" GST_PTR_FORMAT, result);
return result;
}
static GstStateChangeReturn
gst_avi_demux_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstAviDemux *avi = GST_AVI_DEMUX (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
avi->streaming = FALSE;
gst_segment_init (&avi->segment, GST_FORMAT_TIME);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
goto done;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_avi_demux_reset (avi);
break;
default:
break;
}
done:
return ret;
}