mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-09 10:59:39 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/gst/avi/gstavidemux.c
Tim-Philipp Müller 6bad19a588 gst/avi/gstavidemux.c: Catch short reads, like they might happen with truncated files (see #305279); remove unnecessa... 
Original commit message from CVS:
* gst/avi/gstavidemux.c: (gst_avi_demux_process_next_entry):
Catch short reads, like they might happen with truncated
files (see #305279); remove unnecessary indentation.
2006-03-14 15:28:00 +00:00

2692 lines
76 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@temple-baptist.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 */
#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>
GST_DEBUG_CATEGORY_STATIC (avidemux_debug);
#define GST_CAT_DEFAULT avidemux_debug
GST_DEBUG_CATEGORY_EXTERN (GST_CAT_EVENT);
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_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);
#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_handle_seek (GstAviDemux * avi, gboolean update);
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 GstStateChangeReturn gst_avi_demux_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class = NULL;
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 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"
"Ronald Bultje <rbultje@ronald.bitfreak.net>");
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstPadTemplate *videosrctempl, *audiosrctempl;
GstCaps *audcaps, *vidcaps;
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);
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,
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);
GST_DEBUG_CATEGORY_INIT (avidemux_debug, "avidemux",
0, "Demuxer for AVI streams");
parent_class = g_type_class_peek_parent (klass);
gstelement_class->change_state = gst_avi_demux_change_state;
}
static void
gst_avi_demux_init (GstAviDemux * avi)
{
avi->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get (&sink_templ),
"sink");
gst_pad_set_activate_function (avi->sinkpad, gst_avi_demux_sink_activate);
gst_pad_set_activatepull_function (avi->sinkpad,
gst_avi_demux_sink_activate_pull);
gst_element_add_pad (GST_ELEMENT (avi), avi->sinkpad);
gst_avi_demux_reset (avi);
avi->index_entries = NULL;
memset (&avi->stream, 0, sizeof (avi->stream));
}
static void
gst_avi_demux_reset (GstAviDemux * avi)
{
gint i;
for (i = 0; i < avi->num_streams; i++) {
g_free (avi->stream[i].strh);
g_free (avi->stream[i].strf.data);
if (avi->stream[i].name)
g_free (avi->stream[i].name);
if (avi->stream[i].initdata)
gst_buffer_unref (avi->stream[i].initdata);
if (avi->stream[i].extradata)
gst_buffer_unref (avi->stream[i].extradata);
if (avi->stream[i].pad)
gst_element_remove_pad (GST_ELEMENT (avi), avi->stream[i].pad);
}
memset (&avi->stream, 0, sizeof (avi->stream));
avi->num_streams = 0;
avi->num_v_streams = 0;
avi->num_a_streams = 0;
avi->state = GST_AVI_DEMUX_START;
avi->offset = 0;
g_free (avi->index_entries);
avi->index_entries = NULL;
avi->index_size = 0;
avi->index_offset = 0;
avi->current_entry = 0;
g_free (avi->avih);
avi->avih = NULL;
if (avi->seek_event)
gst_event_unref (avi->seek_event);
avi->seek_event = NULL;
avi->segment_rate = 1.0;
avi->segment_flags = 0;
avi->segment_start = -1;
avi->segment_stop = -1;
}
static gst_avi_index_entry *
gst_avi_demux_index_next (GstAviDemux * avi, gint stream_nr, gint start)
{
gint i;
gst_avi_index_entry *entry = NULL;
for (i = start; i < avi->index_size; i++) {
entry = &avi->index_entries[i];
if (entry->stream_nr == stream_nr)
break;
}
return entry;
}
static gst_avi_index_entry *
gst_avi_demux_index_entry_for_time (GstAviDemux * avi,
gint stream_nr, guint64 time, guint32 flags)
{
gst_avi_index_entry *entry = NULL, *last_entry = NULL;
gint i;
GST_LOG_OBJECT (avi, "stream_nr:%d , time:%" GST_TIME_FORMAT " flags:%d",
stream_nr, GST_TIME_ARGS (time), flags);
i = -1;
do {
entry = gst_avi_demux_index_next (avi, stream_nr, i + 1);
if (!entry)
return NULL;
i = entry->index_nr;
GST_LOG_OBJECT (avi,
"looking at entry %d / ts:%" GST_TIME_FORMAT " / dur:%" GST_TIME_FORMAT
" flags:%d", i, GST_TIME_ARGS (entry->ts), GST_TIME_ARGS (entry->dur),
entry->flags);
if (entry->ts <= time && (entry->flags & flags) == flags)
last_entry = entry;
} while (entry->ts < time);
return last_entry;
}
#if 0
static const GstFormat *
gst_avi_demux_get_src_formats (GstPad * pad)
{
avi_stream_context *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
static gboolean
gst_avi_demux_src_convert (GstPad * pad,
GstFormat src_format,
gint64 src_value, GstFormat * dest_format, gint64 * dest_value)
{
gboolean res = TRUE;
GstAviDemux *avidemux = GST_AVI_DEMUX (gst_pad_get_parent (pad));
avi_stream_context *stream = gst_pad_get_element_private (pad);
GST_LOG_OBJECT (avidemux,
"Received src_format:%d, src_value:%lld, dest_format:%d", src_format,
src_value, *dest_format);
if (src_format == *dest_format) {
*dest_value = src_value;
goto done;
}
if (!stream->strh || !stream->strf.data) {
res = FALSE;
goto done;
}
if (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 (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 = gst_util_uint64_scale_int (src_value, GST_SECOND,
stream->strf.auds->av_bps);
} else
res = FALSE;
break;
default:
res = FALSE;
break;
}
break;
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value =
gst_util_uint64_scale (src_value,
stream->strh->scale * GST_SECOND, stream->strh->rate);
break;
default:
res = FALSE;
break;
}
break;
default:
res = FALSE;
}
done:
GST_LOG_OBJECT (avidemux, "Returning res:%d dest_format:%d dest_value:%lld",
res, *dest_format, *dest_value);
gst_object_unref (avidemux);
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,
0
};
return src_types;
}
static gboolean
gst_avi_demux_handle_src_query (GstPad * pad, GstQuery * query)
{
gboolean res = TRUE;
GstAviDemux *demux = GST_AVI_DEMUX (GST_PAD_PARENT (pad));
avi_stream_context *stream = gst_pad_get_element_private (pad);
if (!stream->strh || !stream->strf.data)
return FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:{
gint64 pos = 0;
if (stream->strh->type == GST_RIFF_FCC_auds) {
if (!stream->strh->samplesize) {
pos = gst_util_uint64_scale_int ((gint64) stream->current_frame *
stream->strh->scale, GST_SECOND, stream->strh->rate);
} else if (stream->strf.auds->av_bps != 0) {
pos = gst_util_uint64_scale_int (stream->current_byte, GST_SECOND,
stream->strf.auds->av_bps);
} else if (stream->total_frames != 0 && stream->total_bytes != 0) {
/* calculate timestamps based on video size */
guint64 xlen = demux->avih->us_frame *
demux->avih->tot_frames * GST_USECOND;
if (!stream->strh->samplesize)
pos = gst_util_uint64_scale_int (xlen, stream->current_frame,
stream->total_frames);
else
pos = gst_util_uint64_scale_int (xlen, stream->current_byte,
stream->total_bytes);
} else {
res = FALSE;
}
} else {
if (stream->strh->rate != 0) {
pos =
gst_util_uint64_scale_int ((guint64) stream->current_frame *
stream->strh->scale, GST_SECOND, stream->strh->rate);
} else {
pos = stream->current_frame * demux->avih->us_frame * GST_USECOND;
}
}
if (res)
gst_query_set_position (query, GST_FORMAT_TIME, pos);
break;
}
case GST_QUERY_DURATION:
{
if (stream->strh->type != GST_RIFF_FCC_auds &&
stream->strh->type != GST_RIFF_FCC_vids) {
res = FALSE;
break;
}
/* use duration from the index if we have an
* index instead of trusting the stream header */
if (GST_CLOCK_TIME_IS_VALID (stream->idx_duration)) {
gst_query_set_duration (query, GST_FORMAT_TIME, stream->idx_duration);
} else {
gint64 len;
len =
gst_util_uint64_scale ((guint64) stream->strh->length *
stream->strh->scale, GST_SECOND, stream->strh->rate);
gst_query_set_duration (query, GST_FORMAT_TIME, len);
}
break;
}
default:
res = gst_pad_query_default (pad, query);
break;
}
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 gboolean
gst_avi_demux_handle_src_event (GstPad * pad, GstEvent * event)
{
gboolean res = TRUE;
GstAviDemux *avi = GST_AVI_DEMUX (GST_PAD_PARENT (pad));
avi_stream_context *stream;
GST_CAT_DEBUG_OBJECT (GST_CAT_EVENT, avi,
"have event type %s: %p on src pad", GST_EVENT_TYPE_NAME (event), event);
if (!avi->index_entries) {
GST_CAT_DEBUG_OBJECT (GST_CAT_EVENT, avi, "no index entries, returning");
return FALSE;
}
stream = gst_pad_get_element_private (pad);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
/* FIXME, this seeking code is not correct, look at wavparse for
* a better example */
GstFormat format;
GstSeekFlags flags;
gdouble rate;
gint64 start, stop;
gint64 tstart, tstop;
gint64 duration;
GstFormat tformat = GST_FORMAT_TIME;
GstSeekType start_type, stop_type;
gboolean update_start = TRUE;
gboolean update_stop = TRUE;
gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
&stop_type, &stop);
GST_DEBUG_OBJECT (avi,
"seek format %d, flags:%d, %08x, start:%lld, stop:%lld", format,
flags, stream->strh->type, start, stop);
if (format != GST_FORMAT_TIME) {
res &=
gst_avi_demux_src_convert (pad, format, start, &tformat, &tstart);
res &= gst_avi_demux_src_convert (pad, format, stop, &tformat, &tstop);
if (!res)
goto done;
} else {
tstart = start;
tstop = stop;
}
if (!gst_pad_query_duration (stream->pad, &tformat, &duration)) {
res = FALSE;
goto done;
}
switch (start_type) {
case GST_SEEK_TYPE_CUR:
tstart = avi->segment_start + tstart;
break;
case GST_SEEK_TYPE_END:
tstart = duration + tstart;
break;
case GST_SEEK_TYPE_NONE:
tstart = avi->segment_start;
update_start = FALSE;
break;
case GST_SEEK_TYPE_SET:
break;
}
tstart = CLAMP (tstart, 0, duration);
switch (stop_type) {
case GST_SEEK_TYPE_CUR:
tstop = avi->segment_stop + tstop;
break;
case GST_SEEK_TYPE_END:
tstop = duration + tstop;
break;
case GST_SEEK_TYPE_NONE:
tstop = avi->segment_stop;
update_stop = FALSE;
break;
case GST_SEEK_TYPE_SET:
break;
}
tstop = CLAMP (tstop, 0, duration);
/* now store the values */
avi->segment_rate = rate;
avi->segment_flags = flags;
avi->segment_start = tstart;
avi->segment_stop = tstop;
gst_avi_demux_handle_seek (avi, update_start || update_stop);
break;
}
default:
res = FALSE;
break;
}
done:
gst_event_unref (event);
return res;
}
/**
* 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. Discards buffer after use.
*
* 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;
if (!gst_riff_parse_file_header (element, buf, &doctype))
return FALSE;
if (doctype != GST_RIFF_RIFF_AVI)
goto not_avi;
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;
}
}
static GstFlowReturn
gst_avi_demux_stream_init (GstAviDemux * avi)
{
GstFlowReturn res;
GstBuffer *buf = NULL;
if ((res = gst_pad_pull_range (avi->sinkpad,
avi->offset, 12, &buf)) != GST_FLOW_OK)
return res;
else if (!gst_avi_demux_parse_file_header (GST_ELEMENT (avi), buf))
goto wrong_header;
avi->offset += 12;
return GST_FLOW_OK;
/* ERRORS */
wrong_header:
{
GST_DEBUG_OBJECT (avi, "error parsing file header");
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
}
/**
* 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:
* @element: 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 (GstElement * element,
GstBuffer * buf, guint64 ** _indexes)
{
guint8 *data = GST_BUFFER_DATA (buf);
gint bpe = 16, num, i;
guint64 *indexes;
*_indexes = NULL;
if (buf == NULL)
goto no_buffer;
if (!buf || GST_BUFFER_SIZE (buf) < 24)
goto too_small;
/* 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 (element,
"Superindex for stream %d 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]);
indexes = g_new (guint64, num + 1);
for (i = 0; i < num; i++) {
if (GST_BUFFER_SIZE (buf) < 24 + bpe * (i + 1))
break;
indexes[i] = GST_READ_UINT64_LE (&data[24 + bpe * i]);
}
indexes[i] = GST_BUFFER_OFFSET_NONE;
*_indexes = indexes;
gst_buffer_unref (buf);
return TRUE;
/* ERRORS */
no_buffer:
{
GST_ERROR_OBJECT (element, "No buffer");
return FALSE;
}
too_small:
{
GST_ERROR_OBJECT (element,
"Not enough data to parse superindex (%d available, %d needed)",
GST_BUFFER_SIZE (buf), 24);
gst_buffer_unref (buf);
return FALSE;
}
}
/**
* gst_avi_demux_parse_subindex:
* @element: caller element (used for errors/debug).
* @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 will be discarded after use.
*
* 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 (GstElement * element,
GstBuffer * buf, avi_stream_context * stream, GList ** _entries_list)
{
guint8 *data = GST_BUFFER_DATA (buf);
gint bpe, num, x;
guint64 baseoff;
gst_avi_index_entry *entries, *entry;
GList *entries_list = NULL;
GstFormat format = GST_FORMAT_TIME;
gint64 tmp;
/* check size */
if (buf == NULL)
goto no_buffer;
if (GST_BUFFER_SIZE (buf) < 24)
goto too_small;
/* 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 (element,
"Superindex for stream %d 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]);
baseoff = GST_READ_UINT64_LE (&data[12]);
entries = g_new (gst_avi_index_entry, num);
for (x = 0; x < num; x++) {
entry = &entries[x];
if (GST_BUFFER_SIZE (buf) < 24 + bpe * (x + 1))
break;
/* fill in */
entry->offset = baseoff + GST_READ_UINT32_LE (&data[24 + bpe * x]);
entry->size = GST_READ_UINT32_LE (&data[24 + bpe * x + 4]);
entry->flags = (entry->size & 0x80000000) ? 0 : GST_RIFF_IF_KEYFRAME;
entry->size &= ~0x80000000;
entry->index_nr = x;
entry->stream_nr = stream->num;
/* timestamps */
if (stream->strh->samplesize && stream->strh->type == GST_RIFF_FCC_auds) {
/* constant rate stream */
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES,
stream->total_bytes, &format, &tmp);
entry->ts = tmp;
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES,
stream->total_bytes + entry->size, &format, &tmp);
entry->dur = tmp;
} else {
/* VBR stream */
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT,
stream->total_frames, &format, &tmp);
entry->ts = tmp;
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT,
stream->total_frames + 1, &format, &tmp);
entry->dur = tmp;
}
entry->dur -= entry->ts;
/* stream position */
entry->bytes_before = stream->total_bytes;
stream->total_bytes += entry->size;
entry->frames_before = stream->total_frames;
stream->total_frames++;
entries_list = g_list_prepend (entries_list, entry);
}
GST_LOG_OBJECT (element, "Read %d index entries", x);
gst_buffer_unref (buf);
if (x > 0) {
*_entries_list = g_list_reverse (entries_list);
} else {
*_entries_list = NULL;
g_free (entries);
}
return TRUE;
/* ERRORS */
no_buffer:
{
GST_ERROR_OBJECT (element, "No buffer");
return TRUE; /* continue */
}
too_small:
{
GST_ERROR_OBJECT (element,
"Not enough data to parse subindex (%d available, %d needed)",
GST_BUFFER_SIZE (buf), 24);
gst_buffer_unref (buf);
*_entries_list = NULL;
return TRUE; /* continue */
}
not_implemented:
{
GST_ELEMENT_ERROR (element, STREAM, NOT_IMPLEMENTED, (NULL),
("Subindex-is-data is not implemented"));
gst_buffer_unref (buf);
return FALSE;
}
}
static void
gst_avi_demux_read_subindexes (GstAviDemux * avi,
GList ** index, GList ** alloc_list)
{
GList *list;
guint32 tag;
GstBuffer *buf;
gint i, n;
for (n = 0; n < avi->num_streams; n++) {
avi_stream_context *stream = &avi->stream[n];
for (i = 0; stream->indexes[i] != GST_BUFFER_OFFSET_NONE; i++) {
if (gst_riff_read_chunk (GST_ELEMENT (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)) {
GST_ERROR_OBJECT (GST_ELEMENT (avi),
"Not an ix## chunk (%" GST_FOURCC_FORMAT ")",
GST_FOURCC_ARGS (tag));
gst_buffer_unref (buf);
continue;
}
if (!gst_avi_demux_parse_subindex (GST_ELEMENT (avi), buf, stream, &list))
continue;
if (list) {
*alloc_list = g_list_append (*alloc_list, list->data);
*index = g_list_concat (*index, list);
}
}
g_free (stream->indexes);
stream->indexes = NULL;
}
}
/**
* gst_avi_demux_parse_stream:
* @element: 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 (GstElement * element, GstBuffer * buf)
{
GstAviDemux *avi = GST_AVI_DEMUX (element);
avi_stream_context *stream = &avi->stream[avi->num_streams];
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
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;
GST_DEBUG_OBJECT (element, "Parsing stream");
/* read strh */
if (!buf || !gst_riff_parse_chunk (element, buf, &offset, &tag, &sub) ||
tag != GST_RIFF_TAG_strh) {
GST_ERROR_OBJECT (element,
"Failed to find strh chunk (tag: %" GST_FOURCC_FORMAT ")",
buf ? GST_BUFFER_SIZE (buf) : 0, GST_FOURCC_ARGS (tag));
goto fail;
} else if (!gst_riff_parse_strh (element, sub, &stream->strh))
goto fail;
/* read strf */
if (!gst_riff_parse_chunk (element, buf, &offset, &tag, &sub) ||
tag != GST_RIFF_TAG_strf) {
GST_ERROR_OBJECT (element,
"Failed to find strh chunk (size: %d, tag: %"
GST_FOURCC_FORMAT ")", buf ? GST_BUFFER_SIZE (buf) : 0,
GST_FOURCC_ARGS (tag));
goto fail;
} else {
gboolean res = FALSE;
switch (stream->strh->type) {
case GST_RIFF_FCC_vids:
res = gst_riff_parse_strf_vids (element, sub,
&stream->strf.vids, &stream->extradata);
break;
case GST_RIFF_FCC_auds:
res = gst_riff_parse_strf_auds (element, sub,
&stream->strf.auds, &stream->extradata);
break;
case GST_RIFF_FCC_iavs:
res = gst_riff_parse_strf_iavs (element, sub,
&stream->strf.iavs, &stream->extradata);
break;
default:
GST_ERROR_OBJECT (element,
"Don´t know how to handle stream type %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (stream->strh->type));
break;
}
if (!res)
goto fail;
}
/* read strd/strn */
while (gst_riff_parse_chunk (element, buf, &offset, &tag, &sub)) {
switch (tag) {
case GST_RIFF_TAG_strd:
if (stream->initdata)
gst_buffer_unref (stream->initdata);
stream->initdata = sub;
break;
case GST_RIFF_TAG_strn:
g_free (stream->name);
stream->name = g_new (gchar, GST_BUFFER_SIZE (sub) + 1);
memcpy (stream->name, GST_BUFFER_DATA (sub), GST_BUFFER_SIZE (sub));
stream->name[GST_BUFFER_SIZE (sub)] = '\0';
gst_buffer_unref (sub);
sub = NULL;
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 (element, sub, &stream->indexes);
break;
}
GST_WARNING_OBJECT (element,
"Unknown stream header tag %" GST_FOURCC_FORMAT ", ignoring",
GST_FOURCC_ARGS (tag));
/* fall-through */
case GST_RIFF_TAG_JUNK:
gst_buffer_unref (sub);
sub = NULL;
break;
}
}
/* 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);
}
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;
}
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;
}
/* set proper settings and add it */
if (stream->pad)
gst_object_unref (stream->pad);
pad = stream->pad = gst_pad_new_from_template (templ, padname);
stream->last_flow = GST_FLOW_OK;
stream->idx_duration = GST_CLOCK_TIME_NONE;
g_free (padname);
gst_pad_use_fixed_caps (pad);
#if 0
gst_pad_set_formats_function (pad, gst_avi_demux_get_src_formats);
#endif
gst_pad_set_event_function (pad, gst_avi_demux_handle_src_event);
gst_pad_set_query_type_function (pad, gst_avi_demux_get_src_query_types);
gst_pad_set_query_function (pad, gst_avi_demux_handle_src_query);
stream->num = avi->num_streams;
stream->total_bytes = 0;
stream->total_frames = 0;
stream->current_frame = 0;
stream->current_byte = 0;
stream->current_entry = -1;
gst_pad_set_element_private (pad, stream);
avi->num_streams++;
gst_pad_set_caps (pad, caps);
gst_pad_set_active (pad, TRUE);
gst_element_add_pad (GST_ELEMENT (avi), pad);
GST_LOG_OBJECT (element, "Added pad %s with caps %" GST_PTR_FORMAT,
GST_PAD_NAME (pad), caps);
if (codec_name) {
GstTagList *list = gst_tag_list_new ();
gst_tag_list_add (list, GST_TAG_MERGE_APPEND, tag_name, codec_name, NULL);
gst_element_found_tags_for_pad (GST_ELEMENT (avi), pad, list);
g_free (codec_name);
}
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 (stream->strh);
g_free (stream->strf.data);
g_free (stream->name);
g_free (stream->indexes);
if (stream->initdata)
gst_buffer_unref (stream->initdata);
if (stream->extradata)
gst_buffer_unref (stream->extradata);
memset (stream, 0, sizeof (avi_stream_context));
avi->num_streams++;
return FALSE;
}
}
/**
* gst_avi_demux_parse_odml:
* @element: 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 (GstElement * element, GstBuffer * buf)
{
GstAviDemux *avi = GST_AVI_DEMUX (element);
guint32 tag = 0;
guint offset = 4;
GstBuffer *sub = NULL;
while (gst_riff_parse_chunk (element, buf, &offset, &tag, &sub)) {
switch (tag) {
case GST_RIFF_TAG_dmlh:{
gst_riff_dmlh dmlh, *_dmlh;
if (sub && (GST_BUFFER_SIZE (sub) < sizeof (gst_riff_dmlh))) {
GST_ERROR_OBJECT (element,
"DMLH entry is too small (%d bytes, %d needed)",
GST_BUFFER_SIZE (buf), (int) sizeof (gst_riff_dmlh));
gst_buffer_unref (sub);
sub = NULL;
break;
}
_dmlh = (gst_riff_dmlh *) GST_BUFFER_DATA (buf);
dmlh.totalframes = GUINT32_FROM_LE (_dmlh->totalframes);
GST_INFO_OBJECT (element, "dmlh tag found:");
GST_INFO_OBJECT (element, " totalframes: %u", dmlh.totalframes);
avi->avih->tot_frames = dmlh.totalframes;
if (sub) {
gst_buffer_unref (sub);
sub = NULL;
}
break;
}
default:
GST_WARNING_OBJECT (element,
"Unknown tag %" GST_FOURCC_FORMAT " in ODML header",
GST_FOURCC_ARGS (tag));
/* fall-through */
case GST_RIFF_TAG_JUNK:
if (sub) {
gst_buffer_unref (sub);
sub = NULL;
}
break;
}
}
if (buf)
gst_buffer_unref (buf);
}
/**
* gst_avi_demux_parse_index:
* @element: calling element (used for debugging/errors).
* @buf: buffer containing the full index.
* @entries_list: list (returned by this function) containing the index
* entries parsed from the buffer. The first in the list
* is also a pointer to the allocated data and should be
* free'ed at some point.
*
* Read index entries from the provided buffer.
*/
static void
gst_avi_demux_parse_index (GstElement * element,
GstBuffer * buf, GList ** _entries_list)
{
GstAviDemux *avi = GST_AVI_DEMUX (element);
guint64 pos_before = avi->offset;
gst_avi_index_entry *entries = NULL;
guint8 *data;
GList *entries_list = NULL;
guint i, num, n;
if (!buf) {
*_entries_list = NULL;
return;
}
data = GST_BUFFER_DATA (buf);
num = GST_BUFFER_SIZE (buf) / sizeof (gst_riff_index_entry);
entries = g_new (gst_avi_index_entry, num);
for (i = 0, n = 0; i < num; i++) {
gst_riff_index_entry entry, *_entry;
avi_stream_context *stream;
gint stream_nr;
gst_avi_index_entry *target;
GstFormat format;
gint64 ts;
_entry = &((gst_riff_index_entry *) data)[i];
entry.id = GUINT32_FROM_LE (_entry->id);
entry.offset = GUINT32_FROM_LE (_entry->offset);
entry.flags = GUINT32_FROM_LE (_entry->flags);
entry.size = GUINT32_FROM_LE (_entry->size);
target = &entries[n];
if (entry.id == GST_RIFF_rec || entry.id == 0 ||
(entry.offset == 0 && n > 0))
continue;
stream_nr = CHUNKID_TO_STREAMNR (entry.id);
if (stream_nr >= avi->num_streams || stream_nr < 0) {
GST_WARNING_OBJECT (element,
"Index entry %d has invalid stream nr %d", i, stream_nr);
continue;
}
target->stream_nr = stream_nr;
stream = &avi->stream[stream_nr];
target->index_nr = i;
target->flags = entry.flags;
target->size = entry.size;
target->offset = entry.offset + 8;
/* figure out if the index is 0 based or relative to the MOVI start */
if (n == 0) {
if (target->offset < pos_before)
avi->index_offset = pos_before + 8;
else
avi->index_offset = 0;
}
target->bytes_before = stream->total_bytes;
target->frames_before = stream->total_frames;
format = GST_FORMAT_TIME;
if (stream->strh->type == GST_RIFF_FCC_auds) {
/* all audio frames are keyframes */
target->flags |= GST_RIFF_IF_KEYFRAME;
}
if (stream->strh->samplesize && stream->strh->type == GST_RIFF_FCC_auds) {
/* constant rate stream */
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES,
stream->total_bytes, &format, &ts);
target->ts = ts;
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES,
stream->total_bytes + target->size, &format, &ts);
target->dur = ts;
} else {
/* VBR stream */
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT,
stream->total_frames, &format, &ts);
target->ts = ts;
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT,
stream->total_frames + 1, &format, &ts);
target->dur = ts;
}
target->dur -= target->ts;
stream->total_bytes += target->size;
stream->total_frames++;
GST_DEBUG ("Adding index entry %d (%d) for stream %d of size %u "
"at offset %" G_GUINT64_FORMAT " and time %" GST_TIME_FORMAT,
target->index_nr, stream->total_frames - 1,
target->stream_nr, target->size, target->offset,
GST_TIME_ARGS (target->ts));
entries_list = g_list_prepend (entries_list, target);
n++;
}
*_entries_list = g_list_reverse (entries_list);
gst_buffer_unref (buf);
}
/**
* gst_avi_demux_stream_index:
* @avi: avi demuxer object.
* @index: list of index entries, returned by this function.
* @alloc_list: list of allocated data, returned by this function.
*
* Seeks to index and reads it.
*/
static void
gst_avi_demux_stream_index (GstAviDemux * avi,
GList ** index, GList ** alloc_list)
{
guint64 offset = avi->offset;
GstBuffer *buf;
guint32 tag;
gint i;
*alloc_list = NULL;
*index = NULL;
/* get position */
if (gst_pad_pull_range (avi->sinkpad, offset, 8, &buf) != GST_FLOW_OK)
return;
else if (!buf || GST_BUFFER_SIZE (buf) < 8) {
if (buf)
gst_buffer_unref (buf);
return;
}
offset += 8 + GST_READ_UINT32_LE (GST_BUFFER_DATA (buf) + 4);
gst_buffer_unref (buf);
/* get size */
if (gst_riff_read_chunk (GST_ELEMENT (avi),
avi->sinkpad, &offset, &tag, &buf) != GST_FLOW_OK)
return;
else if (tag != GST_RIFF_TAG_idx1) {
GST_ERROR_OBJECT (avi,
"No index data after movi chunk, but %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (tag));
gst_buffer_unref (buf);
return;
}
gst_avi_demux_parse_index (GST_ELEMENT (avi), buf, index);
if (*index)
*alloc_list = g_list_append (*alloc_list, (*index)->data);
/* debug our indexes */
for (i = 0; i < avi->num_streams; i++) {
avi_stream_context *stream;
stream = &avi->stream[i];
GST_DEBUG_OBJECT (avi, "stream %u: %u frames, %" G_GINT64_FORMAT " bytes",
i, stream->total_frames, stream->total_bytes);
}
return;
}
#if 0
/*
* Sync to next data chunk.
*/
static gboolean
gst_avi_demux_skip (GstAviDemux * avi, gboolean prevent_eos)
{
GstRiffRead *riff = GST_RIFF_READ (avi);
if (prevent_eos) {
guint64 pos, length;
guint size;
guint8 *data;
pos = gst_bytestream_tell (riff->bs);
length = gst_bytestream_length (riff->bs);
if (pos + 8 > length)
return FALSE;
if (gst_bytestream_peek_bytes (riff->bs, &data, 8) != 8)
return FALSE;
size = GST_READ_UINT32_LE (&data[4]);
if (size & 1)
size++;
/* Note, we're going to skip which might involve seeks. Therefore,
* we need 1 byte more! */
if (pos + 8 + size >= length)
return FALSE;
}
return gst_riff_read_skip (riff);
}
static gboolean
gst_avi_demux_sync (GstAviDemux * avi, guint32 * ret_tag, gboolean prevent_eos)
{
GstRiffRead *riff = GST_RIFF_READ (avi);
guint32 tag;
guint64 length = gst_bytestream_length (riff->bs);
if (prevent_eos && gst_bytestream_tell (riff->bs) + 12 >= length)
return FALSE;
/* peek first (for the end of this 'list/movi' section) */
if (!(tag = gst_riff_peek_tag (riff, &avi->level_up)))
return FALSE;
/* if we're at top-level, we didn't read the 'movi'
* list tag yet. This can also be 'AVIX' in case of
* openDML-2.0 AVI files. Lastly, it might be idx1,
* in which case we skip it so we come at EOS. */
while (1) {
if (prevent_eos && gst_bytestream_tell (riff->bs) + 12 >= length)
return FALSE;
if (!(tag = gst_riff_peek_tag (riff, NULL)))
return FALSE;
switch (tag) {
case GST_RIFF_TAG_LIST:
if (!(tag = gst_riff_peek_list (riff)))
return FALSE;
switch (tag) {
case GST_RIFF_LIST_AVIX:
if (!gst_riff_read_list (riff, &tag))
return FALSE;
break;
case GST_RIFF_LIST_movi:
if (!gst_riff_read_list (riff, &tag))
return FALSE;
/* fall-through */
case GST_RIFF_rec:
goto done;
default:
GST_WARNING ("Unknown list %" GST_FOURCC_FORMAT " before AVI data",
GST_FOURCC_ARGS (tag));
/* fall-through */
case GST_RIFF_TAG_JUNK:
if (!gst_avi_demux_skip (avi, prevent_eos))
return FALSE;
break;
}
break;
default:
if ((tag & 0xff) >= '0' &&
(tag & 0xff) <= '9' &&
((tag >> 8) & 0xff) >= '0' && ((tag >> 8) & 0xff) <= '9') {
goto done;
}
/* pass-through */
case GST_RIFF_TAG_idx1:
case GST_RIFF_TAG_JUNK:
if (!gst_avi_demux_skip (avi, prevent_eos)) {
return FALSE;
}
break;
}
}
done:
/* And then, we get the data */
if (prevent_eos && gst_bytestream_tell (riff->bs) + 12 >= length)
return FALSE;
if (!(tag = gst_riff_peek_tag (riff, NULL)))
return FALSE;
/* Support for rec-list files */
switch (tag) {
case GST_RIFF_TAG_LIST:
if (!(tag = gst_riff_peek_list (riff)))
return FALSE;
if (tag == GST_RIFF_rec) {
/* Simply skip the list */
if (!gst_riff_read_list (riff, &tag))
return FALSE;
if (!(tag = gst_riff_peek_tag (riff, NULL)))
return FALSE;
}
break;
case GST_RIFF_TAG_JUNK:
gst_avi_demux_skip (avi, prevent_eos);
return FALSE;
}
if (ret_tag)
*ret_tag = tag;
return TRUE;
}
#endif
/**
* 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;
if ((res = gst_pad_pull_range (avi->sinkpad, offset, 8, &buf)) != GST_FLOW_OK)
goto beach;
if (GST_BUFFER_SIZE (buf) != 8)
return GST_FLOW_ERROR;
*tag = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf));
*size = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf) + 4);
gst_buffer_unref (buf);
GST_LOG_OBJECT (avi,
"Tag[%" GST_FOURCC_FORMAT "] (size:%d) %lld -- %lld",
GST_FOURCC_ARGS (*tag), *size, offset, offset + (guint64) * size);
beach:
return res;
}
/**
* 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 siz;
GstFlowReturn res = GST_FLOW_OK;
while (1) {
if ((res = gst_avi_demux_peek_tag (avi, off, tag, &siz)) != GST_FLOW_OK)
break;
if (*tag == GST_RIFF_TAG_LIST)
off += 8;
else if (*tag == GST_RIFF_LIST_movi)
off += 4;
else {
*offset = off + 8;
*size = siz;
break;
}
}
return res;
}
/*
* Scan the file for all chunks to "create" a new index.
* Return value indicates if we can continue reading the stream. It
* does not say anything about whether we created an index.
*
* pull-range based
*/
static gboolean
gst_avi_demux_stream_scan (GstAviDemux * avi,
GList ** index, GList ** alloc_list)
{
GstFlowReturn res;
gst_avi_index_entry *entry, *entries = NULL;
avi_stream_context *stream;
GstFormat format = GST_FORMAT_BYTES;
guint64 pos = avi->offset;
guint64 length;
gint64 tmplength;
guint32 tag;
GstPad *peer;
GList *list = NULL;
guint index_size = 0;
/* FIXME:
* - implement non-seekable source support.
*/
GST_LOG_OBJECT (avi, "Creating index %s existing index",
(*index) ? "with" : "without");
if (!(peer = gst_pad_get_peer (avi->sinkpad)))
return FALSE;
if (!(gst_pad_query_duration (peer, &format, &tmplength)))
return FALSE;
length = tmplength;
gst_object_unref (peer);
if (*index) {
entry = g_list_last (*index)->data;
pos = entry->offset + avi->index_offset + entry->size;
if (entry->size & 1)
pos++;
if (pos < length) {
GST_LOG ("Incomplete index, seeking to last valid entry @ %"
G_GUINT64_FORMAT " of %" G_GUINT64_FORMAT " (%"
G_GUINT64_FORMAT "+%u)", pos, length, entry->offset, entry->size);
} else {
return TRUE;
}
}
while (1) {
gint stream_nr;
guint size;
gint64 tmpts, tmpdur;
if ((res =
gst_avi_demux_next_data_buffer (avi, &pos, &tag,
&size)) != GST_FLOW_OK)
break;
stream_nr = CHUNKID_TO_STREAMNR (tag);
if (stream_nr < 0 || stream_nr >= avi->num_streams)
continue;
stream = &avi->stream[stream_nr];
/* pre-allocate */
if (index_size % 1024 == 0) {
entries = g_new (gst_avi_index_entry, 1024);
*alloc_list = g_list_prepend (*alloc_list, entries);
}
entry = &entries[index_size % 1024];
entry->index_nr = index_size++;
entry->stream_nr = stream_nr;
entry->flags = GST_RIFF_IF_KEYFRAME;
entry->offset = pos - avi->index_offset;
entry->size = size;
/* timestamps */
if (stream->strh->samplesize && stream->strh->type == GST_RIFF_FCC_auds) {
format = GST_FORMAT_TIME;
/* constant rate stream */
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES,
stream->total_bytes, &format, &tmpts);
entry->ts = tmpts;
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES,
stream->total_bytes + entry->size, &format, &tmpdur);
entry->dur = tmpdur;
} else {
format = GST_FORMAT_TIME;
/* VBR stream */
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT,
stream->total_frames, &format, &tmpts);
entry->ts = tmpts;
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT,
stream->total_frames + 1, &format, &tmpdur);
entry->dur = tmpdur;
}
entry->dur -= entry->ts;
/* stream position */
entry->bytes_before = stream->total_bytes;
stream->total_bytes += entry->size;
entry->frames_before = stream->total_frames;
stream->total_frames++;
list = g_list_prepend (list, entry);
GST_DEBUG_OBJECT (avi, "Added index entry %d (in stream: %d), offset %"
G_GUINT64_FORMAT ", time %" GST_TIME_FORMAT " for stream %d",
index_size - 1, entry->frames_before, entry->offset,
GST_TIME_ARGS (entry->ts), entry->stream_nr);
/* update position */
pos += ((size + 1) & ~1);
if (pos > length) {
GST_WARNING_OBJECT (avi,
"Stopping index lookup since we are further than EOF");
break;
}
}
#if 0
while (gst_avi_demux_sync (avi, &tag, TRUE)) {
gint stream_nr = CHUNKID_TO_STREAMNR (tag);
guint8 *data;
GstFormat format = GST_FORMAT_TIME;
if (stream_nr < 0 || stream_nr >= avi->num_streams)
goto next;
stream = &avi->stream[stream_nr];
/* get chunk size */
if (gst_bytestream_peek_bytes (riff->bs, &data, 8) != 8)
goto next;
/* fill in */
entry->index_nr = index_size++;
entry->stream_nr = stream_nr;
entry->flags = GST_RIFF_IF_KEYFRAME;
entry->offset = gst_bytestream_tell (riff->bs) + 8 - avi->index_offset;
entry->size = GST_READ_UINT32_LE (&data[4]);
/* timestamps */
if (stream->strh->samplesize && stream->strh->type == GST_RIFF_FCC_auds) {
/* constant rate stream */
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES,
stream->total_bytes, &format, &entry->ts);
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES,
stream->total_bytes + entry->size, &format, &entry->dur);
} else {
/* VBR stream */
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT,
stream->total_frames, &format, &entry->ts);
gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT,
stream->total_frames + 1, &format, &entry->dur);
}
entry->dur -= entry->ts;
/* stream position */
entry->bytes_before = stream->total_bytes;
stream->total_bytes += entry->size;
entry->frames_before = stream->total_frames;
stream->total_frames++;
list = g_list_prepend (list, entry);
GST_DEBUG_OBJECT (avi, "Added index entry %d (in stream: %d), offset %"
G_GUINT64_FORMAT ", time %" GST_TIME_FORMAT " for stream %d",
index_size - 1, entry->frames_before, entry->offset,
GST_TIME_ARGS (entry->ts), entry->stream_nr);
next:
if (!gst_avi_demux_skip (avi, TRUE))
break;
}
/* seek back */
if (!(event = gst_riff_read_seek (riff, pos))) {
g_list_free (list);
return FALSE;
}
gst_event_unref (event);
#endif
GST_LOG_OBJECT (avi, "index created, %d items", index_size);
*index = g_list_concat (*index, g_list_reverse (list));
return TRUE;
}
/*
* Massage index.
* We're going to go over each entry in the index and finetune
* some things we don't like about AVI. For example, a single
* chunk might be too long. Also, individual streams might be
* out-of-sync. In the first case, we cut the chunk in several
* smaller pieces. In the second case, we re-order chunk reading
* order. The end result should be a smoother playing AVI.
*/
static gint
sort (gst_avi_index_entry * a, gst_avi_index_entry * b)
{
if (a->ts > b->ts)
return 1;
else if (a->ts < b->ts)
return -1;
else
return a->stream_nr - b->stream_nr;
}
static void
gst_avi_demux_massage_index (GstAviDemux * avi,
GList * list, GList * alloc_list)
{
gst_avi_index_entry *entry;
avi_stream_context *stream;
gint i;
GList *one;
GST_LOG ("Starting index massage");
/* init frames */
for (i = 0; i < avi->num_streams; i++) {
GstFormat fmt = GST_FORMAT_TIME;
gint64 delay = 0;
stream = &avi->stream[i];
if (stream->strh->type == GST_RIFF_FCC_vids) {
if (!gst_avi_demux_src_convert (stream->pad,
GST_FORMAT_DEFAULT, stream->strh->init_frames, &fmt, &delay)) {
delay = 0;
}
} else {
if (!gst_avi_demux_src_convert (stream->pad,
GST_FORMAT_DEFAULT, stream->strh->init_frames, &fmt, &delay)) {
delay = 0;
}
}
GST_LOG ("Adding init_time=%" GST_TIME_FORMAT " to stream %d",
GST_TIME_ARGS (delay), i);
for (one = list; one != NULL; one = one->next) {
entry = one->data;
if (entry->stream_nr == i)
entry->ts += delay;
}
}
GST_LOG ("I'm now going to cut large chunks into smaller pieces");
/* cut chunks in small (seekable) pieces */
for (i = 0; i < avi->num_streams; i++) {
if (avi->stream[i].total_frames != 1)
continue;
for (one = list; one != NULL; one = one->next) {
entry = one->data;
if (entry->stream_nr != i)
continue;
#define MAX_DURATION (GST_SECOND / 2)
/* check for max duration of a single buffer. I suppose that
* the allocation of index entries could be improved. */
stream = &avi->stream[entry->stream_nr];
if (entry->dur > MAX_DURATION && stream->strh->type == GST_RIFF_FCC_auds) {
guint32 ideal_size = stream->strf.auds->av_bps / 10;
gst_avi_index_entry *entries;
gint old_size, num_added;
GList *one2;
/* copy index */
old_size = entry->size;
num_added = (entry->size - 1) / ideal_size;
avi->index_size += num_added;
entries = g_malloc (sizeof (gst_avi_index_entry) * num_added);
alloc_list = g_list_prepend (alloc_list, entries);
for (one2 = one->next; one2 != NULL; one2 = one2->next) {
gst_avi_index_entry *entry2 = one2->data;
entry2->index_nr += num_added;
if (entry2->stream_nr == entry->stream_nr)
entry2->frames_before += num_added;
}
/* new sized index chunks */
for (i = 0; i < num_added + 1; i++) {
gst_avi_index_entry *entry2;
if (i == 0) {
entry2 = entry;
} else {
entry2 = &entries[i - 1];
list = g_list_insert_before (list, one->next, entry2);
entry = one->data;
one = one->next;
memcpy (entry2, entry, sizeof (gst_avi_index_entry));
}
if (old_size >= ideal_size) {
entry2->size = ideal_size;
old_size -= ideal_size;
} else {
entry2->size = old_size;
}
entry2->dur = GST_SECOND * entry2->size / stream->strf.auds->av_bps;
if (i != 0) {
entry2->index_nr++;
entry2->ts += entry->dur;
entry2->offset += entry->size;
entry2->bytes_before += entry->size;
entry2->frames_before++;
}
}
}
}
}
GST_LOG ("I'm now going to reorder the index entries for time");
/* re-order for time */
list = g_list_sort (list, (GCompareFunc) sort);
GST_LOG ("Filling in index array");
avi->index_size = g_list_length (list);
avi->index_entries = g_new (gst_avi_index_entry, avi->index_size);
for (i = 0, one = list; one != NULL; one = one->next, i++) {
entry = one->data;
memcpy (&avi->index_entries[i], entry, sizeof (gst_avi_index_entry));
avi->index_entries[i].index_nr = i;
}
GST_LOG ("Freeing original index list");
g_list_foreach (alloc_list, (GFunc) g_free, NULL);
g_list_free (alloc_list);
g_list_free (list);
for (i = 0; i < avi->num_streams; i++) {
GST_LOG ("Stream %d, %d frames, %" G_GUINT64_FORMAT " bytes", i,
avi->stream[i].total_frames, avi->stream[i].total_bytes);
}
GST_LOG ("Index massaging done");
}
static void
gst_avi_demux_calculate_durations_from_index (GstAviDemux * avi)
{
gst_avi_index_entry *entry;
GstClockTime end_time = GST_CLOCK_TIME_NONE;
gint stream, i;
/* we assume all streams start at a timestamp of 0 for now */
for (stream = 0; stream < avi->num_streams; ++stream) {
i = 0;
while ((entry = gst_avi_demux_index_next (avi, stream, i))) {
end_time = entry->ts + entry->dur;
++i;
}
if (GST_CLOCK_TIME_IS_VALID (end_time)) {
avi->stream[stream].idx_duration = end_time;
GST_INFO ("Stream %d duration according to index: %" GST_TIME_FORMAT,
stream, GST_TIME_ARGS (avi->stream[stream].idx_duration));
}
}
}
static gboolean
gst_avi_demux_send_event (GstAviDemux * avi, GstEvent * event)
{
gint i;
for (i = 0; i < avi->num_streams; i++) {
avi_stream_context *stream = &avi->stream[i];
gst_event_ref (event);
gst_pad_push_event (stream->pad, event);
}
gst_event_unref (event);
return TRUE;
}
/*
* Read full AVI headers.
*/
static GstFlowReturn
gst_avi_demux_stream_header (GstAviDemux * avi)
{
GstFlowReturn res;
GstBuffer *buf, *sub = NULL;
guint32 tag;
GList *index = NULL, *alloc = NULL;
guint offset = 4;
/* the header consists of a 'hdrl' LIST tag */
if ((res = gst_riff_read_chunk (GST_ELEMENT (avi), avi->sinkpad,
&avi->offset, &tag, &buf)) != GST_FLOW_OK)
return res;
else if (tag != GST_RIFF_TAG_LIST)
goto no_list;
else if (GST_BUFFER_SIZE (buf) < 4)
goto no_header;
/* 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);
if ((res = gst_riff_read_chunk (GST_ELEMENT (avi), avi->sinkpad,
&avi->offset, &tag, &buf)) != GST_FLOW_OK)
return res;
else if (tag != GST_RIFF_TAG_LIST)
goto no_list;
else if (GST_BUFFER_SIZE (buf) < 4)
goto no_header;
}
/* the hdrl starts with a 'avih' header */
if (!gst_riff_parse_chunk (GST_ELEMENT (avi), buf, &offset, &tag, &sub) ||
tag != GST_RIFF_TAG_avih)
goto no_avih;
else if (!gst_avi_demux_parse_avih (GST_ELEMENT (avi), sub, &avi->avih))
goto invalid_avih;
/* now, read the elements from the header until the end */
while (gst_riff_parse_chunk (GST_ELEMENT (avi), buf, &offset, &tag, &sub)) {
switch (tag) {
case GST_RIFF_TAG_LIST:
if (!sub || GST_BUFFER_SIZE (sub) < 4) {
if (sub) {
gst_buffer_unref (sub);
sub = NULL;
}
break;
}
switch (GST_READ_UINT32_LE (GST_BUFFER_DATA (sub))) {
case GST_RIFF_LIST_strl:
if (!(gst_avi_demux_parse_stream (GST_ELEMENT (avi), sub)))
return GST_FLOW_ERROR;
gst_buffer_unref (sub);
break;
case GST_RIFF_LIST_odml:
gst_avi_demux_parse_odml (GST_ELEMENT (avi), sub);
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:
if (sub) {
gst_buffer_unref (sub);
sub = NULL;
}
break;
}
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:
if (sub) {
gst_buffer_unref (sub);
sub = NULL;
}
break;
}
}
gst_buffer_unref (buf);
/* 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 ...");
/* Now, find the data (i.e. skip all junk between header and data) */
do {
guint size;
guint32 tag, ltag;
if ((res = gst_pad_pull_range (avi->sinkpad, avi->offset,
12, &buf)) != GST_FLOW_OK)
return res;
else if (!buf || GST_BUFFER_SIZE (buf) < 12)
return GST_FLOW_ERROR;
tag = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf));
size = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf) + 4);
ltag = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf) + 8);
gst_buffer_unref (buf);
if (tag == GST_RIFF_TAG_LIST) {
switch (ltag) {
case GST_RIFF_LIST_movi:
goto done;
case GST_RIFF_LIST_INFO:
if ((res = gst_riff_read_chunk (GST_ELEMENT (avi), avi->sinkpad,
&avi->offset, &tag, &buf)) != GST_FLOW_OK)
return res;
else {
GstTagList *t;
sub = gst_buffer_create_sub (buf, 4, GST_BUFFER_SIZE (buf) - 4);
gst_riff_parse_info (GST_ELEMENT (avi), sub, &t);
if (t) {
gst_element_found_tags (GST_ELEMENT (avi), t);
}
if (sub) {
gst_buffer_unref (sub);
sub = NULL;
}
gst_buffer_unref (buf);
}
/* gst_riff_read_chunk() has already advanced avi->offset */
break;
default:
avi->offset += 8 + ((size + 1) & ~1);
break;
}
} else {
avi->offset += 8 + ((size + 1) & ~1);
}
} while (1);
done:
/* create or read stream index (for seeking) */
if (avi->stream[0].indexes != NULL) {
gst_avi_demux_read_subindexes (avi, &index, &alloc);
}
if (!index) {
if (avi->avih->flags & GST_RIFF_AVIH_HASINDEX) {
gst_avi_demux_stream_index (avi, &index, &alloc);
}
/* some indexes are incomplete, continue streaming from there */
if (!index)
gst_avi_demux_stream_scan (avi, &index, &alloc);
}
if (!index)
goto no_index;
gst_avi_demux_massage_index (avi, index, alloc);
gst_avi_demux_calculate_durations_from_index (avi);
/* send initial discont */
avi->segment_start = 0;
avi->segment_stop =
gst_util_uint64_scale_int ((gint64) avi->stream[0].strh->scale *
avi->stream[0].strh->length, GST_SECOND, avi->stream[0].strh->rate);
GST_DEBUG_OBJECT (avi, "segment stop %" G_GINT64_FORMAT, avi->segment_stop);
avi->seek_event = gst_event_new_new_segment
(FALSE, avi->segment_rate, GST_FORMAT_TIME,
avi->segment_start, avi->segment_stop, avi->segment_start);
/* 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_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);
sub = NULL;
}
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)"));
if (sub) {
gst_buffer_unref (sub);
sub = NULL;
}
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:
{
g_list_free (index);
g_list_foreach (alloc, (GFunc) g_free, NULL);
g_list_free (alloc);
GST_ELEMENT_ERROR (avi, STREAM, NOT_IMPLEMENTED, (NULL),
("Could not get/create index"));
return GST_FLOW_ERROR;
}
}
/*
* Handle seek.
*/
static gboolean
gst_avi_demux_handle_seek (GstAviDemux * avi, gboolean update)
{
GstClockTime start_time;
gboolean flush, keyframe;
guint stream;
gst_avi_index_entry *entry;
/* FIXME: if we seek in an openDML file, we will have multiple
* primary levels. Seeking in between those will cause havoc. */
flush = avi->segment_flags & GST_SEEK_FLAG_FLUSH;
keyframe = avi->segment_flags & GST_SEEK_FLAG_KEY_UNIT;
if (flush) {
for (stream = avi->num_streams; stream--;)
gst_pad_push_event (avi->stream[stream].pad,
gst_event_new_flush_start ());
gst_pad_push_event (avi->sinkpad, gst_event_new_flush_start ());
} else
gst_pad_pause_task (avi->sinkpad);
GST_PAD_STREAM_LOCK (avi->sinkpad);
/* fill current_entry according to flags and update */
if (update) {
entry = gst_avi_demux_index_entry_for_time (avi, 0, avi->segment_start,
(guint32) GST_RIFF_IF_KEYFRAME);
if (entry) {
GST_DEBUG_OBJECT (avi,
"Got keyframe entry %d [stream:%d / ts:%" GST_TIME_FORMAT
" / duration:%" GST_TIME_FORMAT "]", entry->index_nr,
entry->stream_nr, GST_TIME_ARGS (entry->ts),
GST_TIME_ARGS (entry->dur));
avi->current_entry = entry->index_nr;
} else {
GST_WARNING_OBJECT (avi,
"Couldn't find AviIndexEntry for time:%" GST_TIME_FORMAT,
GST_TIME_ARGS (avi->segment_start));
}
}
GST_DEBUG ("seek: %" GST_TIME_FORMAT " -- %" GST_TIME_FORMAT
" keyframe seeking:%d update:%d", GST_TIME_ARGS (avi->segment_start),
GST_TIME_ARGS (avi->segment_stop), keyframe, update);
if (keyframe)
start_time = avi->index_entries[avi->current_entry].ts;
else
start_time = avi->segment_start;
avi->seek_event = gst_event_new_new_segment
(!update, avi->segment_rate, GST_FORMAT_TIME,
start_time, avi->segment_stop, start_time);
if (flush) {
for (stream = avi->num_streams; stream--;)
gst_pad_push_event (avi->stream[stream].pad, gst_event_new_flush_stop ());
gst_pad_push_event (avi->sinkpad, gst_event_new_flush_stop ());
}
if (avi->segment_flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT (avi),
gst_message_new_segment_start (GST_OBJECT (avi), GST_FORMAT_TIME,
start_time));
}
gst_pad_start_task (avi->sinkpad, (GstTaskFunction) gst_avi_demux_loop,
avi->sinkpad);
GST_PAD_STREAM_UNLOCK (avi->sinkpad);
return TRUE;
}
/*
* Invert DIB buffers... Takes existing buffer and
* returns either the buffer or a new one (with old
* one dereferenced).
*/
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);
}
static GstBuffer *
gst_avi_demux_invert (avi_stream_context * stream, GstBuffer * buf)
{
GstStructure *s;
gint y, h = stream->strf.vids->height;
gint bpp, stride;
guint8 *tmp = NULL;
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;
}
stride = stream->strf.vids->width * (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 gboolean
gst_avi_demux_all_source_pads_unlinked (GstAviDemux * avi)
{
gint i;
for (i = 0; i < avi->num_streams; ++i) {
if (gst_pad_is_linked (avi->stream[i].pad))
return FALSE;
/* ignore unlinked state if we haven't tried to push on this pad yet */
if (avi->stream[i].last_flow == GST_FLOW_OK)
return FALSE;
}
return TRUE;
}
static GstFlowReturn
gst_avi_demux_process_next_entry (GstAviDemux * avi)
{
GstFlowReturn res;
gboolean processed = FALSE;
do {
if (avi->current_entry >= avi->index_size) {
GST_LOG_OBJECT (avi, "Handled last index entry, setting EOS (%d > %d)",
avi->current_entry, avi->index_size);
goto eos;
} else {
GstBuffer *buf;
gst_avi_index_entry *entry = &avi->index_entries[avi->current_entry++];
avi_stream_context *stream;
if (entry->stream_nr >= avi->num_streams) {
GST_DEBUG_OBJECT (avi,
"Entry has non-existing stream nr %d", entry->stream_nr);
continue;
}
if ((entry->flags & GST_RIFF_IF_KEYFRAME)
&& GST_CLOCK_TIME_IS_VALID (entry->ts)
&& GST_CLOCK_TIME_IS_VALID (avi->segment_stop)
&& (entry->ts > avi->segment_stop)) {
GST_LOG_OBJECT (avi, "Found keyframe after segment,"
" setting EOS (%" GST_TIME_FORMAT " > %" GST_TIME_FORMAT ")",
GST_TIME_ARGS (entry->ts), GST_TIME_ARGS (avi->segment_stop));
goto eos;
}
stream = &avi->stream[entry->stream_nr];
if (entry->size == 0 || !stream->pad) {
GST_DEBUG_OBJECT (avi, "Skipping entry %d (%d, %p)",
avi->current_entry - 1, entry->size, stream->pad);
goto next;
}
if ((res = gst_pad_pull_range (avi->sinkpad, entry->offset +
avi->index_offset, entry->size, &buf)) != GST_FLOW_OK) {
return res;
}
if (GST_BUFFER_SIZE (buf) < entry->size) {
GST_WARNING_OBJECT (avi, "Short read at offset %" G_GUINT64_FORMAT
", only got %d/%d bytes (truncated file?)", entry->offset +
avi->index_offset, GST_BUFFER_SIZE (buf), entry->size);
goto eos;
}
if (stream->strh->fcc_handler == GST_MAKE_FOURCC ('D', 'I', 'B', ' ')) {
buf = gst_avi_demux_invert (stream, buf);
}
if (!(entry->flags & GST_RIFF_IF_KEYFRAME))
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
GST_BUFFER_TIMESTAMP (buf) = entry->ts;
GST_BUFFER_DURATION (buf) = entry->dur;
gst_buffer_set_caps (buf, GST_PAD_CAPS (stream->pad));
GST_DEBUG_OBJECT (avi, "Processing buffer of size %d and time %"
GST_TIME_FORMAT " on pad %s",
GST_BUFFER_SIZE (buf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_PAD_NAME (stream->pad));
res = gst_pad_push (stream->pad, buf);
stream->last_flow = res;
if (res != GST_FLOW_OK && res != GST_FLOW_NOT_LINKED) {
GST_DEBUG_OBJECT (avi, "Flow on pad %s: %s",
GST_PAD_NAME (stream->pad), gst_flow_get_name (res));
return res;
}
processed = TRUE;
next:
stream->current_frame = entry->frames_before + 1;
stream->current_byte = entry->bytes_before + entry->size;
}
} while (!processed);
return GST_FLOW_OK;
eos:
/* handle end-of-stream/segment */
if (avi->segment_flags & GST_SEEK_FLAG_SEGMENT)
gst_element_post_message
(GST_ELEMENT (avi),
gst_message_new_segment_done (GST_OBJECT (avi), GST_FORMAT_TIME,
avi->segment_stop));
else
gst_avi_demux_send_event (avi, gst_event_new_eos ());
return GST_FLOW_WRONG_STATE;
}
/*
* Read data.
*/
static GstFlowReturn
gst_avi_demux_stream_data (GstAviDemux * avi)
{
/* if we have a avi->index_entries[], we don't want to read
* the stream linearly, but seek to the next ts/index_entry. */
//if (avi->index_entries != NULL) {
return gst_avi_demux_process_next_entry (avi);
//}
#if 0
if (!gst_avi_demux_sync (avi, &tag, FALSE))
return FALSE;
stream_nr = CHUNKID_TO_STREAMNR (tag);
if (stream_nr < 0 || stream_nr >= avi->num_streams) {
/* recoverable */
GST_WARNING ("Invalid stream ID %d (%" GST_FOURCC_FORMAT ")",
stream_nr, GST_FOURCC_ARGS (tag));
if (!gst_riff_read_skip (riff))
return FALSE;
} else {
avi_stream_context *stream;
GstClockTime next_ts;
GstFormat format;
GstBuffer *buf;
/* get buffer */
if (!gst_riff_read_data (riff, &tag, &buf))
return FALSE;
/* get time of this buffer */
stream = &avi->stream[stream_nr];
format = GST_FORMAT_TIME;
gst_pad_query (stream->pad, GST_QUERY_POSITION, &format, &next_ts);
/* set delay (if any) */
if (stream->strh->init_frames == stream->current_frame &&
stream->delay == 0)
stream->delay = next_ts;
stream->current_frame++;
stream->current_byte += GST_BUFFER_SIZE (buf);
/* should we skip this data? */
if (stream->skip) {
stream->skip--;
gst_buffer_unref (buf);
} else {
if (!stream->pad || !GST_PAD_IS_USABLE (stream->pad)) {
gst_buffer_unref (buf);
} else {
GstClockTime dur_ts;
if (stream->strh->fcc_handler == GST_MAKE_FOURCC ('D', 'I', 'B', ' ')) {
buf = gst_avi_demux_invert (stream, buf);
}
GST_BUFFER_TIMESTAMP (buf) = next_ts;
gst_pad_query (stream->pad, GST_QUERY_POSITION, &format, &dur_ts);
GST_BUFFER_DURATION (buf) = dur_ts - next_ts;
GST_DEBUG_OBJECT (avi,
"Pushing buffer with time=%" GST_TIME_FORMAT " over pad %s",
GST_TIME_ARGS (next_ts), GST_PAD_NAME (stream->pad));
gst_pad_push (stream->pad, GST_DATA (buf));
}
}
}
return TRUE;
#endif
}
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:
if ((res = gst_avi_demux_stream_init (avi)) != GST_FLOW_OK)
goto pause;
avi->state = GST_AVI_DEMUX_HEADER;
/* fall-through */
case GST_AVI_DEMUX_HEADER:
if ((res = gst_avi_demux_stream_header (avi)) != GST_FLOW_OK)
goto pause;
avi->state = GST_AVI_DEMUX_MOVI;
break;
case GST_AVI_DEMUX_MOVI:
if (avi->seek_event) {
gst_avi_demux_send_event (avi, avi->seek_event);
avi->seek_event = NULL;
}
if ((res = gst_avi_demux_stream_data (avi)) != GST_FLOW_OK) {
GST_DEBUG_OBJECT (avi, "stream_data flow: %s", gst_flow_get_name (res));
goto pause;
}
break;
default:
g_assert_not_reached ();
}
if (gst_avi_demux_all_source_pads_unlinked (avi)) {
GST_DEBUG_OBJECT (avi, "all source pads unlinked, pausing");
goto pause;
}
return;
pause:
GST_LOG_OBJECT (avi, "pausing task");
gst_pad_pause_task (avi->sinkpad);
if (GST_FLOW_IS_FATAL (res)) {
guint stream = avi->num_streams;
/* 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)));
while (stream--) {
if (avi->stream[stream].pad)
gst_pad_push_event (avi->stream[stream].pad, gst_event_new_eos ());
}
}
}
static gboolean
gst_avi_demux_sink_activate (GstPad * sinkpad)
{
if (gst_pad_check_pull_range (sinkpad))
return gst_pad_activate_pull (sinkpad, TRUE);
return FALSE;
}
static gboolean
gst_avi_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)
{
if (active) {
/* if we have a scheduler we can start the task */
gst_pad_start_task (sinkpad, (GstTaskFunction) gst_avi_demux_loop, sinkpad);
} else {
gst_pad_stop_task (sinkpad);
}
return TRUE;
}
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:
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;
}
Reference in a new issue View git blame Copy permalink