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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

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/* 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;
}
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