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ext/ffmpeg/gstffmpegdec.c: Separate buffer handling from actual decoding, handle pending frames (for B-frames and so ...
Original commit message from CVS: * ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_frame), (gst_ffmpegdec_chain): Separate buffer handling from actual decoding, handle pending frames (for B-frames and so on) so we catch the last frames before EOS, prepare for some timestamp changes to make playback of movies with B-frames smoother (not done yet).
This commit is contained in:
Ronald S. Bultje
parent
1b1044122b
commit
f29f652236
2 changed files with 133 additions and 106 deletions
12
ChangeLog
12
ChangeLog
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@ -1,7 +1,15 @@
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2005-01-19 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_frame),
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(gst_ffmpegdec_chain):
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Separate buffer handling from actual decoding, handle pending
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frames (for B-frames and so on) so we catch the last frames
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before EOS, prepare for some timestamp changes to make playback
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of movies with B-frames smoother (not done yet).
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2005-01-18 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_init),
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(gst_ffmpegdec_query), (gst_ffmpegdec_event), (gst_ffmpegdec_open),
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(gst_ffmpegdec_negotiate), (gst_ffmpegdec_chain):
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* ext/ffmpeg/gstffmpegdemux.c: (gst_ffmpegdemux_init),
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(gst_ffmpegdemux_close), (gst_ffmpegdemux_src_query),
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@ -536,17 +536,125 @@ gst_ffmpegdec_negotiate (GstFFMpegDec * ffmpegdec)
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return TRUE;
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}
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static gint
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gst_ffmpegdec_frame (GstFFMpegDec * ffmpegdec,
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guint8 * data, guint size, gint * got_data, guint64 * expected_ts)
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{
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GstFFMpegDecClass *oclass =
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(GstFFMpegDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
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GstBuffer *outbuf = NULL;
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gint have_data, len = 0;
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ffmpegdec->context->frame_number++;
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switch (oclass->in_plugin->type) {
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case CODEC_TYPE_VIDEO:
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len = avcodec_decode_video (ffmpegdec->context,
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ffmpegdec->picture, &have_data, data, size);
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GST_DEBUG ("Decode video: len=%d, have_data=%d", len, have_data);
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if (len >= 0 && have_data > 0) {
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/* libavcodec constantly crashes on stupid buffer allocation
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* errors inside. This drives me crazy, so we let it allocate
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* it's own buffers and copy to our own buffer afterwards... */
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AVPicture pic;
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gint fsize = gst_ffmpeg_avpicture_get_size (ffmpegdec->context->pix_fmt,
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ffmpegdec->context->width, ffmpegdec->context->height);
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outbuf = gst_buffer_new_and_alloc (fsize);
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/* original ffmpeg code does not handle odd sizes correctly.
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* This patched up version does */
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gst_ffmpeg_avpicture_fill (&pic, GST_BUFFER_DATA (outbuf),
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ffmpegdec->context->pix_fmt,
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ffmpegdec->context->width, ffmpegdec->context->height);
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/* the original convert function did not do the right thing, this
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* is a patched up version that adjust widht/height so that the
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* ffmpeg one works correctly. */
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gst_ffmpeg_img_convert (&pic, ffmpegdec->context->pix_fmt,
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(AVPicture *) ffmpegdec->picture,
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ffmpegdec->context->pix_fmt,
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ffmpegdec->context->width,
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ffmpegdec->context->height);
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/* note that ffmpeg sometimes gets the FPS wrong */
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if (GST_CLOCK_TIME_IS_VALID (*expected_ts) &&
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ffmpegdec->context->frame_rate > 0) {
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GST_BUFFER_TIMESTAMP (outbuf) = *expected_ts;
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GST_BUFFER_DURATION (outbuf) = GST_SECOND *
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ffmpegdec->context->frame_rate_base /
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ffmpegdec->context->frame_rate;
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*expected_ts += GST_BUFFER_DURATION (outbuf);
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}
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} else {
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gst_buffer_unref (outbuf);
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}
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break;
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case CODEC_TYPE_AUDIO:
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outbuf = gst_buffer_new_and_alloc (AVCODEC_MAX_AUDIO_FRAME_SIZE);
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len = avcodec_decode_audio (ffmpegdec->context,
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(int16_t *) GST_BUFFER_DATA (outbuf), &have_data, data, size);
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GST_DEBUG ("Decode audio: len=%d, have_data=%d", len, have_data);
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if (len >= 0 && have_data > 0) {
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GST_BUFFER_SIZE (outbuf) = have_data;
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if (GST_CLOCK_TIME_IS_VALID (*expected_ts)) {
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GST_BUFFER_TIMESTAMP (outbuf) = *expected_ts;
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GST_BUFFER_DURATION (outbuf) = (have_data * GST_SECOND) /
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(2 * ffmpegdec->context->channels *
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ffmpegdec->context->sample_rate);
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*expected_ts += GST_BUFFER_DURATION (outbuf);
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}
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} else {
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gst_buffer_unref (outbuf);
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}
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break;
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default:
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g_assert (0);
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break;
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}
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if (len < 0 || have_data < 0) {
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GST_ERROR_OBJECT (ffmpegdec,
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"ffdec_%s: decoding error (len: %d, have_data: %d)",
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oclass->in_plugin->name, len, have_data);
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*got_data = 0;
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return len;
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} else if (len == 0 && have_data == 0) {
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*got_data = 0;
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return 0;
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} else {
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*got_data = 1;
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}
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if (have_data) {
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GST_DEBUG ("Decoded data, now pushing");
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if (!gst_ffmpegdec_negotiate (ffmpegdec)) {
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gst_buffer_unref (outbuf);
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return -1;
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}
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if (GST_PAD_IS_USABLE (ffmpegdec->srcpad))
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gst_pad_push (ffmpegdec->srcpad, GST_DATA (outbuf));
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else
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gst_buffer_unref (outbuf);
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}
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return len;
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}
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static void
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gst_ffmpegdec_chain (GstPad * pad, GstData * _data)
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{
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GstBuffer *inbuf = GST_BUFFER (_data);
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GstBuffer *outbuf = NULL;
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GstFFMpegDec *ffmpegdec = (GstFFMpegDec *) (gst_pad_get_parent (pad));
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GstFFMpegDecClass *oclass =
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(GstFFMpegDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
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guint8 *bdata, *data;
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gint bsize, size, len = 0;
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gint have_data;
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gint bsize, size, len, have_data;
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guint64 expected_ts = GST_BUFFER_TIMESTAMP (inbuf);
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if (!ffmpegdec->opened) {
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@ -586,7 +694,10 @@ gst_ffmpegdec_chain (GstPad * pad, GstData * _data)
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do {
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/* parse, if at all possible */
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if (ffmpegdec->pctx) {
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if (bsize == 0) {
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data = NULL;
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size = 0;
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} else if (ffmpegdec->pctx) {
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gint res;
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res = av_parser_parse (ffmpegdec->pctx, ffmpegdec->context,
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@ -605,111 +716,19 @@ gst_ffmpegdec_chain (GstPad * pad, GstData * _data)
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size = bsize;
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}
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ffmpegdec->context->frame_number++;
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switch (oclass->in_plugin->type) {
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case CODEC_TYPE_VIDEO:
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len = avcodec_decode_video (ffmpegdec->context,
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ffmpegdec->picture, &have_data, data, size);
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GST_DEBUG ("Decode video: len=%d, have_data=%d", len, have_data);
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if (len >= 0 && have_data) {
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/* libavcodec constantly crashes on stupid buffer allocation
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* errors inside. This drives me crazy, so we let it allocate
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* it's own buffers and copy to our own buffer afterwards... */
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AVPicture pic;
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gint fsize = gst_ffmpeg_avpicture_get_size (ffmpegdec->context->pix_fmt,
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ffmpegdec->context->width, ffmpegdec->context->height);
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outbuf = gst_buffer_new_and_alloc (fsize);
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/* original ffmpeg code does not handle odd sizes correctly. This patched
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* up version does */
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gst_ffmpeg_avpicture_fill (&pic, GST_BUFFER_DATA (outbuf),
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ffmpegdec->context->pix_fmt,
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ffmpegdec->context->width, ffmpegdec->context->height);
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/* the original convert function did not do the right thing, this
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* is a patched up version that adjust widht/height so that the
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* ffmpeg one works correctly. */
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gst_ffmpeg_img_convert (&pic, ffmpegdec->context->pix_fmt,
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(AVPicture *) ffmpegdec->picture,
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ffmpegdec->context->pix_fmt,
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ffmpegdec->context->width,
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ffmpegdec->context->height);
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/* note that ffmpeg sometimes gets the FPS wrong */
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if (GST_CLOCK_TIME_IS_VALID (expected_ts) &&
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ffmpegdec->context->frame_rate > 0) {
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GST_BUFFER_TIMESTAMP (outbuf) = expected_ts;
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GST_BUFFER_DURATION (outbuf) = GST_SECOND *
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ffmpegdec->context->frame_rate_base /
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ffmpegdec->context->frame_rate;
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} else {
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GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (inbuf);
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}
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}
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break;
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case CODEC_TYPE_AUDIO:
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outbuf = gst_buffer_new_and_alloc (AVCODEC_MAX_AUDIO_FRAME_SIZE);
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len = avcodec_decode_audio (ffmpegdec->context,
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(int16_t *) GST_BUFFER_DATA (outbuf), &have_data, data, size);
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GST_DEBUG ("Decode audio: len=%d, have_data=%d", len, have_data);
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if (have_data < 0) {
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GST_WARNING_OBJECT (ffmpegdec,
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"FFmpeg error: len %d, have_data: %d < 0 !",
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len, have_data);
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gst_buffer_unref (inbuf);
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return;
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}
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if (len >= 0 && have_data) {
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GST_BUFFER_SIZE (outbuf) = have_data;
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if (GST_CLOCK_TIME_IS_VALID (expected_ts)) {
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GST_BUFFER_TIMESTAMP (outbuf) = expected_ts;
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GST_BUFFER_DURATION (outbuf) = (have_data * GST_SECOND) /
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(2 * ffmpegdec->context->channels *
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ffmpegdec->context->sample_rate);
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expected_ts += GST_BUFFER_DURATION (outbuf);
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}
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} else {
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gst_buffer_unref (outbuf);
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}
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break;
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default:
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g_assert (0);
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break;
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}
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if (len < 0) {
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GST_ERROR_OBJECT (ffmpegdec, "ffdec_%s: decoding error",
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oclass->in_plugin->name);
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if ((len = gst_ffmpegdec_frame (ffmpegdec, data, size,
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&have_data, &expected_ts)) < 0)
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break;
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} else if (len == 0) {
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break;
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}
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if (have_data) {
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GST_DEBUG ("Decoded data, now pushing");
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if (!gst_ffmpegdec_negotiate (ffmpegdec)) {
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gst_buffer_unref (outbuf);
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return;
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}
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if (GST_PAD_IS_USABLE (ffmpegdec->srcpad))
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gst_pad_push (ffmpegdec->srcpad, GST_DATA (outbuf));
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else
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gst_buffer_unref (outbuf);
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}
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if (!ffmpegdec->pctx || ffmpegdec->context->codec_id == CODEC_ID_MP3 ||
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ffmpegdec->context->codec_id == CODEC_ID_MJPEG) {
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if (!ffmpegdec->pctx) {
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bsize -= len;
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bdata += len;
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}
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} while (bsize > 0);
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if (!have_data) {
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break;
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}
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} while (1);
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if ((ffmpegdec->pctx || oclass->in_plugin->id == CODEC_ID_MP3) &&
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bsize > 0) {
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