/**
* gst_memory_resize:
* @mem: a #GstMemory
* @offset: a new offset
* @size: a new size
*
* Resize the memory region. @mem should be writable and offset + size should be
* less than the maxsize of @mem.
*
* #GST_MEMORY_FLAG_ZERO_PREFIXED and #GST_MEMORY_FLAG_ZERO_PADDED will be
* cleared when offset or padding is increased respectively.
*/
void
gst_memory_resize (GstMemory * mem, gssize offset, gsize size)
{
g_return_if_fail (mem != NULL);
g_return_if_fail (offset >= 0 || mem->offset >= -offset);
g_return_if_fail (size + mem->offset + offset <= mem->maxsize);
/* if we increase the prefix, we can't guarantee it is still 0 filled */
if ((offset > 0) && GST_MEMORY_IS_ZERO_PREFIXED (mem))
GST_MEMORY_FLAG_UNSET (mem, GST_MEMORY_FLAG_ZERO_PREFIXED);
/* if we increase the padding, we can't guarantee it is still 0 filled */
if ((offset + size < mem->size) && GST_MEMORY_IS_ZERO_PADDED (mem))
GST_MEMORY_FLAG_UNSET (mem, GST_MEMORY_FLAG_ZERO_PADDED);
mem->offset += offset;
mem->size = size;
}
static GstFlowReturn
gst_ffmpegauddec_handle_frame (GstAudioDecoder * decoder, GstBuffer * inbuf)
{
GstFFMpegAudDec *ffmpegdec;
GstFFMpegAudDecClass *oclass;
guint8 *data, *bdata;
GstMapInfo map;
gint size, bsize, len, have_data;
GstFlowReturn ret = GST_FLOW_OK;
gboolean do_padding, is_header;
ffmpegdec = (GstFFMpegAudDec *) decoder;
if (G_UNLIKELY (!ffmpegdec->opened))
goto not_negotiated;
if (inbuf == NULL) {
gst_ffmpegauddec_drain (ffmpegdec);
return GST_FLOW_OK;
}
inbuf = gst_buffer_ref (inbuf);
is_header = GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_HEADER);
oclass = (GstFFMpegAudDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
GST_LOG_OBJECT (ffmpegdec,
"Received new data of size %" G_GSIZE_FORMAT ", offset:%" G_GUINT64_FORMAT
", ts:%" GST_TIME_FORMAT ", dur:%" GST_TIME_FORMAT,
gst_buffer_get_size (inbuf), GST_BUFFER_OFFSET (inbuf),
GST_TIME_ARGS (GST_BUFFER_PTS (inbuf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (inbuf)));
/* workarounds, functions write to buffers:
* libavcodec/svq1.c:svq1_decode_frame writes to the given buffer.
* libavcodec/svq3.c:svq3_decode_slice_header too.
* ffmpeg devs know about it and will fix it (they said). */
if (oclass->in_plugin->id == AV_CODEC_ID_SVQ1 ||
oclass->in_plugin->id == AV_CODEC_ID_SVQ3) {
inbuf = gst_buffer_make_writable (inbuf);
}
gst_buffer_map (inbuf, &map, GST_MAP_READ);
bdata = map.data;
bsize = map.size;
if (bsize > 0 && (!GST_MEMORY_IS_ZERO_PADDED (map.memory)
|| (map.maxsize - map.size) < FF_INPUT_BUFFER_PADDING_SIZE)) {
/* add padding */
if (ffmpegdec->padded_size < bsize + FF_INPUT_BUFFER_PADDING_SIZE) {
ffmpegdec->padded_size = bsize + FF_INPUT_BUFFER_PADDING_SIZE;
ffmpegdec->padded = g_realloc (ffmpegdec->padded, ffmpegdec->padded_size);
GST_LOG_OBJECT (ffmpegdec, "resized padding buffer to %d",
ffmpegdec->padded_size);
}
GST_CAT_TRACE_OBJECT (CAT_PERFORMANCE, ffmpegdec,
"Copy input to add padding");
memcpy (ffmpegdec->padded, bdata, bsize);
memset (ffmpegdec->padded + bsize, 0, FF_INPUT_BUFFER_PADDING_SIZE);
bdata = ffmpegdec->padded;
do_padding = TRUE;
} else {
do_padding = FALSE;
}
do {
guint8 tmp_padding[FF_INPUT_BUFFER_PADDING_SIZE];
data = bdata;
size = bsize;
if (do_padding) {
/* add temporary padding */
GST_CAT_TRACE_OBJECT (CAT_PERFORMANCE, ffmpegdec,
"Add temporary input padding");
memcpy (tmp_padding, data + size, FF_INPUT_BUFFER_PADDING_SIZE);
memset (data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
}
/* decode a frame of audio now */
len = gst_ffmpegauddec_frame (ffmpegdec, data, size, &have_data, &ret);
if (do_padding) {
memcpy (data + size, tmp_padding, FF_INPUT_BUFFER_PADDING_SIZE);
}
if (ret != GST_FLOW_OK) {
GST_LOG_OBJECT (ffmpegdec, "breaking because of flow ret %s",
gst_flow_get_name (ret));
/* bad flow return, make sure we discard all data and exit */
bsize = 0;
break;
}
if (len == 0 && have_data == 0) {
/* nothing was decoded, this could be because no data was available or
* because we were skipping frames.
* If we have no context we must exit and wait for more data, we keep the
* data we tried. */
GST_LOG_OBJECT (ffmpegdec, "Decoding didn't return any data, breaking");
break;
} else if (len < 0) {
/* a decoding error happened, we must break and try again with next data. */
GST_LOG_OBJECT (ffmpegdec, "Decoding error, breaking");
bsize = 0;
break;
}
/* prepare for the next round, for codecs with a context we did this
* already when using the parser. */
bsize -= len;
bdata += len;
do_padding = TRUE;
GST_LOG_OBJECT (ffmpegdec, "Before (while bsize>0). bsize:%d , bdata:%p",
bsize, bdata);
} while (bsize > 0);
gst_buffer_unmap (inbuf, &map);
gst_buffer_unref (inbuf);
if (ffmpegdec->outbuf)
ret =
gst_audio_decoder_finish_frame (GST_AUDIO_DECODER (ffmpegdec),
ffmpegdec->outbuf, 1);
else if (len < 0 || is_header)
ret =
gst_audio_decoder_finish_frame (GST_AUDIO_DECODER (ffmpegdec), NULL, 1);
ffmpegdec->outbuf = NULL;
if (bsize > 0) {
GST_DEBUG_OBJECT (ffmpegdec, "Dropping %d bytes of data", bsize);
}
return ret;
/* ERRORS */
not_negotiated:
{
oclass = (GstFFMpegAudDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
GST_ELEMENT_ERROR (ffmpegdec, CORE, NEGOTIATION, (NULL),
("avdec_%s: input format was not set before data start",
oclass->in_plugin->name));
return GST_FLOW_NOT_NEGOTIATED;
}
}
