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avauddec: port to new decoding API

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=792900
This commit is contained in:
Mathieu Duponchelle 2018-07-01 02:21:46 +02:00
parent 8f3bc07e09
commit 6243197c82
1 changed files with 69 additions and 118 deletions
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187
ext/libav/gstavauddec.c
View file

@ -453,25 +453,19 @@ gst_avpacket_init (AVPacket * packet, guint8 * data, guint size)
packet->size = size;
}
static gint
/*
* Returns: whether a frame was decoded
*/
static gboolean
gst_ffmpegauddec_audio_frame (GstFFMpegAudDec * ffmpegdec,
AVCodec * in_plugin, guint8 * data, guint size, gint * have_data,
GstBuffer ** outbuf, GstFlowReturn * ret)
AVCodec * in_plugin, GstBuffer ** outbuf, GstFlowReturn * ret)
{
gint len = -1;
AVPacket packet;
gboolean got_frame = FALSE;
gint res;
GST_DEBUG_OBJECT (ffmpegdec, "size: %d", size);
res = avcodec_receive_frame (ffmpegdec->context, ffmpegdec->frame);
gst_avpacket_init (&packet, data, size);
len =
avcodec_decode_audio4 (ffmpegdec->context, ffmpegdec->frame, have_data,
&packet);
GST_DEBUG_OBJECT (ffmpegdec,
"Decode audio: len=%d, have_data=%d", len, *have_data);
if (len >= 0 && *have_data) {
if (res >= 0) {
gint nsamples, channels, byte_per_sample;
gsize output_size;
@ -479,10 +473,11 @@ gst_ffmpegauddec_audio_frame (GstFFMpegAudDec * ffmpegdec,
ffmpegdec->frame, FALSE)) {
*outbuf = NULL;
*ret = GST_FLOW_NOT_NEGOTIATED;
len = -1;
goto beach;
}
got_frame = TRUE;
channels = ffmpegdec->info.channels;
nsamples = ffmpegdec->frame->nb_samples;
byte_per_sample = ffmpegdec->info.finfo->width / 8;
@ -578,59 +573,45 @@ gst_ffmpegauddec_audio_frame (GstFFMpegAudDec * ffmpegdec,
/* Mark corrupted frames as corrupted */
if (ffmpegdec->frame->flags & AV_FRAME_FLAG_CORRUPT)
GST_BUFFER_FLAG_SET (*outbuf, GST_BUFFER_FLAG_CORRUPTED);
} else {
} else if (res == AVERROR (EAGAIN)) {
*outbuf = NULL;
} else if (res == AVERROR_EOF) { /* Should not happen */
*ret = GST_FLOW_EOS;
GST_WARNING_OBJECT (ffmpegdec,
"Tried to receive frame on a flushed context");
} else if (res < 0) {
*ret = GST_FLOW_ERROR;
GST_ELEMENT_ERROR (ffmpegdec, STREAM, DECODE, ("Decoding problem"),
("Legitimate decoding error"));
}
beach:
av_frame_unref (ffmpegdec->frame);
GST_DEBUG_OBJECT (ffmpegdec, "return flow %d, out %p, len %d",
*ret, *outbuf, len);
return len;
GST_DEBUG_OBJECT (ffmpegdec, "return flow %d, out %p, got_frame %d",
*ret, *outbuf, got_frame);
return got_frame;
}
/* gst_ffmpegauddec_frame:
* ffmpegdec:
* data: pointer to the data to decode
* size: size of data in bytes
* got_data: 0 if no data was decoded, != 0 otherwise.
* in_time: timestamp of data
* in_duration: duration of data
* ret: GstFlowReturn to return in the chain function
*
* Decode the given frame and pushes it downstream.
*
* Returns: Number of bytes used in decoding, -1 on error/failure.
/*
* Returns: whether a frame was decoded
*/
static gint
gst_ffmpegauddec_frame (GstFFMpegAudDec * ffmpegdec,
guint8 * data, guint size, gint * have_data, GstFlowReturn * ret)
static gboolean
gst_ffmpegauddec_frame (GstFFMpegAudDec * ffmpegdec, GstFlowReturn * ret)
{
GstFFMpegAudDecClass *oclass;
GstBuffer *outbuf = NULL;
gint len = 0;
gboolean got_frame = FALSE;
if (G_UNLIKELY (ffmpegdec->context->codec == NULL))
goto no_codec;
GST_LOG_OBJECT (ffmpegdec, "data:%p, size:%d", data, size);
*ret = GST_FLOW_OK;
ffmpegdec->context->frame_number++;
oclass = (GstFFMpegAudDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
len =
gst_ffmpegauddec_audio_frame (ffmpegdec, oclass->in_plugin, data, size,
have_data, &outbuf, ret);
if (len < 0) {
GST_WARNING_OBJECT (ffmpegdec,
"avdec_%s: decoding error (len: %d, have_data: %d)",
oclass->in_plugin->name, len, *have_data);
goto beach;
}
got_frame =
gst_ffmpegauddec_audio_frame (ffmpegdec, oclass->in_plugin, &outbuf, ret);
if (outbuf) {
GST_LOG_OBJECT (ffmpegdec, "Decoded data, now storing buffer %p", outbuf);
@ -644,13 +625,13 @@ gst_ffmpegauddec_frame (GstFFMpegAudDec * ffmpegdec,
}
beach:
return len;
return got_frame;
/* ERRORS */
no_codec:
{
GST_ERROR_OBJECT (ffmpegdec, "no codec context");
return -1;
goto beach;
}
}
@ -662,7 +643,7 @@ gst_ffmpegauddec_drain (GstFFMpegAudDec * ffmpegdec)
oclass = (GstFFMpegAudDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
if (oclass->in_plugin->capabilities & AV_CODEC_CAP_DELAY) {
gint have_data, len;
gboolean got_frame;
GST_LOG_OBJECT (ffmpegdec,
"codec has delay capabilities, calling until libav has drained everything");
@ -670,9 +651,8 @@ gst_ffmpegauddec_drain (GstFFMpegAudDec * ffmpegdec)
do {
GstFlowReturn ret;
len = gst_ffmpegauddec_frame (ffmpegdec, NULL, 0, &have_data, &ret);
} while (len >= 0 && have_data == 1);
got_frame = gst_ffmpegauddec_frame (ffmpegdec, &ret);
} while (got_frame);
avcodec_flush_buffers (ffmpegdec->context);
}
@ -697,11 +677,13 @@ gst_ffmpegauddec_handle_frame (GstAudioDecoder * decoder, GstBuffer * inbuf)
{
GstFFMpegAudDec *ffmpegdec;
GstFFMpegAudDecClass *oclass;
guint8 *data, *bdata;
guint8 *data;
GstMapInfo map;
gint size, bsize, len, have_data;
gint size;
gboolean got_frame;
GstFlowReturn ret = GST_FLOW_OK;
gboolean do_padding, is_header;
gboolean is_header;
AVPacket packet;
ffmpegdec = (GstFFMpegAudDec *) decoder;
@ -736,81 +718,46 @@ gst_ffmpegauddec_handle_frame (GstAudioDecoder * decoder, GstBuffer * inbuf)
gst_buffer_map (inbuf, &map, GST_MAP_READ);
bdata = map.data;
bsize = map.size;
data = map.data;
size = map.size;
if (bsize > 0 && (!GST_MEMORY_IS_ZERO_PADDED (map.memory)
if (size > 0 && (!GST_MEMORY_IS_ZERO_PADDED (map.memory)
|| (map.maxsize - map.size) < AV_INPUT_BUFFER_PADDING_SIZE)) {
/* add padding */
if (ffmpegdec->padded_size < bsize + AV_INPUT_BUFFER_PADDING_SIZE) {
ffmpegdec->padded_size = bsize + AV_INPUT_BUFFER_PADDING_SIZE;
if (ffmpegdec->padded_size < size + AV_INPUT_BUFFER_PADDING_SIZE) {
ffmpegdec->padded_size = size + AV_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, AV_INPUT_BUFFER_PADDING_SIZE);
memcpy (ffmpegdec->padded, data, size);
memset (ffmpegdec->padded + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
bdata = ffmpegdec->padded;
do_padding = TRUE;
} else {
do_padding = FALSE;
data = ffmpegdec->padded;
}
gst_avpacket_init (&packet, data, size);
if (!packet.size)
goto done;
if (avcodec_send_packet (ffmpegdec->context, &packet) < 0) {
goto send_packet_failed;
}
do {
guint8 tmp_padding[AV_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, AV_INPUT_BUFFER_PADDING_SIZE);
memset (data + size, 0, AV_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, AV_INPUT_BUFFER_PADDING_SIZE);
}
got_frame = gst_ffmpegauddec_frame (ffmpegdec, &ret);
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);
} while (got_frame);
gst_buffer_unmap (inbuf, &map);
gst_buffer_unref (inbuf);
@ -819,15 +766,12 @@ gst_ffmpegauddec_handle_frame (GstAudioDecoder * decoder, GstBuffer * inbuf)
ret =
gst_audio_decoder_finish_frame (GST_AUDIO_DECODER (ffmpegdec),
ffmpegdec->outbuf, 1);
else if (len < 0 || is_header)
else if (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);
}
done:
return ret;
/* ERRORS */
@ -837,7 +781,14 @@ not_negotiated:
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;
ret = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
send_packet_failed:
{
GST_WARNING_OBJECT (ffmpegdec, "decoding error");
goto done;
}
}