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baseparse: introduce a baseparse frame to serve as context

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... and adjust subclass parsers accordingly
This commit is contained in:
Mark Nauwelaerts 2011-01-10 15:34:48 +01:00
parent 400198b2cd
commit 1c89488c50
8 changed files with 324 additions and 234 deletions
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78
gst/audioparsers/gstaacparse.c
View file

@ -77,10 +77,10 @@ static gboolean gst_aacparse_sink_setcaps (GstBaseParse * parse,
GstCaps * caps);
gboolean gst_aacparse_check_valid_frame (GstBaseParse * parse,
GstBuffer * buffer, guint * size, gint * skipsize);
GstBaseParseFrame * frame, guint * size, gint * skipsize);
GstFlowReturn gst_aacparse_parse_frame (GstBaseParse * parse,
GstBuffer * buffer);
GstBaseParseFrame * frame);
gboolean gst_aacparse_convert (GstBaseParse * parse,
GstFormat src_format,
@ -147,8 +147,6 @@ gst_aacparse_class_init (GstAacParseClass * klass)
parse_class->parse_frame = GST_DEBUG_FUNCPTR (gst_aacparse_parse_frame);
parse_class->check_valid_frame =
GST_DEBUG_FUNCPTR (gst_aacparse_check_valid_frame);
parse_class->get_frame_overhead =
GST_DEBUG_FUNCPTR (gst_aacparse_get_frame_overhead);
}
@ -330,8 +328,8 @@ gst_aacparse_adts_get_frame_len (const guint8 * data)
*/
static gboolean
gst_aacparse_check_adts_frame (GstAacParse * aacparse,
const guint8 * data,
const guint avail, guint * framesize, guint * needed_data)
const guint8 * data, const guint avail, gboolean drain,
guint * framesize, guint * needed_data)
{
if (G_UNLIKELY (avail < 2))
return FALSE;
@ -340,7 +338,7 @@ gst_aacparse_check_adts_frame (GstAacParse * aacparse,
*framesize = gst_aacparse_adts_get_frame_len (data);
/* In EOS mode this is enough. No need to examine the data further */
if (gst_base_parse_get_drain (GST_BASE_PARSE (aacparse))) {
if (drain) {
return TRUE;
}
@ -408,7 +406,8 @@ gst_aacparse_parse_adts_header (GstAacParse * aacparse, const guint8 * data,
*/
static gboolean
gst_aacparse_detect_stream (GstAacParse * aacparse,
const guint8 * data, const guint avail, guint * framesize, gint * skipsize)
const guint8 * data, const guint avail, gboolean drain,
guint * framesize, gint * skipsize)
{
gboolean found = FALSE;
guint need_data = 0;
@ -444,7 +443,7 @@ gst_aacparse_detect_stream (GstAacParse * aacparse,
return FALSE;
}
if (gst_aacparse_check_adts_frame (aacparse, data, avail,
if (gst_aacparse_check_adts_frame (aacparse, data, avail, drain,
framesize, &need_data)) {
gint rate, channels;
@ -568,17 +567,19 @@ gst_aacparse_detect_stream (GstAacParse * aacparse,
*/
gboolean
gst_aacparse_check_valid_frame (GstBaseParse * parse,
GstBuffer * buffer, guint * framesize, gint * skipsize)
GstBaseParseFrame * frame, guint * framesize, gint * skipsize)
{
const guint8 *data;
GstAacParse *aacparse;
gboolean ret = FALSE;
gboolean sync;
GstBuffer *buffer;
aacparse = GST_AACPARSE (parse);
buffer = frame->buffer;
data = GST_BUFFER_DATA (buffer);
sync = gst_base_parse_get_sync (parse);
sync = GST_BASE_PARSE_FRAME_SYNC (frame);
if (aacparse->header_type == DSPAAC_HEADER_ADIF ||
aacparse->header_type == DSPAAC_HEADER_NONE) {
@ -589,13 +590,14 @@ gst_aacparse_check_valid_frame (GstBaseParse * parse,
} else if (aacparse->header_type == DSPAAC_HEADER_NOT_PARSED || sync == FALSE) {
ret = gst_aacparse_detect_stream (aacparse, data, GST_BUFFER_SIZE (buffer),
framesize, skipsize);
GST_BASE_PARSE_FRAME_DRAIN (frame), framesize, skipsize);
} else if (aacparse->header_type == DSPAAC_HEADER_ADTS) {
guint needed_data = 1024;
ret = gst_aacparse_check_adts_frame (aacparse, data,
GST_BUFFER_SIZE (buffer), framesize, &needed_data);
GST_BUFFER_SIZE (buffer), GST_BASE_PARSE_FRAME_DRAIN (frame),
framesize, &needed_data);
if (!ret) {
GST_DEBUG ("buffer didn't contain valid frame");
@ -619,21 +621,39 @@ gst_aacparse_check_valid_frame (GstBaseParse * parse,
*
* Implementation of "parse_frame" vmethod in #GstBaseParse class.
*
* Also determines frame overhead.
* ADTS streams have a 7 byte header in each frame. MP4 and ADIF streams don't have
* a per-frame header.
*
* We're making a couple of simplifying assumptions:
*
* 1. We count Program Configuration Elements rather than searching for them
* in the streams to discount them - the overhead is negligible.
*
* 2. We ignore CRC. This has a worst-case impact of (num_raw_blocks + 1)*16
* bits, which should still not be significant enough to warrant the
* additional parsing through the headers
*
* Returns: GST_FLOW_OK if frame was successfully parsed and can be pushed
* forward. Otherwise appropriate error is returned.
*/
GstFlowReturn
gst_aacparse_parse_frame (GstBaseParse * parse, GstBuffer * buffer)
gst_aacparse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
{
GstAacParse *aacparse;
GstBuffer *buffer;
GstFlowReturn ret = GST_FLOW_OK;
gint rate, channels;
aacparse = GST_AACPARSE (parse);
buffer = frame->buffer;
if (G_UNLIKELY (aacparse->header_type != DSPAAC_HEADER_ADTS))
return ret;
/* see above */
frame->overhead = 7;
gst_aacparse_parse_adts_header (aacparse, GST_BUFFER_DATA (buffer),
&rate, &channels, NULL, NULL);
GST_LOG_OBJECT (aacparse, "rate: %d, chans: %d", rate, channels);
@ -692,33 +712,3 @@ gst_aacparse_stop (GstBaseParse * parse)
GST_DEBUG ("stop");
return TRUE;
}
/**
* gst_aacparse_get_frame_overhead:
* @parse: #GstBaseParse.
* @buffer: #GstBuffer.
*
* Implementation of "get_frame_overhead" vmethod in #GstBaseParse class. ADTS
* streams have a 7 byte header in each frame. MP4 and ADIF streams don't have
* a per-frame header.
*
* We're making a couple of simplifying assumptions:
*
* 1. We count Program Configuration Elements rather than searching for them
* in the streams to discount them - the overhead is negligible.
*
* 2. We ignore CRC. This has a worst-case impact of (num_raw_blocks + 1)*16
* bits, which should still not be significant enough to warrant the
* additional parsing through the headers
*/
gint
gst_aacparse_get_frame_overhead (GstBaseParse * parse, GstBuffer * buffer)
{
GstAacParse *aacparse = GST_AACPARSE (parse);
if (aacparse->header_type == DSPAAC_HEADER_ADTS)
return 7;
else
return 0;
}

20
gst/audioparsers/gstac3parse.c
View file

@ -160,9 +160,9 @@ static void gst_ac3_parse_finalize (GObject * object);
static gboolean gst_ac3_parse_start (GstBaseParse * parse);
static gboolean gst_ac3_parse_stop (GstBaseParse * parse);
static gboolean gst_ac3_parse_check_valid_frame (GstBaseParse * parse,
GstBuffer * buffer, guint * size, gint * skipsize);
GstBaseParseFrame * frame, guint * size, gint * skipsize);
static GstFlowReturn gst_ac3_parse_parse_frame (GstBaseParse * parse,
GstBuffer * buf);
GstBaseParseFrame * frame);
GST_BOILERPLATE (GstAc3Parse, gst_ac3_parse, GstBaseParse, GST_TYPE_BASE_PARSE);
@ -384,11 +384,12 @@ gst_ac3_parse_frame_header (GstAc3Parse * parse, GstBuffer * buf,
}
static gboolean
gst_ac3_parse_check_valid_frame (GstBaseParse * parse, GstBuffer * buf,
guint * framesize, gint * skipsize)
gst_ac3_parse_check_valid_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, guint * framesize, gint * skipsize)
{
GstByteReader reader = GST_BYTE_READER_INIT_FROM_BUFFER (buf);
GstAc3Parse *ac3parse = GST_AC3_PARSE (parse);
GstBuffer *buf = frame->buffer;
GstByteReader reader = GST_BYTE_READER_INIT_FROM_BUFFER (buf);
gint off;
gboolean sync, drain;
@ -421,8 +422,8 @@ gst_ac3_parse_check_valid_frame (GstBaseParse * parse, GstBuffer * buf,
GST_LOG_OBJECT (parse, "got frame");
sync = gst_base_parse_get_sync (parse);
drain = gst_base_parse_get_drain (parse);
sync = GST_BASE_PARSE_FRAME_SYNC (frame);
drain = GST_BASE_PARSE_FRAME_DRAIN (frame);
if (!sync && !drain) {
guint16 word = 0;
@ -451,9 +452,10 @@ gst_ac3_parse_check_valid_frame (GstBaseParse * parse, GstBuffer * buf,
}
static GstFlowReturn
gst_ac3_parse_parse_frame (GstBaseParse * parse, GstBuffer * buf)
gst_ac3_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
{
GstAc3Parse *ac3parse = GST_AC3_PARSE (parse);
GstBuffer *buf = frame->buffer;
guint fsize, rate, chans, blocks, sid;
gboolean eac;
@ -465,7 +467,7 @@ gst_ac3_parse_parse_frame (GstBaseParse * parse, GstBuffer * buf)
if (G_UNLIKELY (sid)) {
GST_LOG_OBJECT (parse, "sid: %d", sid);
GST_BUFFER_FLAG_SET (buf, GST_BASE_PARSE_BUFFER_FLAG_NO_FRAME);
frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NO_FRAME;
}
if (G_UNLIKELY (ac3parse->sample_rate != rate || ac3parse->channels != chans

15
gst/audioparsers/gstamrparse.c
View file

@ -78,10 +78,10 @@ static gboolean gst_amrparse_sink_setcaps (GstBaseParse * parse,
GstCaps * caps);
gboolean gst_amrparse_check_valid_frame (GstBaseParse * parse,
GstBuffer * buffer, guint * framesize, gint * skipsize);
GstBaseParseFrame * frame, guint * framesize, gint * skipsize);
GstFlowReturn gst_amrparse_parse_frame (GstBaseParse * parse,
GstBuffer * buffer);
GstBaseParseFrame * frame);
#define _do_init(bla) \
GST_DEBUG_CATEGORY_INIT (gst_amrparse_debug, "amrparse", 0, \
@ -267,13 +267,15 @@ gst_amrparse_parse_header (GstAmrParse * amrparse,
*/
gboolean
gst_amrparse_check_valid_frame (GstBaseParse * parse,
GstBuffer * buffer, guint * framesize, gint * skipsize)
GstBaseParseFrame * frame, guint * framesize, gint * skipsize)
{
GstBuffer *buffer;
const guint8 *data;
gint fsize, mode, dsize;
GstAmrParse *amrparse;
amrparse = GST_AMRPARSE (parse);
buffer = frame->buffer;
data = GST_BUFFER_DATA (buffer);
dsize = GST_BUFFER_SIZE (buffer);
@ -305,8 +307,8 @@ gst_amrparse_check_valid_frame (GstBaseParse * parse,
* to contain a valid header as well (and there is enough data to
* perform this check)
*/
if (gst_base_parse_get_sync (parse) || gst_base_parse_get_drain (parse) ||
(dsize >= fsize && (data[fsize] & 0x83) == 0)) {
if (GST_BASE_PARSE_FRAME_SYNC (frame) || GST_BASE_PARSE_FRAME_DRAIN (frame)
|| (dsize >= fsize && (data[fsize] & 0x83) == 0)) {
*framesize = fsize;
return TRUE;
}
@ -327,9 +329,8 @@ gst_amrparse_check_valid_frame (GstBaseParse * parse,
* Returns: #GstFlowReturn defining the parsing status.
*/
GstFlowReturn
gst_amrparse_parse_frame (GstBaseParse * parse, GstBuffer * buffer)
gst_amrparse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
{
gst_buffer_set_caps (buffer, GST_PAD_CAPS (parse->srcpad));
return GST_FLOW_OK;
}

220
gst/audioparsers/gstbaseparse.c
View file

@ -352,10 +352,9 @@ static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstBuffer * buffer);
static void gst_base_parse_loop (GstPad * pad);
static gboolean gst_base_parse_check_frame (GstBaseParse * parse,
GstBuffer * buffer, guint * framesize, gint * skipsize);
GstBaseParseFrame * frame, guint * framesize, gint * skipsize);
static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
GstBuffer * buffer);
GstBaseParseFrame * frame);
static gboolean gst_base_parse_sink_eventfunc (GstBaseParse * parse,
GstEvent * event);
@ -504,6 +503,49 @@ gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
GST_DEBUG_OBJECT (parse, "init ok");
}
/**
* gst_base_parse_frame_init:
* @parse: #GstBaseParse.
* @fmt: #GstBaseParseFrame.
*
* Sets a #GstBaseParseFrame to initial state. Currently this means
* all fields are zero-ed.
*/
void
gst_base_parse_frame_init (GstBaseParse * parse, GstBaseParseFrame * frame)
{
memset (frame, 0, sizeof (*frame));
}
/* clear == frame no longer to be used following this */
static void
gst_base_parse_frame_clear (GstBaseParse * parse, GstBaseParseFrame * frame)
{
/* limited for now */
if (frame->buffer) {
gst_buffer_unref (frame->buffer);
frame->buffer = NULL;
}
}
static inline void
gst_base_parse_frame_update (GstBaseParse * parse, GstBaseParseFrame * frame,
GstBuffer * buf)
{
gst_buffer_replace (&frame->buffer, buf);
if (parse->priv->drain) {
frame->flags |= GST_BASE_PARSE_FRAME_FLAG_DRAIN;
} else {
frame->flags &= ~(GST_BASE_PARSE_FRAME_FLAG_DRAIN);
}
/* losing sync is pretty much a discont (and vice versa), no ? */
if (!parse->priv->discont) {
frame->flags |= GST_BASE_PARSE_FRAME_FLAG_SYNC;
} else {
frame->flags &= ~(GST_BASE_PARSE_FRAME_FLAG_SYNC);
}
}
static void
gst_base_parse_reset (GstBaseParse * parse)
{
@ -587,9 +629,9 @@ gst_base_parse_reset (GstBaseParse * parse)
*/
static gboolean
gst_base_parse_check_frame (GstBaseParse * parse,
GstBuffer * buffer, guint * framesize, gint * skipsize)
GstBaseParseFrame * frame, guint * framesize, gint * skipsize)
{
*framesize = GST_BUFFER_SIZE (buffer);
*framesize = GST_BUFFER_SIZE (frame->buffer);
*skipsize = 0;
return TRUE;
}
@ -603,8 +645,10 @@ gst_base_parse_check_frame (GstBaseParse * parse,
* Default callback for parse_frame.
*/
static GstFlowReturn
gst_base_parse_parse_frame (GstBaseParse * parse, GstBuffer * buffer)
gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
{
GstBuffer *buffer = frame->buffer;
if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
GST_CLOCK_TIME_IS_VALID (parse->priv->next_ts)) {
GST_BUFFER_TIMESTAMP (buffer) = parse->priv->next_ts;
@ -1114,23 +1158,22 @@ gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
* running average bitrate of the stream so far.
*/
static void
gst_base_parse_update_bitrates (GstBaseParse * parse, GstBuffer * buffer)
gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
{
/* Only update the tag on a 10 kbps delta */
static const gint update_threshold = 10000;
GstBaseParseClass *klass;
guint64 data_len, frame_dur;
gint overhead = 0, frame_bitrate, old_avg_bitrate;
gint overhead, frame_bitrate, old_avg_bitrate;
gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
GstBuffer *buffer = frame->buffer;
klass = GST_BASE_PARSE_GET_CLASS (parse);
if (klass->get_frame_overhead) {
overhead = klass->get_frame_overhead (parse, buffer);
overhead = frame->overhead;
if (overhead == -1)
return;
}
data_len = GST_BUFFER_SIZE (buffer) - overhead;
parse->priv->data_bytecount += data_len;
@ -1391,11 +1434,16 @@ gst_base_parse_check_media (GstBaseParse * parse)
* Returns: #GstFlowReturn
*/
static GstFlowReturn
gst_base_parse_handle_and_push_buffer (GstBaseParse * parse,
GstBaseParseClass * klass, GstBuffer * buffer)
gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
GstBaseParseClass * klass, GstBaseParseFrame * frame)
{
GstFlowReturn ret;
gint64 offset;
GstBuffer *buffer;
g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
buffer = frame->buffer;
if (parse->priv->discont) {
GST_DEBUG_OBJECT (parse, "marking DISCONT");
@ -1417,7 +1465,11 @@ gst_base_parse_handle_and_push_buffer (GstBaseParse * parse,
/* store offset as it might get overwritten */
offset = GST_BUFFER_OFFSET (buffer);
ret = klass->parse_frame (parse, buffer);
ret = klass->parse_frame (parse, frame);
/* sync */
buffer = frame->buffer;
/* subclass must play nice */
g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
/* check initial frame to determine if subclass/format can provide ts.
* If so, that allows and enables extra seek and duration determining options */
@ -1446,7 +1498,7 @@ gst_base_parse_handle_and_push_buffer (GstBaseParse * parse,
}
/* re-use default handler to add missing metadata as-much-as-possible */
gst_base_parse_parse_frame (parse, buffer);
gst_base_parse_parse_frame (parse, frame);
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
GST_BUFFER_DURATION_IS_VALID (buffer)) {
parse->priv->next_ts =
@ -1468,34 +1520,40 @@ gst_base_parse_handle_and_push_buffer (GstBaseParse * parse,
* frames to decide on the format and queues them internally */
/* convert internal flow to OK and mark discont for the next buffer. */
if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
gst_buffer_unref (buffer);
gst_base_parse_frame_clear (parse, frame);
return GST_FLOW_OK;
} else if (ret != GST_FLOW_OK) {
return ret;
}
return gst_base_parse_push_buffer (parse, buffer);
return gst_base_parse_push_frame (parse, frame);
}
/**
* gst_base_parse_push_buffer:
* gst_base_parse_push_frame:
* @parse: #GstBaseParse.
* @buffer: #GstBuffer.
* @frame: #GstBaseParseFrame.
*
* Pushes the buffer downstream, sends any pending events and
* Pushes the frame downstream, sends any pending events and
* does some timestamp and segment handling.
*
* This must be called with srcpad STREAM_LOCK held.
* This must be called with sinkpad STREAM_LOCK held.
*
* Returns: #GstFlowReturn
*/
GstFlowReturn
gst_base_parse_push_buffer (GstBaseParse * parse, GstBuffer * buffer)
gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
{
GstFlowReturn ret = GST_FLOW_OK;
GstClockTime last_start = GST_CLOCK_TIME_NONE;
GstClockTime last_stop = GST_CLOCK_TIME_NONE;
GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
GstBuffer *buffer;
g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
buffer = frame->buffer;
GST_LOG_OBJECT (parse,
"processing buffer of size %d with ts %" GST_TIME_FORMAT
@ -1505,13 +1563,12 @@ gst_base_parse_push_buffer (GstBaseParse * parse, GstBuffer * buffer)
/* update stats */
parse->priv->bytecount += GST_BUFFER_SIZE (buffer);
if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BASE_PARSE_BUFFER_FLAG_NO_FRAME)) {
if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
parse->priv->framecount++;
if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
}
}
GST_BUFFER_FLAG_UNSET (buffer, GST_BASE_PARSE_BUFFER_FLAG_NO_FRAME);
if (parse->priv->update_interval &&
(parse->priv->framecount % parse->priv->update_interval) == 0)
gst_base_parse_update_duration (parse);
@ -1525,8 +1582,6 @@ gst_base_parse_push_buffer (GstBaseParse * parse, GstBuffer * buffer)
/* should have caps by now */
g_return_val_if_fail (GST_PAD_CAPS (parse->srcpad), GST_FLOW_ERROR);
gst_buffer_set_caps (buffer, GST_PAD_CAPS (parse->srcpad));
/* segment adjustment magic; only if we are running the whole show */
if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
(parse->priv->pad_mode == GST_ACTIVATE_PULL ||
@ -1615,7 +1670,7 @@ gst_base_parse_push_buffer (GstBaseParse * parse, GstBuffer * buffer)
/* update bitrates and optionally post corresponding tags
* (following newsegment) */
gst_base_parse_update_bitrates (parse, buffer);
gst_base_parse_update_bitrates (parse, frame);
if (G_UNLIKELY (parse->priv->pending_events)) {
GList *l;
@ -1627,15 +1682,26 @@ gst_base_parse_push_buffer (GstBaseParse * parse, GstBuffer * buffer)
parse->priv->pending_events = NULL;
}
if (klass->pre_push_buffer)
ret = klass->pre_push_buffer (parse, buffer);
else
ret = GST_BASE_PARSE_FLOW_CLIP;
if (klass->pre_push_frame) {
ret = klass->pre_push_frame (parse, frame);
} else {
frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
}
/* take final ownership of frame buffer */
buffer = frame->buffer;
frame->buffer = NULL;
/* subclass must play nice */
g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
/* decorate */
gst_buffer_set_caps (buffer, GST_PAD_CAPS (parse->srcpad));
parse->priv->seen_keyframe |= parse->priv->is_video &&
!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
if (ret == GST_BASE_PARSE_FLOW_CLIP) {
if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
GST_BUFFER_TIMESTAMP (buffer) >
@ -1693,6 +1759,8 @@ gst_base_parse_push_buffer (GstBaseParse * parse, GstBuffer * buffer)
parse->segment.last_stop < last_stop)
gst_segment_set_last_stop (&parse->segment, GST_FORMAT_TIME, last_stop);
gst_base_parse_frame_clear (parse, frame);
return ret;
}
@ -1879,16 +1947,19 @@ gst_base_parse_chain (GstPad * pad, GstBuffer * buffer)
const guint8 *data;
guint old_min_size = 0, min_size, av;
GstClockTime timestamp;
GstBaseParseFrame _frame = { 0, };
GstBaseParseFrame *frame;
parse = GST_BASE_PARSE (GST_OBJECT_PARENT (pad));
bclass = GST_BASE_PARSE_GET_CLASS (parse);
frame = &_frame;
if (G_LIKELY (buffer)) {
GST_LOG_OBJECT (parse, "buffer size: %d, offset = %" G_GINT64_FORMAT,
GST_BUFFER_SIZE (buffer), GST_BUFFER_OFFSET (buffer));
if (G_UNLIKELY (parse->priv->passthrough)) {
buffer = gst_buffer_make_metadata_writable (buffer);
return gst_base_parse_push_buffer (parse, buffer);
frame->buffer = gst_buffer_make_metadata_writable (buffer);
return gst_base_parse_push_frame (parse, frame);
}
/* upstream feeding us in reverse playback;
* gather each fragment, then process it in single run */
@ -1906,6 +1977,8 @@ gst_base_parse_chain (GstPad * pad, GstBuffer * buffer)
/* Parse and push as many frames as possible */
/* Stop either when adapter is empty or we are flushing */
while (!parse->priv->flushing) {
gboolean res;
tmpbuf = gst_buffer_new ();
old_min_size = 0;
@ -1949,7 +2022,10 @@ gst_base_parse_chain (GstPad * pad, GstBuffer * buffer)
}
skip = -1;
if (bclass->check_valid_frame (parse, tmpbuf, &fsize, &skip)) {
gst_base_parse_frame_update (parse, frame, tmpbuf);
res = bclass->check_valid_frame (parse, frame, &fsize, &skip);
gst_buffer_replace (&frame->buffer, NULL);
if (res) {
if (gst_adapter_available (parse->adapter) < fsize) {
GST_DEBUG_OBJECT (parse,
"found valid frame but not enough data available (only %d bytes)",
@ -2031,7 +2107,8 @@ gst_base_parse_chain (GstPad * pad, GstBuffer * buffer)
parse->priv->prev_ts = parse->priv->next_ts = timestamp;
}
ret = gst_base_parse_handle_and_push_buffer (parse, bclass, outbuf);
frame->buffer = outbuf;
ret = gst_base_parse_handle_and_push_frame (parse, bclass, frame);
GST_PAD_STREAM_UNLOCK (parse->srcpad);
if (ret != GST_FLOW_OK) {
@ -2195,19 +2272,20 @@ exit:
* ajusts sync, drain and offset going along */
static GstFlowReturn
gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass,
GstBuffer ** buf, gboolean full)
GstBaseParseFrame * frame, gboolean full)
{
GstBuffer *buffer, *outbuf;
GstFlowReturn ret = GST_FLOW_OK;
guint fsize = 0, min_size, old_min_size = 0;
gint skip = 0;
g_return_val_if_fail (buf != NULL, GST_FLOW_ERROR);
g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
" (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
while (TRUE) {
gboolean res;
min_size = MAX (parse->priv->min_frame_size, fsize);
/* loop safety check */
@ -2230,7 +2308,10 @@ gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass,
parse->priv->drain = TRUE;
skip = -1;
if (klass->check_valid_frame (parse, buffer, &fsize, &skip)) {
gst_base_parse_frame_update (parse, frame, buffer);
res = klass->check_valid_frame (parse, frame, &fsize, &skip);
gst_buffer_replace (&frame->buffer, NULL);
if (res) {
parse->priv->drain = FALSE;
GST_LOG_OBJECT (parse, "valid frame of size %d at pos %d", fsize, skip);
break;
@ -2289,7 +2370,7 @@ gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass,
parse->priv->offset += fsize;
*buf = outbuf;
frame->buffer = outbuf;
done:
return ret;
@ -2315,8 +2396,8 @@ gst_base_parse_loop (GstPad * pad)
{
GstBaseParse *parse;
GstBaseParseClass *klass;
GstBuffer *outbuf;
GstFlowReturn ret = GST_FLOW_OK;
GstBaseParseFrame frame = { 0, };
parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
klass = GST_BASE_PARSE_GET_CLASS (parse);
@ -2333,12 +2414,12 @@ gst_base_parse_loop (GstPad * pad)
}
}
ret = gst_base_parse_scan_frame (parse, klass, &outbuf, TRUE);
ret = gst_base_parse_scan_frame (parse, klass, &frame, TRUE);
if (ret != GST_FLOW_OK)
goto done;
/* This always unrefs the outbuf, even if error occurs */
ret = gst_base_parse_handle_and_push_buffer (parse, klass, outbuf);
/* This always cleans up frame, even if error occurs */
ret = gst_base_parse_handle_and_push_frame (parse, klass, &frame);
/* eat expected eos signalling past segment in reverse playback */
if (parse->segment.rate < 0.0 && ret == GST_FLOW_UNEXPECTED &&
@ -2708,48 +2789,6 @@ gst_base_parse_set_frame_props (GstBaseParse * parse, guint fps_num,
lead_out, parse->priv->lead_out_ts / GST_MSECOND);
}
/**
* gst_base_parse_get_sync:
* @parse: the #GstBaseParse to query
*
* Returns: TRUE if parser is considered 'in sync'. That is, frames have been
* continuously successfully parsed and pushed.
*/
gboolean
gst_base_parse_get_sync (GstBaseParse * parse)
{
gboolean ret;
g_return_val_if_fail (parse != NULL, FALSE);
/* losing sync is pretty much a discont (and vice versa), no ? */
ret = !parse->priv->discont;
GST_DEBUG_OBJECT (parse, "sync: %d", ret);
return ret;
}
/**
* gst_base_parse_get_drain:
* @parse: the #GstBaseParse to query
*
* Returns: TRUE if parser is currently 'draining'. That is, leftover data
* (e.g. in FLUSH or EOS situation) is being parsed.
*/
gboolean
gst_base_parse_get_drain (GstBaseParse * parse)
{
gboolean ret;
g_return_val_if_fail (parse != NULL, FALSE);
/* losing sync is pretty much a discont (and vice versa), no ? */
ret = parse->priv->drain;
GST_DEBUG_OBJECT (parse, "drain: %d", ret);
return ret;
}
static gboolean
gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
GstClockTime * duration)
@ -2941,6 +2980,7 @@ gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
gboolean orig_drain, orig_discont;
GstFlowReturn ret = GST_FLOW_OK;
GstBuffer *buf = NULL;
GstBaseParseFrame frame = { 0, };
g_return_val_if_fail (GST_FLOW_ERROR, pos != NULL);
g_return_val_if_fail (GST_FLOW_ERROR, time != NULL);
@ -2961,10 +3001,11 @@ gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
/* jump elsewhere and locate next frame */
parse->priv->offset = *pos;
ret = gst_base_parse_scan_frame (parse, klass, &buf, FALSE);
ret = gst_base_parse_scan_frame (parse, klass, &frame, FALSE);
if (ret != GST_FLOW_OK)
goto done;
buf = frame.buffer;
GST_LOG_OBJECT (parse,
"peek parsing frame at offset %" G_GUINT64_FORMAT
" (%#" G_GINT64_MODIFIER "x) of size %d",
@ -2972,12 +3013,13 @@ gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
/* get offset first, subclass parsing might dump other stuff in there */
*pos = GST_BUFFER_OFFSET (buf);
ret = klass->parse_frame (parse, buf);
ret = klass->parse_frame (parse, &frame);
buf = frame.buffer;
/* but it should provide proper time */
*time = GST_BUFFER_TIMESTAMP (buf);
*duration = GST_BUFFER_DURATION (buf);
gst_buffer_unref (buf);
gst_base_parse_frame_clear (parse, &frame);
GST_LOG_OBJECT (parse,
"frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,

99
gst/audioparsers/gstbaseparse.h
View file

@ -90,25 +90,78 @@ G_BEGIN_DECLS
#define GST_BASE_PARSE_FLOW_DROPPED GST_FLOW_CUSTOM_SUCCESS
/**
* GST_BASE_PARSE_FLOW_CLIP:
* GstBaseParseFrameFlags:
* @GST_BASE_PARSE_FRAME_FLAG_NONE: no flag
* @GST_BASE_PARSE_FRAME_FLAG_SYNC: indicates if parsing is 'in sync'
* @GST_BASE_PARSE_FRAME_FLAG_DRAIN: indicates if parser is 'draining'.
* That is, leftover data (e.g. in FLUSH or EOS situation) is being parsed.
* @GST_BASE_PARSE_FRAME_FLAG_NO_FRAME: set to indicate this buffer should not be
* counted as frame, e.g. if this frame is dependent on a previous one.
* As it is not counted as a frame, bitrate increases but frame to time
* conversions are maintained.
* @GST_BASE_PARSE_FRAME_FLAG_CLIP: @pre_push_buffer can set this to indicate
* that regular segment clipping can still be performed (as opposed to
* any custom one having been done).
*
* A #GstFlowReturn that can be returned from pre_push_buffer to
* indicate that regular segment clipping should be performed.
* Flags to be used in a #GstBaseParseFrame.
*
* Since: 0.10.x
*/
#define GST_BASE_PARSE_FLOW_CLIP GST_FLOW_CUSTOM_SUCCESS_1
typedef enum {
GST_BASE_PARSE_FRAME_FLAG_NONE = 0,
GST_BASE_PARSE_FRAME_FLAG_SYNC = (1 << 0),
GST_BASE_PARSE_FRAME_FLAG_DRAIN = (1 << 1),
GST_BASE_PARSE_FRAME_FLAG_NO_FRAME = (1 << 2),
GST_BASE_PARSE_FRAME_FLAG_CLIP = (1 << 3)
} GstBaseParseFrameFlags;
/**
* GST_BASE_PARSE_BUFFER_FLAG_NO_FRAME:
* GstBaseParseFrame:
* @buffer: data to check for valid frame or parsed frame.
* Subclass is allowed to replace this buffer.
* @overhead: subclass can set this to indicates the metadata overhead
* for the given frame, which is then used to enable more accurate bitrate
* computations. If this is -1, it is assumed that this frame should be
* skipped in bitrate calculation.
* @flags: a combination of input and output #GstBaseParseFrameFlags that
* convey additional context to subclass or allow subclass to tune
* subsequent #GstBaseParse actions.
*
* A #GstBufferFlag that can be set to have this buffer not counted as frame,
* e.g. if this frame is dependent on a previous one. As it is not counted as
* a frame, bitrate increases but frame to time conversions are maintained.
* Frame (context) data passed to each frame parsing virtual methods. In
* addition to providing the data to be checked for a valid frame or an already
* identified frame, it conveys additional metadata or control information
* from and to the subclass w.r.t. the particular frame in question (rather
* than global parameters). Some of these may apply to each parsing stage, others
* only to some a particular one. These parameters are effectively zeroed at start
* of each frame's processing, i.e. parsing virtual method invocation sequence.
*
* Since: 0.10.x
*/
#define GST_BASE_PARSE_BUFFER_FLAG_NO_FRAME GST_BUFFER_FLAG_LAST
typedef struct {
GstBuffer *buffer;
guint flags;
gint overhead;
} GstBaseParseFrame;
/**
* GST_BASE_PARSE_FRAME_SYNC:
* @frame: base parse frame instance
*
* Obtains current sync status indicated in frame.
*
* Since: 0.10.x
*/
#define GST_BASE_PARSE_FRAME_SYNC(frame) (!!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_SYNC))
/**
* GST_BASE_PARSE_FRAME_DRAIN:
* @frame: base parse frame instance
*
* Obtains current drain status indicated in frame.
*
* Since: 0.10.x
*/
#define GST_BASE_PARSE_FRAME_DRAIN(frame) (!!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_DRAIN))
/**
@ -118,6 +171,8 @@ G_BEGIN_DECLS
* GST_BASE_PARSE_SEEK_TABLE: Additional metadata provides more accurate seeking.
*
* Indicates what level (of quality) of seeking is possible.
*
* Since: 0.10.x
*/
typedef enum _GstBaseParseSeekable {
GST_BASE_PARSE_SEEK_NONE,
@ -221,12 +276,15 @@ struct _GstBaseParseClass {
GstCaps *caps);
gboolean (*check_valid_frame) (GstBaseParse *parse,
GstBuffer *buffer,
GstBaseParseFrame *frame,
guint *framesize,
gint *skipsize);
GstFlowReturn (*parse_frame) (GstBaseParse *parse,
GstBuffer *buffer);
GstBaseParseFrame *frame);
GstFlowReturn (*pre_push_frame) (GstBaseParse *parse,
GstBaseParseFrame *frame);
gboolean (*convert) (GstBaseParse * parse,
GstFormat src_format,
@ -240,21 +298,16 @@ struct _GstBaseParseClass {
gboolean (*src_event) (GstBaseParse *parse,
GstEvent *event);
gint (*get_frame_overhead) (GstBaseParse *parse,
GstBuffer *buf);
GstFlowReturn (*pre_push_buffer) (GstBaseParse *parse,
GstBuffer *buf);
/*< private >*/
gpointer _gst_reserved[GST_PADDING_LARGE];
};
GType gst_base_parse_get_type (void);
void gst_base_parse_frame_init (GstBaseParse * parse, GstBaseParseFrame * frame);
GstFlowReturn gst_base_parse_push_buffer (GstBaseParse *parse,
GstBuffer *buffer);
GstFlowReturn gst_base_parse_push_frame (GstBaseParse *parse,
GstBaseParseFrame *frame);
void gst_base_parse_set_duration (GstBaseParse *parse,
GstFormat fmt, gint64 duration, gint interval);
@ -262,17 +315,13 @@ void gst_base_parse_set_duration (GstBaseParse *parse,
void gst_base_parse_set_seek (GstBaseParse * parse,
GstBaseParseSeekable seek, guint bitrate);
void gst_base_parse_set_min_frame_size (GstBaseParse *parse,
guint min_size);
void gst_base_parse_set_min_frame_size (GstBaseParse *parse, guint min_size);
void gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough);
void gst_base_parse_set_frame_props (GstBaseParse * parse, guint fps_num,
guint fps_den, guint lead_in, guint lead_out);
gboolean gst_base_parse_get_sync (GstBaseParse * parse);
gboolean gst_base_parse_get_drain (GstBaseParse * parse);
gboolean gst_base_parse_convert_default (GstBaseParse * parse,
GstFormat src_format, gint64 src_value,
GstFormat dest_format, gint64 * dest_value);

20
gst/audioparsers/gstdcaparse.c
View file

@ -70,9 +70,9 @@ static void gst_dca_parse_finalize (GObject * object);
static gboolean gst_dca_parse_start (GstBaseParse * parse);
static gboolean gst_dca_parse_stop (GstBaseParse * parse);
static gboolean gst_dca_parse_check_valid_frame (GstBaseParse * parse,
GstBuffer * buffer, guint * size, gint * skipsize);
GstBaseParseFrame * frame, guint * size, gint * skipsize);
static GstFlowReturn gst_dca_parse_parse_frame (GstBaseParse * parse,
GstBuffer * buf);
GstBaseParseFrame * frame);
GST_BOILERPLATE (GstDcaParse, gst_dca_parse, GstBaseParse, GST_TYPE_BASE_PARSE);
@ -289,11 +289,12 @@ gst_dca_parse_find_sync (GstDcaParse * dcaparse, GstByteReader * reader,
}
static gboolean
gst_dca_parse_check_valid_frame (GstBaseParse * parse, GstBuffer * buf,
guint * framesize, gint * skipsize)
gst_dca_parse_check_valid_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, guint * framesize, gint * skipsize)
{
GstByteReader r = GST_BYTE_READER_INIT_FROM_BUFFER (buf);
GstDcaParse *dcaparse = GST_DCA_PARSE (parse);
GstBuffer *buf = frame->buffer;
GstByteReader r = GST_BYTE_READER_INIT_FROM_BUFFER (buf);
gboolean parser_draining;
gboolean parser_in_sync;
guint32 sync = 0;
@ -303,7 +304,7 @@ gst_dca_parse_check_valid_frame (GstBaseParse * parse, GstBuffer * buf,
if (G_UNLIKELY (GST_BUFFER_SIZE (buf) < 16))
return FALSE;
parser_in_sync = gst_base_parse_get_sync (parse);
parser_in_sync = GST_BASE_PARSE_FRAME_SYNC (frame);
if (G_LIKELY (parser_in_sync && dcaparse->last_sync != 0)) {
off = gst_byte_reader_masked_scan_uint32 (&r, 0xffffffff,
@ -343,7 +344,7 @@ gst_dca_parse_check_valid_frame (GstBaseParse * parse, GstBuffer * buf,
dcaparse->last_sync = sync;
parser_draining = gst_base_parse_get_drain (parse);
parser_draining = GST_BASE_PARSE_FRAME_DRAIN (frame);
if (!parser_in_sync && !parser_draining) {
/* check for second frame to be sure */
@ -377,10 +378,11 @@ gst_dca_parse_check_valid_frame (GstBaseParse * parse, GstBuffer * buf,
}
static GstFlowReturn
gst_dca_parse_parse_frame (GstBaseParse * parse, GstBuffer * buf)
gst_dca_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
{
GstByteReader r = GST_BYTE_READER_INIT_FROM_BUFFER (buf);
GstDcaParse *dcaparse = GST_DCA_PARSE (parse);
GstBuffer *buf = frame->buffer;
GstByteReader r = GST_BYTE_READER_INIT_FROM_BUFFER (buf);
guint size, rate, chans, samples;
if (!gst_dca_parse_parse_header (dcaparse, &r, &size, &rate, &chans,

66
gst/audioparsers/gstflacparse.c
View file

@ -193,13 +193,11 @@ static void gst_flac_parse_get_property (GObject * object, guint prop_id,
static gboolean gst_flac_parse_start (GstBaseParse * parse);
static gboolean gst_flac_parse_stop (GstBaseParse * parse);
static gboolean gst_flac_parse_check_valid_frame (GstBaseParse * parse,
GstBuffer * buffer, guint * framesize, gint * skipsize);
GstBaseParseFrame * frame, guint * framesize, gint * skipsize);
static GstFlowReturn gst_flac_parse_parse_frame (GstBaseParse * parse,
GstBuffer * buffer);
static gint gst_flac_parse_get_frame_overhead (GstBaseParse * parse,
GstBuffer * buffer);
static GstFlowReturn gst_flac_parse_pre_push_buffer (GstBaseParse * parse,
GstBuffer * buf);
GstBaseParseFrame * frame);
static GstFlowReturn gst_flac_parse_pre_push_frame (GstBaseParse * parse,
GstBaseParseFrame * frame);
GST_BOILERPLATE (GstFlacParse, gst_flac_parse, GstBaseParse,
GST_TYPE_BASE_PARSE);
@ -244,10 +242,8 @@ gst_flac_parse_class_init (GstFlacParseClass * klass)
baseparse_class->check_valid_frame =
GST_DEBUG_FUNCPTR (gst_flac_parse_check_valid_frame);
baseparse_class->parse_frame = GST_DEBUG_FUNCPTR (gst_flac_parse_parse_frame);
baseparse_class->get_frame_overhead =
GST_DEBUG_FUNCPTR (gst_flac_parse_get_frame_overhead);
baseparse_class->pre_push_buffer =
GST_DEBUG_FUNCPTR (gst_flac_parse_pre_push_buffer);
baseparse_class->pre_push_frame =
GST_DEBUG_FUNCPTR (gst_flac_parse_pre_push_frame);
}
static void
@ -563,15 +559,17 @@ need_more_data:
}
static gboolean
gst_flac_parse_frame_is_valid (GstFlacParse * flacparse, GstBuffer * buffer,
guint * ret)
gst_flac_parse_frame_is_valid (GstFlacParse * flacparse,
GstBaseParseFrame * frame, guint * ret)
{
GstBuffer *buffer;
const guint8 *data;
guint max, size, remaining;
guint i, search_start, search_end;
FrameHeaderCheckReturn header_ret;
guint16 block_size;
buffer = frame->buffer;
data = GST_BUFFER_DATA (buffer);
size = GST_BUFFER_SIZE (buffer);
@ -621,7 +619,7 @@ gst_flac_parse_frame_is_valid (GstFlacParse * flacparse, GstBuffer * buffer,
}
/* For the last frame output everything to the end */
if (G_UNLIKELY (gst_base_parse_get_drain (GST_BASE_PARSE (flacparse)))) {
if (G_UNLIKELY (GST_BASE_PARSE_FRAME_DRAIN (frame))) {
if (flacparse->check_frame_checksums) {
guint16 actual_crc = gst_flac_calculate_crc16 (data, size - 2);
guint16 expected_crc = GST_READ_UINT16_BE (data + size - 2);
@ -648,9 +646,10 @@ need_more:
static gboolean
gst_flac_parse_check_valid_frame (GstBaseParse * parse,
GstBuffer * buffer, guint * framesize, gint * skipsize)
GstBaseParseFrame * frame, guint * framesize, gint * skipsize)
{
GstFlacParse *flacparse = GST_FLAC_PARSE (parse);
GstBuffer *buffer = frame->buffer;
const guint8 *data = GST_BUFFER_DATA (buffer);
if (G_UNLIKELY (GST_BUFFER_SIZE (buffer) < 4))
@ -689,13 +688,13 @@ gst_flac_parse_check_valid_frame (GstBaseParse * parse,
flacparse->sample_number = 0;
GST_DEBUG_OBJECT (flacparse, "Found sync code");
ret = gst_flac_parse_frame_is_valid (flacparse, buffer, &next);
ret = gst_flac_parse_frame_is_valid (flacparse, frame, &next);
if (ret) {
*framesize = next;
return TRUE;
} else {
/* If we're at EOS and the frame was not valid, drop it! */
if (G_UNLIKELY (gst_base_parse_get_drain (parse))) {
if (G_UNLIKELY (GST_BASE_PARSE_FRAME_DRAIN (frame))) {
GST_WARNING_OBJECT (flacparse, "EOS");
return FALSE;
}
@ -1044,6 +1043,7 @@ push_headers:
while (flacparse->headers) {
GstBuffer *buf = GST_BUFFER (flacparse->headers->data);
GstFlowReturn ret;
GstBaseParseFrame frame;
flacparse->headers =
g_list_delete_link (flacparse->headers, flacparse->headers);
@ -1051,7 +1051,11 @@ push_headers:
gst_buffer_set_caps (buf,
GST_PAD_CAPS (GST_BASE_PARSE_SRC_PAD (GST_BASE_PARSE (flacparse))));
ret = gst_base_parse_push_buffer (GST_BASE_PARSE (flacparse), buf);
/* init, set and give away frame */
gst_base_parse_frame_init (GST_BASE_PARSE (flacparse), &frame);
frame.buffer = buf;
frame.overhead = -1;
ret = gst_base_parse_push_frame (GST_BASE_PARSE (flacparse), &frame);
if (ret != GST_FLOW_OK) {
res = FALSE;
break;
@ -1175,9 +1179,10 @@ gst_flac_parse_generate_headers (GstFlacParse * flacparse)
}
static GstFlowReturn
gst_flac_parse_parse_frame (GstBaseParse * parse, GstBuffer * buffer)
gst_flac_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
{
GstFlacParse *flacparse = GST_FLAC_PARSE (parse);
GstBuffer *buffer = frame->buffer;
const guint8 *data = GST_BUFFER_DATA (buffer);
if (flacparse->state == GST_FLAC_PARSE_STATE_INIT) {
@ -1312,6 +1317,11 @@ gst_flac_parse_parse_frame (GstBaseParse * parse, GstBuffer * buffer)
GST_BUFFER_DURATION (buffer) =
GST_BUFFER_OFFSET (buffer) - GST_BUFFER_TIMESTAMP (buffer);
/* To simplify, we just assume that it's a fixed size header and ignore
* subframe headers. The first could lead us to being off by 88 bits and
* the second even less, so the total inaccuracy is negligible. */
frame->overhead = 7;
/* Minimal size of a frame header */
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (flacparse), MAX (9,
flacparse->min_framesize));
@ -1324,22 +1334,8 @@ gst_flac_parse_parse_frame (GstBaseParse * parse, GstBuffer * buffer)
}
}
static gint
gst_flac_parse_get_frame_overhead (GstBaseParse * parse, GstBuffer * buffer)
{
GstFlacParse *flacparse = GST_FLAC_PARSE (parse);
if (flacparse->state != GST_FLAC_PARSE_STATE_DATA)
return -1;
else
/* To simplify, we just assume that it's a fixed size header and ignore
* subframe headers. The first could lead us to being off by 88 bits and
* the second even less, so the total inaccuracy is negligible. */
return 7;
}
static GstFlowReturn
gst_flac_parse_pre_push_buffer (GstBaseParse * parse, GstBuffer * buf)
gst_flac_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
{
GstFlacParse *flacparse = GST_FLAC_PARSE (parse);
@ -1349,5 +1345,7 @@ gst_flac_parse_pre_push_buffer (GstBaseParse * parse, GstBuffer * buf)
flacparse->tags = NULL;
}
return GST_BASE_PARSE_FLOW_CLIP;
frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
return GST_FLOW_OK;
}

34
gst/audioparsers/gstmpegaudioparse.c
View file

@ -82,11 +82,11 @@ static void gst_mpeg_audio_parse_finalize (GObject * object);
static gboolean gst_mpeg_audio_parse_start (GstBaseParse * parse);
static gboolean gst_mpeg_audio_parse_stop (GstBaseParse * parse);
static gboolean gst_mpeg_audio_parse_check_valid_frame (GstBaseParse * parse,
GstBuffer * buffer, guint * size, gint * skipsize);
GstBaseParseFrame * frame, guint * size, gint * skipsize);
static GstFlowReturn gst_mpeg_audio_parse_parse_frame (GstBaseParse * parse,
GstBuffer * buf);
static GstFlowReturn gst_mpeg_audio_parse_pre_push_buffer (GstBaseParse * parse,
GstBuffer * buf);
GstBaseParseFrame * frame);
static GstFlowReturn gst_mpeg_audio_parse_pre_push_frame (GstBaseParse * parse,
GstBaseParseFrame * frame);
static gboolean gst_mpeg_audio_parse_convert (GstBaseParse * parse,
GstFormat src_format, gint64 src_value,
GstFormat dest_format, gint64 * dest_value);
@ -164,8 +164,8 @@ gst_mpeg_audio_parse_class_init (GstMpegAudioParseClass * klass)
GST_DEBUG_FUNCPTR (gst_mpeg_audio_parse_check_valid_frame);
parse_class->parse_frame =
GST_DEBUG_FUNCPTR (gst_mpeg_audio_parse_parse_frame);
parse_class->pre_push_buffer =
GST_DEBUG_FUNCPTR (gst_mpeg_audio_parse_pre_push_buffer);
parse_class->pre_push_frame =
GST_DEBUG_FUNCPTR (gst_mpeg_audio_parse_pre_push_frame);
parse_class->convert = GST_DEBUG_FUNCPTR (gst_mpeg_audio_parse_convert);
/* register tags */
@ -470,11 +470,12 @@ gst_mpeg_audio_parse_head_check (GstMpegAudioParse * mp3parse,
}
static gboolean
gst_mpeg_audio_parse_check_valid_frame (GstBaseParse * parse, GstBuffer * buf,
guint * framesize, gint * skipsize)
gst_mpeg_audio_parse_check_valid_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, guint * framesize, gint * skipsize)
{
GstByteReader reader = GST_BYTE_READER_INIT_FROM_BUFFER (buf);
GstMpegAudioParse *mp3parse = GST_MPEG_AUDIO_PARSE (parse);
GstBuffer *buf = frame->buffer;
GstByteReader reader = GST_BYTE_READER_INIT_FROM_BUFFER (buf);
gint off, bpf;
gboolean sync, drain, valid, caps_change;
guint32 header;
@ -519,8 +520,8 @@ gst_mpeg_audio_parse_check_valid_frame (GstBaseParse * parse, GstBuffer * buf,
else
caps_change = FALSE;
sync = gst_base_parse_get_sync (parse);
drain = gst_base_parse_get_drain (parse);
sync = GST_BASE_PARSE_FRAME_SYNC (frame);
drain = GST_BASE_PARSE_FRAME_DRAIN (frame);
if (!drain && (!sync || caps_change)) {
if (!gst_mp3parse_validate_extended (mp3parse, buf, header, bpf, drain,
@ -900,9 +901,11 @@ gst_mpeg_audio_parse_handle_first_frame (GstMpegAudioParse * mp3parse,
}
static GstFlowReturn
gst_mpeg_audio_parse_parse_frame (GstBaseParse * parse, GstBuffer * buf)
gst_mpeg_audio_parse_parse_frame (GstBaseParse * parse,
GstBaseParseFrame * frame)
{
GstMpegAudioParse *mp3parse = GST_MPEG_AUDIO_PARSE (parse);
GstBuffer *buf = frame->buffer;
guint bitrate, layer, rate, channels, version, mode, crc;
g_return_val_if_fail (GST_BUFFER_SIZE (buf) >= 4, GST_FLOW_ERROR);
@ -1122,7 +1125,8 @@ gst_mpeg_audio_parse_convert (GstBaseParse * parse, GstFormat src_format,
}
static GstFlowReturn
gst_mpeg_audio_parse_pre_push_buffer (GstBaseParse * parse, GstBuffer * buf)
gst_mpeg_audio_parse_pre_push_frame (GstBaseParse * parse,
GstBaseParseFrame * frame)
{
GstMpegAudioParse *mp3parse = GST_MPEG_AUDIO_PARSE (parse);
GstTagList *taglist;
@ -1188,5 +1192,7 @@ gst_mpeg_audio_parse_pre_push_buffer (GstBaseParse * parse, GstBuffer * buf)
}
/* usual clipping applies */
return GST_BASE_PARSE_FLOW_CLIP;
frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
return GST_FLOW_OK;
}