FaSTTUBe/GST-Tensordecoder-ov_ep
46
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
GST-Tensordecoder-ov_ep/subprojects/gst-plugins-bad/gst/mpegpsmux/mpegpsmux.c

785 lines
25 KiB
C
Raw Blame History

/* MPEG-PS muxer plugin for GStreamer
* Copyright 2008 Lin YANG <oxcsnicho@gmail.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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/*
* Unless otherwise indicated, Source Code is licensed under MIT license.
* See further explanation attached in License Statement (distributed in the file
* LICENSE).
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "mpegpsmux.h"
#include "mpegpsmux_aac.h"
#include "mpegpsmux_h264.h"
GST_DEBUG_CATEGORY (mpegpsmux_debug);
#define GST_CAT_DEFAULT mpegpsmux_debug
enum
{
PROP_AGGREGATE_GOPS = 1
};
#define DEFAULT_AGGREGATE_GOPS FALSE
static GstStaticPadTemplate mpegpsmux_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("video/mpeg, "
"mpegversion = (int) { 1, 2, 4 }, "
"systemstream = (boolean) false; "
"video/x-dirac;"
"video/x-h264,stream-format=(string)byte-stream,"
"alignment=(string){au, nal}; "
"audio/mpeg, "
"mpegversion = (int) { 1, 2 };"
"audio/mpeg, "
"mpegversion = (int) 4, stream-format = (string) { raw, adts }; "
"audio/x-lpcm, "
"width = (int) { 16, 20, 24 }, "
"rate = (int) { 48000, 96000 }, "
"channels = (int) [ 1, 8 ], "
"dynamic_range = (int) [ 0, 255 ], "
"emphasis = (boolean) { FALSE, TRUE }, "
"mute = (boolean) { FALSE, TRUE }"));
static GstStaticPadTemplate mpegpsmux_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpeg, "
"mpegversion = (int) 2, " "systemstream = (boolean) true")
);
static void gst_mpegpsmux_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_mpegpsmux_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void mpegpsmux_finalize (GObject * object);
static gboolean new_packet_cb (guint8 * data, guint len, void *user_data);
static gboolean mpegpsdemux_prepare_srcpad (MpegPsMux * mux);
static GstFlowReturn mpegpsmux_collected (GstCollectPads * pads,
MpegPsMux * mux);
static GstPad *mpegpsmux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
static void mpegpsmux_release_pad (GstElement * element, GstPad * pad);
static GstStateChangeReturn mpegpsmux_change_state (GstElement * element,
GstStateChange transition);
#define parent_class mpegpsmux_parent_class
G_DEFINE_TYPE (MpegPsMux, mpegpsmux, GST_TYPE_ELEMENT);
GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (mpegpsmux, "mpegpsmux", GST_RANK_PRIMARY,
mpegpsmux_get_type (), GST_DEBUG_CATEGORY_INIT (mpegpsmux_debug,
"mpegpsmux", 0, "MPEG Program Stream muxer"));
static void
mpegpsmux_class_init (MpegPsMuxClass * klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->set_property = gst_mpegpsmux_set_property;
gobject_class->get_property = gst_mpegpsmux_get_property;
gobject_class->finalize = mpegpsmux_finalize;
gstelement_class->request_new_pad = mpegpsmux_request_new_pad;
gstelement_class->release_pad = mpegpsmux_release_pad;
gstelement_class->change_state = mpegpsmux_change_state;
g_object_class_install_property (gobject_class, PROP_AGGREGATE_GOPS,
g_param_spec_boolean ("aggregate-gops", "Aggregate GOPs",
"Whether to aggregate GOPs and push them out as buffer lists",
DEFAULT_AGGREGATE_GOPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_add_static_pad_template (gstelement_class,
&mpegpsmux_sink_factory);
gst_element_class_add_static_pad_template (gstelement_class,
&mpegpsmux_src_factory);
gst_element_class_set_static_metadata (gstelement_class,
"MPEG Program Stream Muxer", "Codec/Muxer",
"Multiplexes media streams into an MPEG Program Stream",
"Lin YANG <oxcsnicho@gmail.com>");
}
static void
mpegpsmux_init (MpegPsMux * mux)
{
mux->srcpad = gst_pad_new_from_static_template (&mpegpsmux_src_factory,
"src");
gst_pad_use_fixed_caps (mux->srcpad);
gst_element_add_pad (GST_ELEMENT (mux), mux->srcpad);
mux->collect = gst_collect_pads_new ();
gst_collect_pads_set_function (mux->collect,
(GstCollectPadsFunction) GST_DEBUG_FUNCPTR (mpegpsmux_collected), mux);
mux->psmux = psmux_new ();
psmux_set_write_func (mux->psmux, new_packet_cb, mux);
mux->first = TRUE;
mux->last_flow_ret = GST_FLOW_OK;
mux->last_ts = 0; /* XXX: or -1? */
}
static void
mpegpsmux_finalize (GObject * object)
{
MpegPsMux *mux = GST_MPEG_PSMUX (object);
if (mux->collect) {
gst_object_unref (mux->collect);
mux->collect = NULL;
}
if (mux->psmux) {
psmux_free (mux->psmux);
mux->psmux = NULL;
}
if (mux->gop_list != NULL) {
gst_buffer_list_unref (mux->gop_list);
mux->gop_list = NULL;
}
G_OBJECT_CLASS (mpegpsmux_parent_class)->finalize (object);
}
static void
gst_mpegpsmux_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
MpegPsMux *mux = GST_MPEG_PSMUX (object);
switch (prop_id) {
case PROP_AGGREGATE_GOPS:
mux->aggregate_gops = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mpegpsmux_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
MpegPsMux *mux = GST_MPEG_PSMUX (object);
switch (prop_id) {
case PROP_AGGREGATE_GOPS:
g_value_set_boolean (value, mux->aggregate_gops);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstFlowReturn
mpegpsmux_create_stream (MpegPsMux * mux, MpegPsPadData * ps_data, GstPad * pad)
{
/* Create a steam. Fill in codec specific information */
GstFlowReturn ret = GST_FLOW_ERROR;
GstCaps *caps;
GstStructure *s;
gboolean is_video = FALSE;
caps = gst_pad_get_current_caps (pad);
if (caps == NULL) {
GST_DEBUG_OBJECT (pad, "Sink pad caps were not set before pushing");
return GST_FLOW_NOT_NEGOTIATED;
}
s = gst_caps_get_structure (caps, 0);
if (gst_structure_has_name (s, "video/x-dirac")) {
GST_DEBUG_OBJECT (pad, "Creating Dirac stream");
ps_data->stream = psmux_create_stream (mux->psmux, PSMUX_ST_VIDEO_DIRAC);
is_video = TRUE;
} else if (gst_structure_has_name (s, "audio/x-ac3")) {
GST_DEBUG_OBJECT (pad, "Creating AC3 stream");
ps_data->stream = psmux_create_stream (mux->psmux, PSMUX_ST_PS_AUDIO_AC3);
} else if (gst_structure_has_name (s, "audio/x-dts")) {
GST_DEBUG_OBJECT (pad, "Creating DTS stream");
ps_data->stream = psmux_create_stream (mux->psmux, PSMUX_ST_PS_AUDIO_DTS);
} else if (gst_structure_has_name (s, "audio/x-lpcm")) {
GST_DEBUG_OBJECT (pad, "Creating LPCM stream");
ps_data->stream = psmux_create_stream (mux->psmux, PSMUX_ST_PS_AUDIO_LPCM);
} else if (gst_structure_has_name (s, "video/x-h264")) {
const GValue *value;
GST_DEBUG_OBJECT (pad, "Creating H264 stream");
/* Codec data contains SPS/PPS which need to go in stream for valid ES */
value = gst_structure_get_value (s, "codec_data");
if (value) {
ps_data->codec_data = gst_buffer_ref (gst_value_get_buffer (value));
GST_DEBUG_OBJECT (pad, "%" G_GSIZE_FORMAT " bytes of codec data",
gst_buffer_get_size (ps_data->codec_data));
ps_data->prepare_func = mpegpsmux_prepare_h264;
} else {
ps_data->codec_data = NULL;
}
ps_data->stream = psmux_create_stream (mux->psmux, PSMUX_ST_VIDEO_H264);
is_video = TRUE;
} else if (gst_structure_has_name (s, "audio/mpeg")) {
gint mpegversion;
if (!gst_structure_get_int (s, "mpegversion", &mpegversion)) {
GST_ELEMENT_ERROR (pad, STREAM, FORMAT,
("Invalid data format presented"),
("Caps with type audio/mpeg did not have mpegversion"));
goto beach;
}
switch (mpegversion) {
case 1:
GST_DEBUG_OBJECT (pad, "Creating MPEG Audio, version 1 stream");
ps_data->stream =
psmux_create_stream (mux->psmux, PSMUX_ST_AUDIO_MPEG1);
break;
case 2:
GST_DEBUG_OBJECT (pad, "Creating MPEG Audio, version 2 stream");
ps_data->stream =
psmux_create_stream (mux->psmux, PSMUX_ST_AUDIO_MPEG2);
break;
case 4:
{
const GValue *value;
/* Codec data contains SPS/PPS which need to go in stream for valid ES */
GST_DEBUG_OBJECT (pad, "Creating MPEG Audio, version 4 stream");
value = gst_structure_get_value (s, "codec_data");
if (value) {
ps_data->codec_data = gst_buffer_ref (gst_value_get_buffer (value));
GST_DEBUG_OBJECT (pad, "%" G_GSIZE_FORMAT " bytes of codec data",
gst_buffer_get_size (ps_data->codec_data));
ps_data->prepare_func = mpegpsmux_prepare_aac;
} else {
ps_data->codec_data = NULL;
}
ps_data->stream = psmux_create_stream (mux->psmux, PSMUX_ST_AUDIO_AAC);
break;
}
default:
GST_WARNING_OBJECT (pad, "unsupported mpegversion %d", mpegversion);
goto beach;
}
} else if (gst_structure_has_name (s, "video/mpeg")) {
gint mpegversion;
if (!gst_structure_get_int (s, "mpegversion", &mpegversion)) {
GST_ELEMENT_ERROR (mux, STREAM, FORMAT,
("Invalid data format presented"),
("Caps with type video/mpeg did not have mpegversion"));
goto beach;
}
if (mpegversion == 1) {
GST_DEBUG_OBJECT (pad, "Creating MPEG Video, version 1 stream");
ps_data->stream = psmux_create_stream (mux->psmux, PSMUX_ST_VIDEO_MPEG1);
} else if (mpegversion == 2) {
GST_DEBUG_OBJECT (pad, "Creating MPEG Video, version 2 stream");
ps_data->stream = psmux_create_stream (mux->psmux, PSMUX_ST_VIDEO_MPEG2);
} else {
GST_DEBUG_OBJECT (pad, "Creating MPEG Video, version 4 stream");
ps_data->stream = psmux_create_stream (mux->psmux, PSMUX_ST_VIDEO_MPEG4);
}
is_video = TRUE;
}
if (ps_data->stream != NULL) {
ps_data->stream_id = ps_data->stream->stream_id;
ps_data->stream_id_ext = ps_data->stream->stream_id_ext;
GST_DEBUG_OBJECT (pad, "Stream created, stream_id=%04x, stream_id_ext=%04x",
ps_data->stream_id, ps_data->stream_id_ext);
gst_structure_get_int (s, "rate", &ps_data->stream->audio_sampling);
gst_structure_get_int (s, "channels", &ps_data->stream->audio_channels);
gst_structure_get_int (s, "bitrate", &ps_data->stream->audio_bitrate);
ret = GST_FLOW_OK;
if (is_video && mux->video_stream_id == 0) {
mux->video_stream_id = ps_data->stream_id;
GST_INFO_OBJECT (mux, "video pad stream_id 0x%02x", mux->video_stream_id);
}
}
beach:
gst_caps_unref (caps);
return ret;
}
static GstFlowReturn
mpegpsmux_create_streams (MpegPsMux * mux)
{
/* Create stream for each pad */
GstFlowReturn ret = GST_FLOW_OK;
GSList *walk = mux->collect->data;
/* Create the streams */
while (walk) {
GstCollectData *c_data = (GstCollectData *) walk->data;
MpegPsPadData *ps_data = (MpegPsPadData *) walk->data;
walk = g_slist_next (walk);
if (ps_data->stream == NULL) {
ret = mpegpsmux_create_stream (mux, ps_data, c_data->pad);
if (ret != GST_FLOW_OK)
goto no_stream;
}
}
return GST_FLOW_OK;
no_stream:
GST_ELEMENT_ERROR (mux, STREAM, MUX,
("Could not create handler for stream"), (NULL));
return ret;
}
static GstBuffer *
mpegpsmux_queue_buffer_for_stream (MpegPsMux * mux, MpegPsPadData * ps_data)
{
GstCollectData *c_data = (GstCollectData *) ps_data;
GstBuffer *buf;
g_assert (ps_data->queued.buf == NULL);
buf = gst_collect_pads_peek (mux->collect, c_data);
if (buf == NULL)
return NULL;
ps_data->queued.buf = buf;
/* do any raw -> byte-stream format conversions (e.g. for H.264, AAC) */
if (ps_data->prepare_func) {
buf = ps_data->prepare_func (buf, ps_data, mux);
if (buf) { /* Take the prepared buffer instead */
gst_buffer_unref (ps_data->queued.buf);
ps_data->queued.buf = buf;
} else { /* If data preparation returned NULL, use unprepared one */
buf = ps_data->queued.buf;
}
}
ps_data->queued.pts = GST_BUFFER_PTS (buf);
if (GST_CLOCK_TIME_IS_VALID (ps_data->queued.pts)) {
ps_data->queued.pts = gst_segment_to_running_time (&c_data->segment,
GST_FORMAT_TIME, ps_data->queued.pts);
}
ps_data->queued.dts = GST_BUFFER_DTS (buf);
if (GST_CLOCK_TIME_IS_VALID (ps_data->queued.dts)) {
ps_data->queued.dts = gst_segment_to_running_time (&c_data->segment,
GST_FORMAT_TIME, ps_data->queued.dts);
}
if (GST_BUFFER_PTS_IS_VALID (buf) && GST_BUFFER_DTS_IS_VALID (buf)) {
ps_data->queued.ts = MIN (ps_data->queued.dts, ps_data->queued.pts);
} else if (GST_BUFFER_PTS_IS_VALID (buf) && !GST_BUFFER_DTS_IS_VALID (buf)) {
ps_data->queued.ts = ps_data->queued.pts;
} else if (GST_BUFFER_DTS_IS_VALID (buf) && !GST_BUFFER_PTS_IS_VALID (buf)) {
GST_WARNING_OBJECT (c_data->pad, "got DTS without PTS");
ps_data->queued.ts = ps_data->queued.dts;
} else {
ps_data->queued.ts = GST_CLOCK_TIME_NONE;
}
if (ps_data->queued.ts != GST_CLOCK_TIME_NONE)
ps_data->last_ts = ps_data->queued.ts;
GST_DEBUG_OBJECT (mux, "Queued buffer with ts %" GST_TIME_FORMAT ": "
"uncorrected pts %" GST_TIME_FORMAT " dts %" GST_TIME_FORMAT ", "
"buffer pts %" GST_TIME_FORMAT " dts %" GST_TIME_FORMAT " for PID 0x%04x",
GST_TIME_ARGS (ps_data->queued.ts),
GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
GST_TIME_ARGS (ps_data->queued.pts),
GST_TIME_ARGS (ps_data->queued.dts), ps_data->stream_id);
return buf;
}
static MpegPsPadData *
mpegpsmux_choose_best_stream (MpegPsMux * mux)
{
/* Choose from which stream to mux with */
MpegPsPadData *best = NULL;
GstCollectData *c_best = NULL;
GSList *walk;
for (walk = mux->collect->data; walk != NULL; walk = g_slist_next (walk)) {
GstCollectData *c_data = (GstCollectData *) walk->data;
MpegPsPadData *ps_data = (MpegPsPadData *) walk->data;
if (ps_data->eos == FALSE) {
if (ps_data->queued.buf == NULL) {
GstBuffer *buf;
buf = mpegpsmux_queue_buffer_for_stream (mux, ps_data);
if (buf == NULL) {
GST_DEBUG_OBJECT (mux, "we have EOS");
ps_data->eos = TRUE;
continue;
}
}
/* If we don't yet have a best pad, take this one, otherwise take
* whichever has the oldest timestamp */
if (best != NULL) {
if (ps_data->last_ts == GST_CLOCK_TIME_NONE ||
(best->last_ts != GST_CLOCK_TIME_NONE &&
ps_data->last_ts < best->last_ts)) {
best = ps_data;
c_best = c_data;
}
} else {
best = ps_data;
c_best = c_data;
}
}
}
if (c_best) {
gst_buffer_unref (gst_collect_pads_pop (mux->collect, c_best));
}
return best;
}
static GstFlowReturn
mpegpsmux_push_gop_list (MpegPsMux * mux)
{
GstFlowReturn flow;
g_assert (mux->gop_list != NULL);
GST_DEBUG_OBJECT (mux, "Sending pending GOP of %u buffers",
gst_buffer_list_length (mux->gop_list));
flow = gst_pad_push_list (mux->srcpad, mux->gop_list);
mux->gop_list = NULL;
return flow;
}
static GstFlowReturn
mpegpsmux_collected (GstCollectPads * pads, MpegPsMux * mux)
{
/* main muxing function */
GstFlowReturn ret = GST_FLOW_OK;
MpegPsPadData *best = NULL;
gboolean keyunit;
GST_DEBUG_OBJECT (mux, "Pads collected");
if (mux->first) { /* process block for the first mux */
/* iterate through the collect pads and add streams to @mux */
ret = mpegpsmux_create_streams (mux);
/* Assumption : all pads are already added at this time */
if (G_UNLIKELY (ret != GST_FLOW_OK))
return ret;
best = mpegpsmux_choose_best_stream (mux);
/* prepare the src pad (output), return if failed */
if (!mpegpsdemux_prepare_srcpad (mux)) {
GST_DEBUG_OBJECT (mux, "Failed to send new segment");
goto new_seg_fail;
}
mux->first = FALSE;
} else {
best = mpegpsmux_choose_best_stream (mux);
}
if (best != NULL) {
GstBuffer *buf = best->queued.buf;
gint64 pts, dts;
g_assert (buf != NULL);
GST_LOG_OBJECT (mux,
"Chose stream from pad %" GST_PTR_FORMAT " for output (PID: 0x%04x): "
"adjusted pts: %" GST_TIME_FORMAT ", dts: %" GST_TIME_FORMAT,
best->collect.pad, best->stream_id,
GST_TIME_ARGS (best->queued.pts), GST_TIME_ARGS (best->queued.dts));
/* and convert to mpeg time stamps */
pts = GSTTIME_TO_MPEGTIME (best->queued.pts);
dts = GSTTIME_TO_MPEGTIME (best->queued.dts);
/* start of new GOP? */
keyunit = !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
if (keyunit && best->stream_id == mux->video_stream_id
&& mux->gop_list != NULL) {
ret = mpegpsmux_push_gop_list (mux);
if (ret != GST_FLOW_OK)
goto done;
}
/* give the buffer to libpsmux for processing */
psmux_stream_add_data (best->stream, buf, pts, dts, keyunit);
best->queued.buf = NULL;
/* write the data from libpsmux to stream */
while (psmux_stream_bytes_in_buffer (best->stream) > 0) {
GST_LOG_OBJECT (mux, "Before @psmux_write_stream_packet");
if (!psmux_write_stream_packet (mux->psmux, best->stream)) {
GST_DEBUG_OBJECT (mux, "Failed to write data packet");
goto write_fail;
}
}
mux->last_ts = best->last_ts;
} else {
/* FIXME: Drain all remaining streams */
/* At EOS */
if (mux->gop_list != NULL)
mpegpsmux_push_gop_list (mux);
if (!psmux_write_end_code (mux->psmux)) {
GST_WARNING_OBJECT (mux, "Writing MPEG PS Program end code failed.");
}
gst_pad_push_event (mux->srcpad, gst_event_new_eos ());
ret = GST_FLOW_EOS;
}
done:
return ret;
new_seg_fail:
return GST_FLOW_ERROR;
write_fail:
/* FIXME: Failed writing data for some reason. Should set appropriate error */
return mux->last_flow_ret;
}
static GstPad *
mpegpsmux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps)
{
MpegPsMux *mux = GST_MPEG_PSMUX (element);
GstPad *pad = NULL;
MpegPsPadData *pad_data = NULL;
pad = gst_pad_new_from_template (templ, name);
pad_data = (MpegPsPadData *) gst_collect_pads_add_pad (mux->collect, pad,
sizeof (MpegPsPadData), NULL, TRUE);
if (pad_data == NULL)
goto pad_failure;
pad_data->last_ts = GST_CLOCK_TIME_NONE;
pad_data->codec_data = NULL;
pad_data->prepare_func = NULL;
if (G_UNLIKELY (!gst_element_add_pad (element, pad)))
goto could_not_add;
return pad;
could_not_add:
GST_ELEMENT_ERROR (element, STREAM, FAILED,
("Internal data stream error."), ("Could not add pad to element"));
gst_collect_pads_remove_pad (mux->collect, pad);
gst_object_unref (pad);
return NULL;
pad_failure:
GST_ELEMENT_ERROR (element, STREAM, FAILED,
("Internal data stream error."), ("Could not add pad to collectpads"));
gst_object_unref (pad);
return NULL;
}
static void
mpegpsmux_release_pad (GstElement * element, GstPad * pad)
{
/* unref pad data (and codec data) */
MpegPsMux *mux = GST_MPEG_PSMUX (element);
MpegPsPadData *pad_data = NULL;
GST_DEBUG_OBJECT (mux, "Pad %" GST_PTR_FORMAT " being released", pad);
/* Get the MpegPsPadData out of the pad */
GST_OBJECT_LOCK (pad);
pad_data = (MpegPsPadData *) gst_pad_get_element_private (pad);
if (G_LIKELY (pad_data)) {
/* Free codec data reference if any */
if (pad_data->codec_data) {
GST_DEBUG_OBJECT (element, "releasing codec_data reference");
gst_buffer_unref (pad_data->codec_data);
pad_data->codec_data = NULL;
}
if (pad_data->stream_id == mux->video_stream_id)
mux->video_stream_id = 0;
}
GST_OBJECT_UNLOCK (pad);
gst_collect_pads_remove_pad (mux->collect, pad);
}
static gboolean
new_packet_cb (guint8 * data, guint len, void *user_data)
{
/* Called when the PsMux has prepared a packet for output. Return FALSE
* on error */
MpegPsMux *mux = (MpegPsMux *) user_data;
GstBuffer *buf;
GstFlowReturn ret;
GST_LOG_OBJECT (mux, "Outputting a packet of length %d", len);
data = g_memdup2 (data, len);
buf = gst_buffer_new_wrapped (data, len);
GST_BUFFER_TIMESTAMP (buf) = mux->last_ts;
if (mux->aggregate_gops) {
if (mux->gop_list == NULL)
mux->gop_list = gst_buffer_list_new ();
gst_buffer_list_add (mux->gop_list, buf);
return TRUE;
}
ret = gst_pad_push (mux->srcpad, buf);
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
mux->last_flow_ret = ret;
return FALSE;
}
return TRUE;
}
/* prepare the source pad for output */
static gboolean
mpegpsdemux_prepare_srcpad (MpegPsMux * mux)
{
GstSegment segment;
GValue val = { 0, };
GList *headers, *l;
GstCaps *caps;
gchar s_id[32];
/* stream-start (FIXME: create id based on input ids) */
g_snprintf (s_id, sizeof (s_id), "mpegpsmux-%08x", g_random_int ());
gst_pad_push_event (mux->srcpad, gst_event_new_stream_start (s_id));
caps = gst_caps_new_simple ("video/mpeg",
"mpegversion", G_TYPE_INT, 2, "systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
headers = psmux_get_stream_headers (mux->psmux);
g_value_init (&val, GST_TYPE_ARRAY);
for (l = headers; l != NULL; l = l->next) {
GValue buf_val = { 0, };
g_value_init (&buf_val, GST_TYPE_BUFFER);
gst_value_take_buffer (&buf_val, GST_BUFFER (l->data));
l->data = NULL;
gst_value_array_append_value (&val, &buf_val);
g_value_unset (&buf_val);
}
gst_caps_set_value (caps, "streamheader", &val);
g_value_unset (&val);
g_list_free (headers);
/* Set caps on src pad and push new segment */
gst_pad_push_event (mux->srcpad, gst_event_new_caps (caps));
gst_caps_unref (caps);
gst_segment_init (&segment, GST_FORMAT_BYTES);
gst_pad_push_event (mux->srcpad, gst_event_new_segment (&segment));
return TRUE;
}
static GstStateChangeReturn
mpegpsmux_change_state (GstElement * element, GstStateChange transition)
{
/* control the collect pads */
MpegPsMux *mux = GST_MPEG_PSMUX (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_collect_pads_start (mux->collect);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_collect_pads_stop (mux->collect);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
default:
break;
}
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return GST_ELEMENT_REGISTER (mpegpsmux, plugin);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR,
mpegpsmux, "MPEG-PS muxer",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
Reference in New Issue View Git Blame Copy Permalink