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gstreamer/subprojects/gst-libav/ext/libav/gstavmux.c
Akkariin Meiko 27c4ec74a1 Update
2022-03-12 03:16:09 +08:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <libavformat/avformat.h>
#include <libavutil/opt.h>
#include <gst/gst.h>
#include <gst/base/gstcollectpads.h>
#include "gstav.h"
#include "gstavcodecmap.h"
#include "gstavutils.h"
#include "gstavprotocol.h"
typedef struct _GstFFMpegMux GstFFMpegMux;
typedef struct _GstFFMpegMuxPad GstFFMpegMuxPad;
struct _GstFFMpegMuxPad
{
GstCollectData collect; /* we extend the CollectData */
gint padnum;
};
struct _GstFFMpegMux
{
GstElement element;
GstCollectPads *collect;
/* We need to keep track of our pads, so we do so here. */
GstPad *srcpad;
AVFormatContext *context;
gboolean opened;
guint videopads, audiopads;
/*< private > */
/* event_function is the collectpads default eventfunction */
GstPadEventFunction event_function;
int max_delay;
int preload;
};
typedef struct _GstFFMpegMuxClass GstFFMpegMuxClass;
struct _GstFFMpegMuxClass
{
GstElementClass parent_class;
AVOutputFormat *in_plugin;
};
#define GST_TYPE_FFMPEGMUX \
(gst_ffmpegdec_get_type())
#define GST_FFMPEGMUX(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_FFMPEGMUX,GstFFMpegMux))
#define GST_FFMPEGMUX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_FFMPEGMUX,GstFFMpegMuxClass))
#define GST_IS_FFMPEGMUX(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_FFMPEGMUX))
#define GST_IS_FFMPEGMUX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_FFMPEGMUX))
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_PRELOAD,
PROP_MAXDELAY
};
/* A number of function prototypes are given so we can refer to them later. */
static void gst_ffmpegmux_class_init (GstFFMpegMuxClass * klass);
static void gst_ffmpegmux_base_init (gpointer g_class);
static void gst_ffmpegmux_init (GstFFMpegMux * ffmpegmux,
GstFFMpegMuxClass * g_class);
static void gst_ffmpegmux_finalize (GObject * object);
static gboolean gst_ffmpegmux_setcaps (GstPad * pad, GstCaps * caps);
static GstPad *gst_ffmpegmux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
static GstFlowReturn gst_ffmpegmux_collected (GstCollectPads * pads,
gpointer user_data);
static gboolean gst_ffmpegmux_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static GstStateChangeReturn gst_ffmpegmux_change_state (GstElement * element,
GstStateChange transition);
static void gst_ffmpegmux_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_ffmpegmux_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstCaps *gst_ffmpegmux_get_id_caps (enum AVCodecID *id_list);
static void gst_ffmpeg_mux_simple_caps_set_int_list (GstCaps * caps,
const gchar * field, guint num, const gint * values);
#define GST_FFMUX_PARAMS_QDATA g_quark_from_static_string("avmux-params")
static GstElementClass *parent_class = NULL;
/*static guint gst_ffmpegmux_signals[LAST_SIGNAL] = { 0 }; */
typedef struct
{
const char *name;
const char *replacement;
} GstFFMpegMuxReplacement;
static const char *
gst_ffmpegmux_get_replacement (const char *name)
{
static const GstFFMpegMuxReplacement blacklist[] = {
{"avi", "avimux"},
{"matroska", "matroskamux"},
{"mov", "qtmux"},
{"mpegts", "mpegtsmux"},
{"mp4", "mp4mux"},
{"mpjpeg", "multipartmux"},
{"ogg", "oggmux"},
{"wav", "wavenc"},
{"webm", "webmmux"},
{"mxf", "mxfmux"},
{"3gp", "gppmux"},
{"yuv4mpegpipe", "y4menc"},
{"aiff", "aiffmux"},
{"adts", "aacparse"},
{"asf", "asfmux"},
{"asf_stream", "asfmux"},
{"flv", "flvmux"},
{"mp3", "id3v2mux"},
{"mp2", "id3v2mux"}
};
guint i;
for (i = 0; i < sizeof (blacklist) / sizeof (blacklist[0]); i++) {
if (strcmp (blacklist[i].name, name) == 0) {
return blacklist[i].replacement;
}
}
return NULL;
}
static gboolean
gst_ffmpegmux_is_formatter (const char *name)
{
static const char *replace[] = {
"mp2", "mp3", NULL
};
int i;
for (i = 0; replace[i]; i++)
if (strcmp (replace[i], name) == 0)
return TRUE;
return FALSE;
}
static void
gst_ffmpegmux_base_init (gpointer g_class)
{
GstFFMpegMuxClass *klass = (GstFFMpegMuxClass *) g_class;
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
GstPadTemplate *videosinktempl, *audiosinktempl, *srctempl;
AVOutputFormat *in_plugin;
GstCaps *srccaps, *audiosinkcaps, *videosinkcaps;
enum AVCodecID *video_ids = NULL, *audio_ids = NULL;
gchar *longname, *description, *name;
const char *replacement;
gboolean is_formatter;
in_plugin =
(AVOutputFormat *) g_type_get_qdata (G_OBJECT_CLASS_TYPE (klass),
GST_FFMUX_PARAMS_QDATA);
g_assert (in_plugin != NULL);
name = g_strdup (in_plugin->name);
g_strdelimit (name, ".,|-<> ", '_');
/* construct the element details struct */
replacement = gst_ffmpegmux_get_replacement (in_plugin->name);
is_formatter = gst_ffmpegmux_is_formatter (in_plugin->name);
if (replacement != NULL) {
longname =
g_strdup_printf ("libav %s %s (not recommended, use %s instead)",
in_plugin->long_name, is_formatter ? "formatter" : "muxer",
replacement);
description =
g_strdup_printf ("libav %s %s (not recommended, use %s instead)",
in_plugin->long_name, is_formatter ? "formatter" : "muxer",
replacement);
} else {
longname = g_strdup_printf ("libav %s %s", in_plugin->long_name,
is_formatter ? "formatter" : "muxer");
description = g_strdup_printf ("libav %s %s", in_plugin->long_name,
is_formatter ? "formatter" : "muxer");
}
gst_element_class_set_metadata (element_class, longname,
is_formatter ? "Formatter/Metadata" : "Codec/Muxer", description,
"Wim Taymans <wim.taymans@chello.be>, "
"Ronald Bultje <rbultje@ronald.bitfreak.net>");
g_free (longname);
g_free (description);
/* Try to find the caps that belongs here */
srccaps = gst_ffmpeg_formatid_to_caps (name);
if (!srccaps) {
GST_DEBUG ("Couldn't get source caps for muxer '%s', skipping", name);
goto beach;
}
if (!gst_ffmpeg_formatid_get_codecids (in_plugin->name,
&video_ids, &audio_ids, in_plugin)) {
gst_caps_unref (srccaps);
GST_DEBUG ("Couldn't get sink caps for muxer '%s'. Most likely because "
"no input format mapping exists.", name);
goto beach;
}
videosinkcaps = video_ids ? gst_ffmpegmux_get_id_caps (video_ids) : NULL;
audiosinkcaps = audio_ids ? gst_ffmpegmux_get_id_caps (audio_ids) : NULL;
/* fix up allowed caps for some muxers */
/* FIXME : This should be in gstffmpegcodecmap.c ! */
if (strcmp (in_plugin->name, "flv") == 0) {
const gint rates[] = { 44100, 22050, 11025 };
gst_ffmpeg_mux_simple_caps_set_int_list (audiosinkcaps, "rate", 3, rates);
} else if (strcmp (in_plugin->name, "dv") == 0) {
gst_caps_set_simple (audiosinkcaps,
"rate", G_TYPE_INT, 48000, "channels", G_TYPE_INT, 2, NULL);
}
/* pad templates */
srctempl = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, srccaps);
gst_element_class_add_pad_template (element_class, srctempl);
gst_caps_unref (srccaps);
if (audiosinkcaps) {
audiosinktempl = gst_pad_template_new ("audio_%u",
GST_PAD_SINK, GST_PAD_REQUEST, audiosinkcaps);
gst_element_class_add_pad_template (element_class, audiosinktempl);
gst_caps_unref (audiosinkcaps);
}
if (videosinkcaps) {
videosinktempl = gst_pad_template_new ("video_%u",
GST_PAD_SINK, GST_PAD_REQUEST, videosinkcaps);
gst_element_class_add_pad_template (element_class, videosinktempl);
gst_caps_unref (videosinkcaps);
}
beach:
klass->in_plugin = in_plugin;
g_free (name);
}
static void
gst_ffmpegmux_class_init (GstFFMpegMuxClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_ffmpegmux_set_property);
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_ffmpegmux_get_property);
g_object_class_install_property (gobject_class, PROP_PRELOAD,
g_param_spec_int ("preload", "preload",
"Set the initial demux-decode delay (in microseconds)",
0, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MAXDELAY,
g_param_spec_int ("maxdelay", "maxdelay",
"Set the maximum demux-decode delay (in microseconds)", 0, G_MAXINT,
0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstelement_class->request_new_pad = gst_ffmpegmux_request_new_pad;
gstelement_class->change_state = gst_ffmpegmux_change_state;
gobject_class->finalize = gst_ffmpegmux_finalize;
}
static void
gst_ffmpegmux_init (GstFFMpegMux * ffmpegmux, GstFFMpegMuxClass * g_class)
{
GstElementClass *klass = GST_ELEMENT_CLASS (g_class);
GstFFMpegMuxClass *oclass = (GstFFMpegMuxClass *) klass;
GstPadTemplate *templ = gst_element_class_get_pad_template (klass, "src");
ffmpegmux->srcpad = gst_pad_new_from_template (templ, "src");
gst_pad_set_caps (ffmpegmux->srcpad, gst_pad_template_get_caps (templ));
gst_element_add_pad (GST_ELEMENT (ffmpegmux), ffmpegmux->srcpad);
ffmpegmux->collect = gst_collect_pads_new ();
gst_collect_pads_set_function (ffmpegmux->collect,
(GstCollectPadsFunction) gst_ffmpegmux_collected, ffmpegmux);
ffmpegmux->context = avformat_alloc_context ();
ffmpegmux->context->oformat = oclass->in_plugin;
ffmpegmux->context->nb_streams = 0;
ffmpegmux->opened = FALSE;
ffmpegmux->videopads = 0;
ffmpegmux->audiopads = 0;
ffmpegmux->max_delay = 0;
}
static void
gst_ffmpegmux_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstFFMpegMux *src;
src = (GstFFMpegMux *) object;
switch (prop_id) {
case PROP_PRELOAD:
src->preload = g_value_get_int (value);
break;
case PROP_MAXDELAY:
src->max_delay = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_ffmpegmux_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstFFMpegMux *src;
src = (GstFFMpegMux *) object;
switch (prop_id) {
case PROP_PRELOAD:
g_value_set_int (value, src->preload);
break;
case PROP_MAXDELAY:
g_value_set_int (value, src->max_delay);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_ffmpegmux_finalize (GObject * object)
{
GstFFMpegMux *ffmpegmux = (GstFFMpegMux *) object;
avformat_free_context (ffmpegmux->context);
ffmpegmux->context = NULL;
gst_object_unref (ffmpegmux->collect);
if (G_OBJECT_CLASS (parent_class)->finalize)
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstPad *
gst_ffmpegmux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps)
{
GstFFMpegMux *ffmpegmux = (GstFFMpegMux *) element;
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
GstFFMpegMuxPad *collect_pad;
gchar *padname;
GstPad *pad;
AVStream *st;
enum AVMediaType type;
gint bitrate = 0, framesize = 0;
g_return_val_if_fail (templ != NULL, NULL);
g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
g_return_val_if_fail (ffmpegmux->opened == FALSE, NULL);
/* figure out a name that *we* like */
if (templ == gst_element_class_get_pad_template (klass, "video_%u")) {
padname = g_strdup_printf ("video_%u", ffmpegmux->videopads++);
type = AVMEDIA_TYPE_VIDEO;
bitrate = 64 * 1024;
framesize = 1152;
} else if (templ == gst_element_class_get_pad_template (klass, "audio_%u")) {
padname = g_strdup_printf ("audio_%u", ffmpegmux->audiopads++);
type = AVMEDIA_TYPE_AUDIO;
bitrate = 285 * 1024;
} else {
g_warning ("avmux: unknown pad template!");
return NULL;
}
/* create pad */
pad = gst_pad_new_from_template (templ, padname);
collect_pad = (GstFFMpegMuxPad *)
gst_collect_pads_add_pad (ffmpegmux->collect, pad,
sizeof (GstFFMpegMuxPad), NULL, TRUE);
collect_pad->padnum = ffmpegmux->context->nb_streams;
/* small hack to put our own event pad function and chain up to collect pad */
ffmpegmux->event_function = GST_PAD_EVENTFUNC (pad);
gst_pad_set_event_function (pad,
GST_DEBUG_FUNCPTR (gst_ffmpegmux_sink_event));
gst_element_add_pad (element, pad);
/* AVStream needs to be created */
st = avformat_new_stream (ffmpegmux->context, NULL);
st->id = collect_pad->padnum;
st->codecpar->codec_type = type;
st->codecpar->codec_id = AV_CODEC_ID_NONE; /* this is a check afterwards */
st->codecpar->bit_rate = bitrate;
st->codecpar->frame_size = framesize;
/* we fill in codec during capsnego */
/* we love debug output (c) (tm) (r) */
GST_DEBUG ("Created %s pad for avmux_%s element",
padname, ((GstFFMpegMuxClass *) klass)->in_plugin->name);
g_free (padname);
return pad;
}
/**
* gst_ffmpegmux_setcaps
* @pad: #GstPad
* @caps: New caps.
*
* Set caps to pad.
*
* Returns: #TRUE on success.
*/
static gboolean
gst_ffmpegmux_setcaps (GstPad * pad, GstCaps * caps)
{
GstFFMpegMux *ffmpegmux = (GstFFMpegMux *) (gst_pad_get_parent (pad));
GstFFMpegMuxPad *collect_pad;
AVStream *st;
AVCodecContext tmp;
collect_pad = (GstFFMpegMuxPad *) gst_pad_get_element_private (pad);
st = ffmpegmux->context->streams[collect_pad->padnum];
av_opt_set_int (ffmpegmux->context, "preload", ffmpegmux->preload, 0);
ffmpegmux->context->max_delay = ffmpegmux->max_delay;
memset (&tmp, 0, sizeof (tmp));
/* for the format-specific guesses, we'll go to
* our famous codec mapper */
if (gst_ffmpeg_caps_to_codecid (caps, &tmp) == AV_CODEC_ID_NONE)
goto not_accepted;
avcodec_parameters_from_context (st->codecpar, &tmp);
/* copy over the aspect ratios, ffmpeg expects the stream aspect to match the
* codec aspect. */
st->sample_aspect_ratio = st->codecpar->sample_aspect_ratio;
GST_LOG_OBJECT (pad, "accepted caps %" GST_PTR_FORMAT, caps);
return TRUE;
/* ERRORS */
not_accepted:
{
GST_LOG_OBJECT (pad, "rejecting caps %" GST_PTR_FORMAT, caps);
return FALSE;
}
}
static gboolean
gst_ffmpegmux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstFFMpegMux *ffmpegmux = (GstFFMpegMux *) parent;
gboolean res = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_TAG:{
GstTagList *taglist;
GstTagSetter *setter = GST_TAG_SETTER (ffmpegmux);
const GstTagMergeMode mode = gst_tag_setter_get_tag_merge_mode (setter);
gst_event_parse_tag (event, &taglist);
gst_tag_setter_merge_tags (setter, taglist, mode);
break;
}
case GST_EVENT_CAPS:{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
if (!(res = gst_ffmpegmux_setcaps (pad, caps)))
goto beach;
break;
}
default:
break;
}
/* chaining up to collectpads default event function */
res = ffmpegmux->event_function (pad, parent, event);
beach:
return res;
}
static GstFlowReturn
gst_ffmpegmux_collected (GstCollectPads * pads, gpointer user_data)
{
GstFFMpegMux *ffmpegmux = (GstFFMpegMux *) user_data;
GSList *collected;
GstFFMpegMuxPad *best_pad;
GstClockTime best_time;
#if 0
/* Re-enable once converted to new AVMetaData API
* See #566605
*/
const GstTagList *tags;
#endif
/* open "file" (gstreamer protocol to next element) */
if (!ffmpegmux->opened) {
int open_flags = AVIO_FLAG_WRITE;
/* we do need all streams to have started capsnego,
* or things will go horribly wrong */
for (collected = ffmpegmux->collect->data; collected;
collected = g_slist_next (collected)) {
GstFFMpegMuxPad *collect_pad = (GstFFMpegMuxPad *) collected->data;
AVStream *st = ffmpegmux->context->streams[collect_pad->padnum];
/* check whether the pad has successfully completed capsnego */
if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
GST_ELEMENT_ERROR (ffmpegmux, CORE, NEGOTIATION, (NULL),
("no caps set on stream %d (%s)", collect_pad->padnum,
(st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) ?
"video" : "audio"));
return GST_FLOW_ERROR;
}
/* set framerate for audio */
if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
switch (st->codecpar->codec_id) {
case AV_CODEC_ID_PCM_S16LE:
case AV_CODEC_ID_PCM_S16BE:
case AV_CODEC_ID_PCM_U16LE:
case AV_CODEC_ID_PCM_U16BE:
case AV_CODEC_ID_PCM_S8:
case AV_CODEC_ID_PCM_U8:
st->codecpar->frame_size = 1;
break;
default:
{
GstBuffer *buffer;
/* FIXME : This doesn't work for RAW AUDIO...
* in fact I'm wondering if it even works for any kind of audio... */
buffer = gst_collect_pads_peek (ffmpegmux->collect,
(GstCollectData *) collect_pad);
if (buffer) {
st->codecpar->frame_size =
st->codecpar->sample_rate *
GST_BUFFER_DURATION (buffer) / GST_SECOND;
gst_buffer_unref (buffer);
}
}
}
}
}
#if 0
/* Re-enable once converted to new AVMetaData API
* See #566605
*/
/* tags */
tags = gst_tag_setter_get_tag_list (GST_TAG_SETTER (ffmpegmux));
if (tags) {
gint i;
gchar *s;
/* get the interesting ones */
if (gst_tag_list_get_string (tags, GST_TAG_TITLE, &s)) {
strncpy (ffmpegmux->context->title, s,
sizeof (ffmpegmux->context->title));
}
if (gst_tag_list_get_string (tags, GST_TAG_ARTIST, &s)) {
strncpy (ffmpegmux->context->author, s,
sizeof (ffmpegmux->context->author));
}
if (gst_tag_list_get_string (tags, GST_TAG_COPYRIGHT, &s)) {
strncpy (ffmpegmux->context->copyright, s,
sizeof (ffmpegmux->context->copyright));
}
if (gst_tag_list_get_string (tags, GST_TAG_COMMENT, &s)) {
strncpy (ffmpegmux->context->comment, s,
sizeof (ffmpegmux->context->comment));
}
if (gst_tag_list_get_string (tags, GST_TAG_ALBUM, &s)) {
strncpy (ffmpegmux->context->album, s,
sizeof (ffmpegmux->context->album));
}
if (gst_tag_list_get_string (tags, GST_TAG_GENRE, &s)) {
strncpy (ffmpegmux->context->genre, s,
sizeof (ffmpegmux->context->genre));
}
if (gst_tag_list_get_int (tags, GST_TAG_TRACK_NUMBER, &i)) {
ffmpegmux->context->track = i;
}
}
#endif
/* set the streamheader flag for gstffmpegprotocol if codec supports it */
if (!strcmp (ffmpegmux->context->oformat->name, "flv")) {
open_flags |= GST_FFMPEG_URL_STREAMHEADER;
}
/* some house-keeping for downstream before starting data flow */
/* stream-start (FIXME: create id based on input ids) */
{
gchar s_id[32];
g_snprintf (s_id, sizeof (s_id), "avmux-%08x", g_random_int ());
gst_pad_push_event (ffmpegmux->srcpad, gst_event_new_stream_start (s_id));
}
/* segment */
{
GstSegment segment;
/* let downstream know we think in BYTES and expect to do seeking later on */
gst_segment_init (&segment, GST_FORMAT_BYTES);
gst_pad_push_event (ffmpegmux->srcpad, gst_event_new_segment (&segment));
}
if (gst_ffmpegdata_open (ffmpegmux->srcpad, open_flags,
&ffmpegmux->context->pb) < 0) {
GST_ELEMENT_ERROR (ffmpegmux, LIBRARY, TOO_LAZY, (NULL),
("Failed to open stream context in avmux"));
return GST_FLOW_ERROR;
}
/* now open the mux format */
if (avformat_write_header (ffmpegmux->context, NULL) < 0) {
GST_ELEMENT_ERROR (ffmpegmux, LIBRARY, SETTINGS, (NULL),
("Failed to write file header - check codec settings"));
return GST_FLOW_ERROR;
}
/* we're now opened */
ffmpegmux->opened = TRUE;
/* flush the header so it will be used as streamheader */
avio_flush (ffmpegmux->context->pb);
}
/* take the one with earliest timestamp,
* and push it forward */
best_pad = NULL;
best_time = GST_CLOCK_TIME_NONE;
for (collected = ffmpegmux->collect->data; collected;
collected = g_slist_next (collected)) {
GstFFMpegMuxPad *collect_pad = (GstFFMpegMuxPad *) collected->data;
GstBuffer *buffer = gst_collect_pads_peek (ffmpegmux->collect,
(GstCollectData *) collect_pad);
/* if there's no buffer, just continue */
if (buffer == NULL) {
continue;
}
/* if we have no buffer yet, just use the first one */
if (best_pad == NULL) {
best_pad = collect_pad;
best_time = GST_BUFFER_TIMESTAMP (buffer);
goto next_pad;
}
/* if we do have one, only use this one if it's older */
if (GST_BUFFER_TIMESTAMP (buffer) < best_time) {
best_time = GST_BUFFER_TIMESTAMP (buffer);
best_pad = collect_pad;
}
next_pad:
gst_buffer_unref (buffer);
/* Mux buffers with invalid timestamp first */
if (!GST_CLOCK_TIME_IS_VALID (best_time))
break;
}
/* now handle the buffer, or signal EOS if we have
* no buffers left */
if (best_pad != NULL) {
GstBuffer *buf;
AVPacket pkt = { 0, };
GstMapInfo map;
/* push out current buffer */
buf =
gst_collect_pads_pop (ffmpegmux->collect, (GstCollectData *) best_pad);
/* set time */
pkt.pts = gst_ffmpeg_time_gst_to_ff (GST_BUFFER_TIMESTAMP (buf),
ffmpegmux->context->streams[best_pad->padnum]->time_base);
pkt.dts = pkt.pts;
gst_buffer_map (buf, &map, GST_MAP_READ);
pkt.data = map.data;
pkt.size = map.size;
pkt.stream_index = best_pad->padnum;
if (!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT))
pkt.flags |= AV_PKT_FLAG_KEY;
if (GST_BUFFER_DURATION_IS_VALID (buf))
pkt.duration =
gst_ffmpeg_time_gst_to_ff (GST_BUFFER_DURATION (buf),
ffmpegmux->context->streams[best_pad->padnum]->time_base);
av_write_frame (ffmpegmux->context, &pkt);
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
} else {
/* close down */
av_write_trailer (ffmpegmux->context);
ffmpegmux->opened = FALSE;
avio_flush (ffmpegmux->context->pb);
gst_ffmpegdata_close (ffmpegmux->context->pb);
gst_pad_push_event (ffmpegmux->srcpad, gst_event_new_eos ());
return GST_FLOW_EOS;
}
return GST_FLOW_OK;
}
static GstStateChangeReturn
gst_ffmpegmux_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstFFMpegMux *ffmpegmux = (GstFFMpegMux *) (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_collect_pads_start (ffmpegmux->collect);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_collect_pads_stop (ffmpegmux->collect);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_tag_setter_reset_tags (GST_TAG_SETTER (ffmpegmux));
if (ffmpegmux->opened) {
ffmpegmux->opened = FALSE;
gst_ffmpegdata_close (ffmpegmux->context->pb);
}
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static GstCaps *
gst_ffmpegmux_get_id_caps (enum AVCodecID *id_list)
{
GstCaps *caps, *t;
gint i;
caps = gst_caps_new_empty ();
for (i = 0; id_list[i] != AV_CODEC_ID_NONE; i++) {
if ((t = gst_ffmpeg_codecid_to_caps (id_list[i], NULL, TRUE)))
gst_caps_append (caps, t);
}
if (gst_caps_is_empty (caps)) {
gst_caps_unref (caps);
return NULL;
}
return caps;
}
/* set a list of integer values on the caps, e.g. for sample rates */
static void
gst_ffmpeg_mux_simple_caps_set_int_list (GstCaps * caps, const gchar * field,
guint num, const gint * values)
{
GValue list = { 0, };
GValue val = { 0, };
guint i;
g_return_if_fail (GST_CAPS_IS_SIMPLE (caps));
g_value_init (&list, GST_TYPE_LIST);
g_value_init (&val, G_TYPE_INT);
for (i = 0; i < num; ++i) {
g_value_set_int (&val, values[i]);
gst_value_list_append_value (&list, &val);
}
gst_structure_set_value (gst_caps_get_structure (caps, 0), field, &list);
g_value_unset (&val);
g_value_unset (&list);
}
gboolean
gst_ffmpegmux_register (GstPlugin * plugin)
{
GTypeInfo typeinfo = {
sizeof (GstFFMpegMuxClass),
(GBaseInitFunc) gst_ffmpegmux_base_init,
NULL,
(GClassInitFunc) gst_ffmpegmux_class_init,
NULL,
NULL,
sizeof (GstFFMpegMux),
0,
(GInstanceInitFunc) gst_ffmpegmux_init,
};
static const GInterfaceInfo tag_setter_info = {
NULL, NULL, NULL
};
GType type;
const AVOutputFormat *in_plugin;
void *i = 0;
GST_LOG ("Registering muxers");
while ((in_plugin = av_muxer_iterate (&i))) {
gchar *type_name;
GstRank rank = GST_RANK_MARGINAL;
if ((!strncmp (in_plugin->name, "u16", 3)) ||
(!strncmp (in_plugin->name, "s16", 3)) ||
(!strncmp (in_plugin->name, "u24", 3)) ||
(!strncmp (in_plugin->name, "s24", 3)) ||
(!strncmp (in_plugin->name, "u8", 2)) ||
(!strncmp (in_plugin->name, "s8", 2)) ||
(!strncmp (in_plugin->name, "u32", 3)) ||
(!strncmp (in_plugin->name, "s32", 3)) ||
(!strncmp (in_plugin->name, "f32", 3)) ||
(!strncmp (in_plugin->name, "f64", 3)) ||
(!strncmp (in_plugin->name, "raw", 3)) ||
(!strncmp (in_plugin->name, "crc", 3)) ||
(!strncmp (in_plugin->name, "null", 4)) ||
(!strncmp (in_plugin->name, "gif", 3)) ||
(!strncmp (in_plugin->name, "fifo", 4)) ||
(!strncmp (in_plugin->name, "frame", 5)) ||
(!strncmp (in_plugin->name, "image", 5)) ||
(!strncmp (in_plugin->name, "mulaw", 5)) ||
(!strncmp (in_plugin->name, "alaw", 4)) ||
(!strncmp (in_plugin->name, "h26", 3)) ||
(!strncmp (in_plugin->name, "rtp", 3)) ||
(!strncmp (in_plugin->name, "ass", 3)) ||
(!strncmp (in_plugin->name, "ffmetadata", 10)) ||
(!strncmp (in_plugin->name, "srt", 3)) ||
(!strncmp (in_plugin->name, "scc", 3)) ||
!strcmp (in_plugin->name, "ttml") ||
!strcmp (in_plugin->name, "segment") ||
!strcmp (in_plugin->name, "stream_segment,ssegment") ||
!strcmp (in_plugin->name, "jacosub") ||
!strcmp (in_plugin->name, "webvtt") ||
!strcmp (in_plugin->name, "lrc") ||
!strcmp (in_plugin->name, "microdvd") ||
!strcmp (in_plugin->name, "tee") ||
!strncmp (in_plugin->name, "webm", 4)
) {
GST_LOG ("Ignoring muxer %s", in_plugin->name);
continue;
}
if (in_plugin->long_name != NULL) {
if ((!strncmp (in_plugin->long_name, "raw ", 4))) {
GST_LOG ("Ignoring raw muxer %s", in_plugin->name);
continue;
}
}
if (gst_ffmpegmux_get_replacement (in_plugin->name))
rank = GST_RANK_NONE;
/* FIXME : We need a fast way to know whether we have mappings for this
* muxer type. */
/* construct the type */
type_name = g_strdup_printf ("avmux_%s", in_plugin->name);
g_strdelimit (type_name, ".,|-<> ", '_');
type = g_type_from_name (type_name);
if (!type) {
/* create the type now */
type = g_type_register_static (GST_TYPE_ELEMENT, type_name, &typeinfo, 0);
g_type_set_qdata (type, GST_FFMUX_PARAMS_QDATA, (gpointer) in_plugin);
g_type_add_interface_static (type, GST_TYPE_TAG_SETTER, &tag_setter_info);
}
if (!gst_element_register (plugin, type_name, rank, type)) {
g_free (type_name);
return FALSE;
}
g_free (type_name);
}
GST_LOG ("Finished registering muxers");
return TRUE;
}
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