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gstreamer/gst/flv/gstflvmux.c
Sebastian Dröge 6734a9980e flv: Add documentation to flvmux and flvdemux 
Partially fixes bug #573737.
2009-04-22 19:52:05 +02:00

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/* GStreamer
*
* Copyright (c) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-flvmux
*
* flvmux muxes different streams into an FLV file.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v filesrc location=/path/to/audio ! decodebin2 ! queue ! flvmux name=m ! filesink location=file.flv filesrc location=/path/to/video ! decodebin2 ! queue ! m.
* ]| This pipeline muxes an audio and video file into a single FLV file.
* </refsect2>
*/
/* TODO:
* - Write metadata for the file, see FLV spec page 13
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#include <string.h>
#include "gstflvmux.h"
GST_DEBUG_CATEGORY_STATIC (flvmux_debug);
#define GST_CAT_DEFAULT flvmux_debug
static GstStaticPadTemplate src_templ = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-flv")
);
static GstStaticPadTemplate videosink_templ = GST_STATIC_PAD_TEMPLATE ("video",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("video/x-flash-video; "
"video/x-flash-screen; "
"video/x-vp6-flash; " "video/x-vp6-alpha; " "video/x-h264;")
);
static GstStaticPadTemplate audiosink_templ = GST_STATIC_PAD_TEMPLATE ("audio",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS
("audio/x-adpcm, layout = (string) swf, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 }; "
"audio/mpeg, mpegversion = (int) 1, layer = (int) 3, channels = (int) { 1, 2 }, rate = (int) { 5512, 8000, 11025, 22050, 44100 }; "
"audio/mpeg, mpegversion = (int) 4; "
"audio/x-nellymoser, channels = (int) { 1, 2 }, rate = (int) { 5512, 8000, 11025, 16000, 22050, 44100 }; "
"audio/x-raw-int, endianness = (int) LITTLE_ENDIAN, channels = (int) { 1, 2 }, width = (int) 8, depth = (int) 8, rate = (int) { 5512, 11025, 22050, 44100 }, signed = (boolean) FALSE; "
"audio/x-raw-int, endianness = (int) LITTLE_ENDIAN, channels = (int) { 1, 2 }, width = (int) 16, depth = (int) 16, rate = (int) { 5512, 11025, 22050, 44100 }, signed = (boolean) TRUE; "
"audio/x-alaw, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 }; "
"audio/x-mulaw, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 }; "
"audio/x-speex, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 };")
);
GST_BOILERPLATE (GstFlvMux, gst_flv_mux, GstElement, GST_TYPE_ELEMENT);
static void gst_flv_mux_finalize (GObject * object);
static GstFlowReturn
gst_flv_mux_collected (GstCollectPads * pads, gpointer user_data);
static gboolean gst_flv_mux_handle_src_event (GstPad * pad, GstEvent * event);
static GstPad *gst_flv_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name);
static void gst_flv_mux_release_pad (GstElement * element, GstPad * pad);
static GstStateChangeReturn
gst_flv_mux_change_state (GstElement * element, GstStateChange transition);
static void gst_flv_mux_reset (GstElement * element);
static void
gst_flv_mux_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&videosink_templ));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&audiosink_templ));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_templ));
gst_element_class_set_details_simple (element_class, "FLV muxer",
"Codec/Muxer",
"Muxes video/audio streams into a FLV stream",
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
GST_DEBUG_CATEGORY_INIT (flvmux_debug, "flvmux", 0, "FLV muxer");
}
static void
gst_flv_mux_class_init (GstFlvMuxClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GST_DEBUG_CATEGORY_INIT (flvmux_debug, "flvmux", 0, "FLV muxer");
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->finalize = gst_flv_mux_finalize;
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_flv_mux_change_state);
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_flv_mux_request_new_pad);
gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_flv_mux_release_pad);
}
static void
gst_flv_mux_init (GstFlvMux * mux, GstFlvMuxClass * g_class)
{
mux->srcpad = gst_pad_new_from_static_template (&src_templ, "src");
gst_pad_set_event_function (mux->srcpad, gst_flv_mux_handle_src_event);
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 (gst_flv_mux_collected), mux);
gst_flv_mux_reset (GST_ELEMENT (mux));
}
static void
gst_flv_mux_finalize (GObject * object)
{
GstFlvMux *mux = GST_FLV_MUX (object);
gst_object_unref (mux->collect);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_flv_mux_reset (GstElement * element)
{
GstFlvMux *mux = GST_FLV_MUX (element);
GSList *sl;
while ((sl = mux->collect->data) != NULL) {
GstFlvPad *cpad = (GstFlvPad *) sl->data;
if (cpad->audio_codec_data)
gst_buffer_unref (cpad->audio_codec_data);
if (cpad->video_codec_data)
gst_buffer_unref (cpad->video_codec_data);
gst_collect_pads_remove_pad (mux->collect, cpad->collect.pad);
}
mux->state = GST_FLV_MUX_STATE_HEADER;
}
static gboolean
gst_flv_mux_handle_src_event (GstPad * pad, GstEvent * event)
{
GstEventType type;
type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
switch (type) {
case GST_EVENT_SEEK:
/* disable seeking for now */
return FALSE;
default:
break;
}
return gst_pad_event_default (pad, event);
}
static gboolean
gst_flv_mux_handle_sink_event (GstPad * pad, GstEvent * event)
{
GstFlvMux *mux = GST_FLV_MUX (gst_pad_get_parent (pad));
gboolean ret = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_TAG:
/* TODO do something with the tags */
break;
case GST_EVENT_NEWSEGMENT:
/* We don't support NEWSEGMENT events */
ret = FALSE;
gst_event_unref (event);
break;
default:
break;
}
/* now GstCollectPads can take care of the rest, e.g. EOS */
if (ret)
ret = mux->collect_event (pad, event);
gst_object_unref (mux);
return ret;
}
static gboolean
gst_flv_mux_video_pad_setcaps (GstPad * pad, GstCaps * caps)
{
GstFlvMux *mux = GST_FLV_MUX (gst_pad_get_parent (pad));
GstFlvPad *cpad = (GstFlvPad *) gst_pad_get_element_private (pad);
gboolean ret = TRUE;
GstStructure *s;
s = gst_caps_get_structure (caps, 0);
if (strcmp (gst_structure_get_name (s), "video/x-flash-video") == 0) {
cpad->video_codec = 2;
} else if (strcmp (gst_structure_get_name (s), "video/x-flash-screen") == 0) {
cpad->video_codec = 3;
} else if (strcmp (gst_structure_get_name (s), "video/x-vp6-flash") == 0) {
cpad->video_codec = 4;
} else if (strcmp (gst_structure_get_name (s), "video/x-vp6-alpha") == 0) {
cpad->video_codec = 5;
} else if (strcmp (gst_structure_get_name (s), "video/x-h264") == 0) {
cpad->video_codec = 7;
} else {
ret = FALSE;
}
if (ret && gst_structure_has_field (s, "codec_data")) {
const GValue *val = gst_structure_get_value (s, "codec_data");
if (val) {
cpad->video_codec_data = gst_buffer_ref (gst_value_get_buffer (val));
cpad->sent_codec_data = FALSE;
} else {
cpad->sent_codec_data = TRUE;
}
} else {
cpad->sent_codec_data = TRUE;
}
gst_object_unref (mux);
return ret;
}
static gboolean
gst_flv_mux_audio_pad_setcaps (GstPad * pad, GstCaps * caps)
{
GstFlvMux *mux = GST_FLV_MUX (gst_pad_get_parent (pad));
GstFlvPad *cpad = (GstFlvPad *) gst_pad_get_element_private (pad);
gboolean ret = TRUE;
GstStructure *s;
s = gst_caps_get_structure (caps, 0);
if (strcmp (gst_structure_get_name (s), "audio/x-adpcm") == 0) {
const gchar *layout = gst_structure_get_string (s, "layout");
if (layout && strcmp (layout, "swf") == 0) {
cpad->audio_codec = 1;
} else {
ret = FALSE;
}
} else if (strcmp (gst_structure_get_name (s), "audio/mpeg") == 0) {
gint mpegversion;
if (gst_structure_get_int (s, "mpegversion", &mpegversion)) {
if (mpegversion == 1) {
gint layer;
if (gst_structure_get_int (s, "layer", &layer) && layer == 3) {
gint rate;
if (gst_structure_get_int (s, "rate", &rate) && rate == 8000)
cpad->audio_codec = 14;
else
cpad->audio_codec = 2;
} else {
ret = FALSE;
}
} else if (mpegversion == 4) {
cpad->audio_codec = 10;
} else {
ret = FALSE;
}
} else {
ret = FALSE;
}
} else if (strcmp (gst_structure_get_name (s), "audio/x-nellymoser") == 0) {
gint rate, channels;
if (gst_structure_get_int (s, "rate", &rate)
&& gst_structure_get_int (s, "channels", &channels)) {
if (channels == 1 && rate == 16000)
cpad->audio_codec = 4;
else if (channels == 1 && rate == 8000)
cpad->audio_codec = 5;
} else {
cpad->audio_codec = 6;
}
} else if (strcmp (gst_structure_get_name (s), "audio/x-raw-int") == 0) {
gint endianness;
if (gst_structure_get_int (s, "endianness", &endianness)
&& endianness == G_LITTLE_ENDIAN)
cpad->audio_codec = 3;
else
ret = FALSE;
} else if (strcmp (gst_structure_get_name (s), "audio/x-alaw") == 0) {
cpad->audio_codec = 7;
} else if (strcmp (gst_structure_get_name (s), "audio/x-mulaw") == 0) {
cpad->audio_codec = 8;
} else if (strcmp (gst_structure_get_name (s), "audio/x-speex") == 0) {
cpad->audio_codec = 11;
} else {
ret = FALSE;
}
if (ret) {
gint rate, channels, width;
if (gst_structure_get_int (s, "rate", &rate)) {
if (cpad->audio_codec == 10)
cpad->rate = 3;
else if (rate == 5512)
cpad->rate = 0;
else if (rate == 11025)
cpad->rate = 1;
else if (rate == 22050)
cpad->rate = 2;
else if (rate == 44100)
cpad->rate = 3;
else if (rate == 8000 && (cpad->audio_codec == 5
|| cpad->audio_codec == 14))
cpad->rate = 0;
else if (rate == 16000 && cpad->audio_codec == 4)
cpad->rate = 0;
else
ret = FALSE;
} else if (cpad->audio_codec == 10) {
cpad->rate = 3;
} else {
ret = FALSE;
}
if (gst_structure_get_int (s, "channels", &channels)) {
if (cpad->audio_codec == 4 || cpad->audio_codec == 5
|| cpad->audio_codec == 6)
cpad->channels = 0;
else if (cpad->audio_codec == 10)
cpad->channels = 1;
else if (channels == 1)
cpad->channels = 0;
else if (channels == 2)
cpad->channels = 1;
else
ret = FALSE;
} else if (cpad->audio_codec == 4 || cpad->audio_codec == 5
|| cpad->audio_codec == 6) {
cpad->channels = 0;
} else if (cpad->audio_codec == 10) {
cpad->channels = 1;
} else {
ret = FALSE;
}
if (gst_structure_get_int (s, "width", &width)) {
if (cpad->audio_codec != 3)
cpad->width = 1;
else if (width == 8)
cpad->width = 0;
else if (width == 16)
cpad->width = 1;
else
ret = FALSE;
} else if (cpad->audio_codec != 3) {
cpad->width = 1;
} else {
ret = FALSE;
}
}
if (ret && gst_structure_has_field (s, "codec_data")) {
const GValue *val = gst_structure_get_value (s, "codec_data");
if (val) {
cpad->audio_codec_data = gst_buffer_ref (gst_value_get_buffer (val));
cpad->sent_codec_data = FALSE;
} else {
cpad->sent_codec_data = TRUE;
}
} else {
cpad->sent_codec_data = TRUE;
}
gst_object_unref (mux);
return ret;
}
static GstPad *
gst_flv_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * pad_name)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
GstFlvMux *mux = GST_FLV_MUX (element);
GstFlvPad *cpad;
GstPad *pad = NULL;
const gchar *name = NULL;
GstPadSetCapsFunction setcapsfunc = NULL;
gboolean video;
if (mux->state != GST_FLV_MUX_STATE_HEADER) {
GST_WARNING_OBJECT (mux, "Can't request pads after writing header");
return NULL;
}
if (templ == gst_element_class_get_pad_template (klass, "audio")) {
if (mux->have_audio) {
GST_WARNING_OBJECT (mux, "Already have an audio pad");
return NULL;
}
mux->have_audio = TRUE;
name = "audio";
video = FALSE;
setcapsfunc = GST_DEBUG_FUNCPTR (gst_flv_mux_audio_pad_setcaps);
} else if (templ == gst_element_class_get_pad_template (klass, "video")) {
if (mux->have_video) {
GST_WARNING_OBJECT (mux, "Already have a video pad");
return NULL;
}
mux->have_video = TRUE;
name = "video";
video = TRUE;
setcapsfunc = GST_DEBUG_FUNCPTR (gst_flv_mux_video_pad_setcaps);
} else {
GST_WARNING_OBJECT (mux, "Invalid template");
return NULL;
}
pad = gst_pad_new_from_template (templ, name);
cpad = (GstFlvPad *)
gst_collect_pads_add_pad (mux->collect, pad, sizeof (GstFlvPad));
cpad->video = video;
cpad->audio_codec = G_MAXUINT;
cpad->rate = G_MAXUINT;
cpad->width = G_MAXUINT;
cpad->channels = G_MAXUINT;
cpad->audio_codec_data = NULL;
cpad->video_codec = G_MAXUINT;
cpad->video_codec_data = NULL;
cpad->sent_codec_data = FALSE;
cpad->last_timestamp = 0;
/* FIXME: hacked way to override/extend the event function of
* GstCollectPads; because it sets its own event function giving the
* element no access to events.
*/
mux->collect_event = (GstPadEventFunction) GST_PAD_EVENTFUNC (pad);
gst_pad_set_event_function (pad,
GST_DEBUG_FUNCPTR (gst_flv_mux_handle_sink_event));
gst_pad_set_setcaps_function (pad, setcapsfunc);
gst_pad_set_active (pad, TRUE);
gst_element_add_pad (element, pad);
return pad;
}
static void
gst_flv_mux_release_pad (GstElement * element, GstPad * pad)
{
GstFlvMux *mux = GST_FLV_MUX (GST_PAD_PARENT (pad));
GstFlvPad *cpad = (GstFlvPad *) gst_pad_get_element_private (pad);
if (cpad && cpad->audio_codec_data)
gst_buffer_unref (cpad->audio_codec_data);
if (cpad && cpad->video_codec_data)
gst_buffer_unref (cpad->video_codec_data);
gst_collect_pads_remove_pad (mux->collect, pad);
gst_element_remove_pad (element, pad);
}
static GstFlowReturn
gst_flv_mux_write_header (GstFlvMux * mux)
{
GstBuffer *header = gst_buffer_new_and_alloc (9 + 4);
guint8 *data = GST_BUFFER_DATA (header);
if (GST_PAD_CAPS (mux->srcpad) == NULL) {
GstCaps *caps = gst_caps_new_simple ("video/x-flv", NULL);
gst_pad_set_caps (mux->srcpad, caps);
gst_caps_unref (caps);
}
gst_buffer_set_caps (header, GST_PAD_CAPS (mux->srcpad));
data[0] = 'F';
data[1] = 'L';
data[2] = 'V';
data[3] = 0x01; /* Version */
data[4] = (mux->have_audio << 2) | mux->have_video; /* flags */
GST_WRITE_UINT32_BE (data + 5, 9); /* data offset */
GST_WRITE_UINT32_BE (data + 9, 0); /* previous tag size */
return gst_pad_push (mux->srcpad, header);
}
static GstFlowReturn
gst_flv_mux_write_buffer (GstFlvMux * mux, GstFlvPad * cpad)
{
GstBuffer *tag;
guint8 *data;
guint size;
GstBuffer *buffer =
gst_collect_pads_pop (mux->collect, (GstCollectData *) cpad);
guint32 timestamp =
(GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) ? GST_BUFFER_TIMESTAMP (buffer) /
GST_MSECOND : cpad->last_timestamp / GST_MSECOND;
gboolean second_run = FALSE;
GstFlowReturn ret;
next:
size = 11;
if (cpad->video) {
size += 1;
if (cpad->video_codec == 7 && !cpad->sent_codec_data)
size += 4 + GST_BUFFER_SIZE (cpad->video_codec_data);
else if (cpad->video_codec == 7)
size += 4 + GST_BUFFER_SIZE (buffer);
else
size += GST_BUFFER_SIZE (buffer);
} else {
size += 1;
if (cpad->audio_codec == 10 && !cpad->sent_codec_data)
size += 1 + GST_BUFFER_SIZE (cpad->audio_codec_data);
else if (cpad->audio_codec == 10)
size += 1 + GST_BUFFER_SIZE (buffer);
else
size += GST_BUFFER_SIZE (buffer);
}
size += 4;
tag = gst_buffer_new_and_alloc (size);
data = GST_BUFFER_DATA (tag);
memset (data, 0, size);
data[0] = (cpad->video) ? 9 : 8;
data[1] = ((size - 11 - 4) >> 16) & 0xff;
data[2] = ((size - 11 - 4) >> 8) & 0xff;
data[3] = ((size - 11 - 4) >> 0) & 0xff;
data[4] = (timestamp >> 16) & 0xff;
data[5] = (timestamp >> 8) & 0xff;
data[6] = (timestamp >> 0) & 0xff;
data[7] = (timestamp >> 24) & 0xff;
data[8] = data[9] = data[10] = 0;
if (cpad->video) {
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT))
data[11] |= 2 << 4;
else
data[11] |= 1 << 4;
data[11] |= cpad->video_codec & 0x0f;
if (cpad->video_codec == 7 && !cpad->sent_codec_data) {
data[12] = 0;
data[13] = data[14] = data[15] = 0;
memcpy (data + 11 + 1 + 4, GST_BUFFER_DATA (cpad->video_codec_data),
GST_BUFFER_SIZE (cpad->video_codec_data));
second_run = TRUE;
} else if (cpad->video_codec == 7) {
data[12] = 1;
/* FIXME: what to do about composition time */
data[13] = data[14] = data[15] = 0;
memcpy (data + 11 + 1 + 4, GST_BUFFER_DATA (buffer),
GST_BUFFER_SIZE (buffer));
} else {
memcpy (data + 11 + 1, GST_BUFFER_DATA (buffer),
GST_BUFFER_SIZE (buffer));
}
} else {
data[11] |= (cpad->audio_codec << 4) & 0xf0;
data[11] |= (cpad->rate << 2) & 0x0c;
data[11] |= (cpad->width << 1) & 0x02;
data[11] |= (cpad->channels << 0) & 0x01;
if (cpad->audio_codec == 10 && !cpad->sent_codec_data) {
data[12] = 0;
memcpy (data + 11 + 1 + 1, GST_BUFFER_DATA (cpad->audio_codec_data),
GST_BUFFER_SIZE (cpad->audio_codec_data));
second_run = TRUE;
} else if (cpad->audio_codec == 10) {
data[12] = 1;
memcpy (data + 11 + 1 + 1, GST_BUFFER_DATA (buffer),
GST_BUFFER_SIZE (buffer));
} else {
memcpy (data + 11 + 1, GST_BUFFER_DATA (buffer),
GST_BUFFER_SIZE (buffer));
}
}
GST_WRITE_UINT32_BE (data + size - 4, size - 4);
gst_buffer_set_caps (tag, GST_PAD_CAPS (mux->srcpad));
if (second_run) {
second_run = FALSE;
cpad->sent_codec_data = TRUE;
ret = gst_pad_push (mux->srcpad, tag);
if (ret != GST_FLOW_OK) {
gst_buffer_unref (buffer);
return ret;
}
cpad->last_timestamp = timestamp;
tag = NULL;
goto next;
}
gst_buffer_copy_metadata (tag, buffer, GST_BUFFER_COPY_TIMESTAMPS);
GST_BUFFER_OFFSET (tag) = GST_BUFFER_OFFSET_END (tag) =
GST_BUFFER_OFFSET_NONE;
gst_buffer_unref (buffer);
ret = gst_pad_push (mux->srcpad, tag);
if (ret == GST_FLOW_OK)
cpad->last_timestamp = timestamp;
return ret;
}
static GstFlowReturn
gst_flv_mux_collected (GstCollectPads * pads, gpointer user_data)
{
GstFlvMux *mux = GST_FLV_MUX (user_data);
GstFlvPad *best;
GstClockTime best_time;
GstFlowReturn ret;
GSList *sl;
gboolean eos = TRUE;
if (mux->state == GST_FLV_MUX_STATE_HEADER) {
if (mux->collect->data == NULL) {
GST_ELEMENT_ERROR (mux, STREAM, MUX, (NULL),
("No input streams configured"));
return GST_FLOW_ERROR;
}
if (gst_pad_push_event (mux->srcpad,
gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES, 0, -1, 0)))
ret = gst_flv_mux_write_header (mux);
else
ret = GST_FLOW_ERROR;
if (ret != GST_FLOW_OK)
return ret;
mux->state = GST_FLV_MUX_STATE_DATA;
}
best = NULL;
best_time = GST_CLOCK_TIME_NONE;
for (sl = mux->collect->data; sl; sl = sl->next) {
GstFlvPad *cpad = sl->data;
GstBuffer *buffer = gst_collect_pads_peek (pads, (GstCollectData *) cpad);
GstClockTime time;
if (!buffer)
continue;
eos = FALSE;
time = GST_BUFFER_TIMESTAMP (buffer);
gst_buffer_unref (buffer);
/* Use buffers without valid timestamp first */
if (!GST_CLOCK_TIME_IS_VALID (time)) {
GST_WARNING_OBJECT (pads, "Buffer without valid timestamp");
best_time = cpad->last_timestamp;
best = cpad;
break;
}
if (best == NULL || (GST_CLOCK_TIME_IS_VALID (best_time)
&& time < best_time)) {
best = cpad;
best_time = time;
}
}
if (GST_CLOCK_TIME_IS_VALID (best_time)
&& best_time / GST_MSECOND > G_MAXUINT32) {
GST_WARNING_OBJECT (mux, "Timestamp larger than FLV supports - EOS");
eos = TRUE;
}
if (!eos && best) {
return gst_flv_mux_write_buffer (mux, best);
} else if (eos) {
gst_pad_push_event (mux->srcpad, gst_event_new_eos ());
return GST_FLOW_UNEXPECTED;
} else {
return GST_FLOW_OK;
}
}
static GstStateChangeReturn
gst_flv_mux_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstFlvMux *mux = GST_FLV_MUX (element);
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;
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_flv_mux_reset (GST_ELEMENT (mux));
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
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