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gstreamer/gst/matroska/matroska-mux.c
Mark Nauwelaerts d4e266cd6d gst/matroska/matroska-mux.c: gst_collect_pads_stop() needs to be called before chaining up to the parent class (#3427... 
Original commit message from CVS:
Patch by: Mark Nauwelaerts  <manauw at skynet be>
* gst/matroska/matroska-mux.c: (gst_matroska_mux_change_state):
gst_collect_pads_stop() needs to be called before chaining up
to the parent class (#342734).
2006-05-23 20:15:04 +00:00

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/* GStreamer Matroska muxer/demuxer
* (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
* (c) 2005 Michal Benes <michal.benes@xeris.cz>
*
* matroska-mux.c: matroska file/stream muxer
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#include <string.h>
#include "matroska-mux.h"
#include "matroska-ids.h"
GST_DEBUG_CATEGORY_STATIC (matroskamux_debug);
#define GST_CAT_DEFAULT matroskamux_debug
enum
{
ARG_0,
ARG_WRITING_APP,
ARG_MATROSKA_VERSION
};
static GstStaticPadTemplate src_templ = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-matroska")
);
#define COMMON_VIDEO_CAPS \
"width = (int) [ 16, 4096 ], " \
"height = (int) [ 16, 4096 ], " \
"framerate = (fraction) [ 0, MAX ]"
static GstStaticPadTemplate videosink_templ =
GST_STATIC_PAD_TEMPLATE ("video_%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("video/mpeg, "
"mpegversion = (int) { 1, 2, 4 }, "
"systemstream = (boolean) false, "
COMMON_VIDEO_CAPS "; "
"video/x-h264, "
COMMON_VIDEO_CAPS "; "
"video/x-divx, "
COMMON_VIDEO_CAPS "; "
"video/x-xvid, "
COMMON_VIDEO_CAPS "; "
"video/x-huffyuv, "
COMMON_VIDEO_CAPS "; "
"video/x-dv, "
COMMON_VIDEO_CAPS "; "
"video/x-h263, "
COMMON_VIDEO_CAPS "; "
"video/x-msmpeg, "
COMMON_VIDEO_CAPS "; "
"image/jpeg, "
COMMON_VIDEO_CAPS "; "
"video/x-theora; "
"video/x-raw-yuv, "
"format = (fourcc) { YUY2, I420 }, " COMMON_VIDEO_CAPS)
);
#define COMMON_AUDIO_CAPS \
"channels = (int) [ 1, 8 ], " \
"rate = (int) [ 8000, 96000 ]"
/* FIXME:
* * audio/x-raw-float: endianness needs defining.
*/
static GstStaticPadTemplate audiosink_templ =
GST_STATIC_PAD_TEMPLATE ("audio_%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("audio/mpeg, "
"mpegversion = (int) 1, "
"layer = (int) [ 1, 3 ], "
COMMON_AUDIO_CAPS "; "
"audio/mpeg, "
"mpegversion = (int) { 2, 4 }, "
COMMON_AUDIO_CAPS "; "
"audio/x-ac3, "
COMMON_AUDIO_CAPS "; "
"audio/x-vorbis, "
COMMON_AUDIO_CAPS "; "
"audio/x-raw-int, "
"width = (int) { 8, 16, 24 }, "
"depth = (int) { 8, 16, 24 }, "
"endianness = (int) { BIG_ENDIAN, LITTLE_ENDIAN }, "
"signed = (boolean) { true, false }, "
COMMON_AUDIO_CAPS ";"
"audio/x-tta, "
"width = (int) { 8, 16, 24 }, "
"channels = (int) { 1, 2 }, " "rate = (int) [ 8000, 96000 ]")
);
static GstStaticPadTemplate subtitlesink_templ =
GST_STATIC_PAD_TEMPLATE ("subtitle_%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GArray *used_uids;
GST_BOILERPLATE (GstMatroskaMux, gst_matroska_mux, GstElement,
GST_TYPE_ELEMENT);
/* Matroska muxer destructor */
static void gst_matroska_mux_finalize (GObject * object);
/* Pads collected callback */
static GstFlowReturn
gst_matroska_mux_collected (GstCollectPads * pads, gpointer user_data);
/* pad functions */
static gboolean gst_matroska_mux_handle_src_event (GstPad * pad,
GstEvent * event);
static GstPad *gst_matroska_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name);
/* gst internal change state handler */
static GstStateChangeReturn
gst_matroska_mux_change_state (GstElement * element, GstStateChange transition);
/* gobject bla bla */
static void gst_matroska_mux_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_matroska_mux_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
/* reset muxer */
static void gst_matroska_mux_reset (GstElement * element);
/* uid generation */
static guint32 gst_matroska_mux_create_uid ();
static gboolean theora_streamheader_to_codecdata (const GValue * streamheader,
GstMatroskaTrackContext * context);
static gboolean vorbis_streamheader_to_codecdata (const GValue * streamheader,
GstMatroskaTrackContext * context);
static void
gst_matroska_mux_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
static const GstElementDetails gst_matroska_mux_details =
GST_ELEMENT_DETAILS ("Matroska muxer",
"Codec/Muxer",
"Muxes video/audio/subtitle streams into a matroska stream",
"Ronald Bultje <rbultje@ronald.bitfreak.net>");
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 (&subtitlesink_templ));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_templ));
gst_element_class_set_details (element_class, &gst_matroska_mux_details);
GST_DEBUG_CATEGORY_INIT (matroskamux_debug, "matroskamux", 0,
"Matroska muxer");
}
static void
gst_matroska_mux_class_init (GstMatroskaMuxClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_matroska_mux_finalize);
gobject_class->get_property = gst_matroska_mux_get_property;
gobject_class->set_property = gst_matroska_mux_set_property;
g_object_class_install_property (gobject_class, ARG_WRITING_APP,
g_param_spec_string ("writing-app", "Writing application.",
"The name the application that creates the matroska file.",
NULL, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_MATROSKA_VERSION,
g_param_spec_int ("version", "Matroska version",
"This parameter determines what matroska features can be used.",
1, 2, 1, G_PARAM_READWRITE));
gstelement_class->change_state = gst_matroska_mux_change_state;
gstelement_class->request_new_pad = gst_matroska_mux_request_new_pad;
}
/**
* gst_matroska_mux_init:
* @mux: #GstMatroskaMux that should be initialized.
* @g_class: Class of the muxer.
*
* Matroska muxer constructor.
*/
static void
gst_matroska_mux_init (GstMatroskaMux * mux, GstMatroskaMuxClass * g_class)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
mux->srcpad =
gst_pad_new_from_template (gst_element_class_get_pad_template
(gstelement_class, "src"), "src");
gst_pad_set_event_function (mux->srcpad, gst_matroska_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_matroska_mux_collected),
mux);
mux->ebml_write = gst_ebml_write_new (mux->srcpad);
/* initialize internal variables */
mux->index = NULL;
mux->matroska_version = 1;
/* Initialize all variables */
gst_matroska_mux_reset (GST_ELEMENT (mux));
}
/**
* gst_matroska_mux_finalize:
* @object: #GstMatroskaMux that should be finalized.
*
* Finalize matroska muxer.
*/
static void
gst_matroska_mux_finalize (GObject * object)
{
GstMatroskaMux *mux = GST_MATROSKA_MUX (object);
gst_object_unref (mux->collect);
gst_object_unref (mux->ebml_write);
if (mux->writing_app)
g_free (mux->writing_app);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/**
* gst_matroska_mux_create_uid:
*
* Generate new unused track UID.
*
* Returns: New track UID.
*/
static guint32
gst_matroska_mux_create_uid (void)
{
guint32 uid = 0;
GRand *rand = g_rand_new ();
while (!uid) {
guint i;
uid = g_rand_int (rand);
for (i = 0; i < used_uids->len; i++) {
if (g_array_index (used_uids, guint32, i) == uid) {
uid = 0;
break;
}
}
g_array_append_val (used_uids, uid);
}
g_free (rand);
return uid;
}
/**
* gst_matroska_mux_reset:
* @element: #GstMatroskaMux that should be reseted.
*
* Reset matroska muxer back to initial state.
*/
static void
gst_matroska_mux_reset (GstElement * element)
{
GstMatroskaMux *mux = GST_MATROSKA_MUX (element);
GSList *walk;
/* reset EBML write */
gst_ebml_write_reset (mux->ebml_write);
/* reset input */
mux->state = GST_MATROSKA_MUX_STATE_START;
/* clean up existing streams */
while ((walk = mux->collect->data) != NULL) {
GstMatroskaPad *collect_pad;
GstPad *thepad;
collect_pad = (GstMatroskaPad *) walk->data;
thepad = collect_pad->collect.pad;
/* free track information */
if (collect_pad->track != NULL) {
g_free (collect_pad->track->codec_id);
g_free (collect_pad->track->codec_name);
g_free (collect_pad->track->name);
g_free (collect_pad->track->language);
g_free (collect_pad->track->codec_priv);
g_free (collect_pad->track);
collect_pad->track = NULL;
}
/* free cached buffer */
if (collect_pad->buffer != NULL) {
gst_buffer_unref (collect_pad->buffer);
collect_pad->buffer = NULL;
}
/* remove from collectpads */
gst_collect_pads_remove_pad (mux->collect, thepad);
}
mux->num_streams = 0;
mux->num_a_streams = 0;
mux->num_t_streams = 0;
mux->num_v_streams = 0;
/* reset writing_app */
if (mux->writing_app) {
g_free (mux->writing_app);
}
mux->writing_app = g_strdup ("GStreamer Matroska muxer");
/* reset indexes */
mux->num_indexes = 0;
g_free (mux->index);
mux->index = NULL;
/* reset timers */
mux->time_scale = 1000000;
mux->duration = 0;
/* reset uid array */
if (used_uids) {
g_array_free (used_uids, TRUE);
}
/* arbitrary size, 10 should be enough in most cases */
used_uids = g_array_sized_new (FALSE, FALSE, sizeof (guint32), 10);
/* reset cluster */
mux->cluster = 0;
mux->cluster_time = 0;
mux->cluster_pos = 0;
/* reset meta-seek index */
mux->num_meta_indexes = 0;
g_free (mux->meta_index);
mux->meta_index = NULL;
}
/**
* gst_matroska_mux_handle_src_event:
* @pad: Pad which received the event.
* @event: Received event.
*
* handle events - copied from oggmux without understanding
*
* Returns: #TRUE on success.
*/
static gboolean
gst_matroska_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);
}
/**
* gst_matroska_mux_video_pad_setcaps:
* @pad: Pad which got the caps.
* @caps: New caps.
*
* Setcaps function for video sink pad.
*
* Returns: #TRUE on success.
*/
static gboolean
gst_matroska_mux_video_pad_setcaps (GstPad * pad, GstCaps * caps)
{
GstMatroskaTrackContext *context = NULL;
GstMatroskaTrackVideoContext *videocontext;
GstMatroskaMux *mux;
GstMatroskaPad *collect_pad;
const gchar *mimetype;
gint width, height, pixel_width, pixel_height;
const GValue *framerate;
GstStructure *structure;
mux = GST_MATROSKA_MUX (GST_PAD_PARENT (pad));
/* find context */
collect_pad = (GstMatroskaPad *) gst_pad_get_element_private (pad);
g_assert (collect_pad);
context = collect_pad->track;
g_assert (context);
g_assert (context->type == GST_MATROSKA_TRACK_TYPE_VIDEO);
videocontext = (GstMatroskaTrackVideoContext *) context;
/* gst -> matroska ID'ing */
structure = gst_caps_get_structure (caps, 0);
mimetype = gst_structure_get_name (structure);
if (!strcmp (mimetype, "video/x-theora")) {
/* we'll extract the details later from the theora identification header */
goto skip_details;
}
/* get general properties */
gst_structure_get_int (structure, "width", &width);
gst_structure_get_int (structure, "height", &height);
framerate = gst_structure_get_value (structure, "framerate");
if (framerate == NULL || !GST_VALUE_HOLDS_FRACTION (framerate))
return FALSE;
videocontext->pixel_width = width;
videocontext->pixel_height = height;
context->default_duration = gst_util_uint64_scale_int (GST_SECOND,
gst_value_get_fraction_denominator (framerate),
gst_value_get_fraction_numerator (framerate));
if (gst_structure_get_fraction (structure, "pixel-aspect-ratio",
&pixel_width, &pixel_height)) {
if (pixel_width > pixel_height) {
videocontext->display_width = width * pixel_width / pixel_height;
videocontext->display_height = height;
} else if (pixel_width < pixel_height) {
videocontext->display_width = width;
videocontext->display_height = height * pixel_height / pixel_width;
} else {
videocontext->display_width = 0;
videocontext->display_height = 0;
}
} else {
videocontext->display_width = 0;
videocontext->display_height = 0;
}
skip_details:
videocontext->asr_mode = GST_MATROSKA_ASPECT_RATIO_MODE_FREE;
videocontext->eye_mode = GST_MATROSKA_EYE_MODE_MONO;
videocontext->fourcc = 0;
/* find type */
if (!strcmp (mimetype, "video/x-raw-yuv")) {
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_VIDEO_UNCOMPRESSED);
gst_structure_get_fourcc (structure, "format", &videocontext->fourcc);
return TRUE;
} else if (!strcmp (mimetype, "image/jpeg")) {
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_VIDEO_MJPEG);
return TRUE;
} else if (!strcmp (mimetype, "video/x-xvid") /* MS/VfW compatibility cases */
||!strcmp (mimetype, "video/x-huffyuv")
|| !strcmp (mimetype, "video/x-divx")
|| !strcmp (mimetype, "video/x-dv")
|| !strcmp (mimetype, "video/x-h263")) {
BITMAPINFOHEADER *bih;
const GValue *codec_data;
gint size = sizeof (BITMAPINFOHEADER);
bih = g_new0 (BITMAPINFOHEADER, 1);
GST_WRITE_UINT32_LE (&bih->bi_size, size);
GST_WRITE_UINT32_LE (&bih->bi_width, videocontext->pixel_width);
GST_WRITE_UINT32_LE (&bih->bi_height, videocontext->pixel_height);
GST_WRITE_UINT16_LE (&bih->bi_planes, (guint16) 1);
GST_WRITE_UINT16_LE (&bih->bi_bit_count, (guint16) 24);
GST_WRITE_UINT32_LE (&bih->bi_size_image, videocontext->pixel_width *
videocontext->pixel_height * 3);
if (!strcmp (mimetype, "video/x-xvid"))
GST_WRITE_UINT32_LE (&bih->bi_compression, GST_STR_FOURCC ("XVID"));
else if (!strcmp (mimetype, "video/x-huffyuv"))
GST_WRITE_UINT32_LE (&bih->bi_compression, GST_STR_FOURCC ("HFYU"));
else if (!strcmp (mimetype, "video/x-dv"))
GST_WRITE_UINT32_LE (&bih->bi_compression, GST_STR_FOURCC ("DVSD"));
else if (!strcmp (mimetype, "video/x-h263"))
GST_WRITE_UINT32_LE (&bih->bi_compression, GST_STR_FOURCC ("H263"));
else if (!strcmp (mimetype, "video/x-divx")) {
gint divxversion;
gst_structure_get_int (structure, "divxversion", &divxversion);
switch (divxversion) {
case 3:
GST_WRITE_UINT32_LE (&bih->bi_compression, GST_STR_FOURCC ("DIV3"));
break;
case 4:
GST_WRITE_UINT32_LE (&bih->bi_compression, GST_STR_FOURCC ("DIVX"));
break;
case 5:
GST_WRITE_UINT32_LE (&bih->bi_compression, GST_STR_FOURCC ("DX50"));
break;
}
}
/* process codec private/initialization data, if any */
codec_data = gst_structure_get_value (structure, "codec_data");
if (codec_data) {
GstBuffer *codec_data_buf;
codec_data_buf = g_value_peek_pointer (codec_data);
size += GST_BUFFER_SIZE (codec_data_buf);
bih = g_realloc (bih, size);
GST_WRITE_UINT32_LE (&bih->bi_size, size);
memcpy ((guint8 *) bih + sizeof (BITMAPINFOHEADER),
GST_BUFFER_DATA (codec_data_buf), GST_BUFFER_SIZE (codec_data_buf));
}
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_VIDEO_VFW_FOURCC);
context->codec_priv = (gpointer) bih;
context->codec_priv_size = size;
return TRUE;
} else if (!strcmp (mimetype, "video/x-h264")) {
const GValue *codec_data;
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_VIDEO_MPEG4_AVC);
if (context->codec_priv != NULL) {
g_free (context->codec_priv);
context->codec_priv = NULL;
context->codec_priv_size = 0;
}
/* Create avcC header */
codec_data = gst_structure_get_value (structure, "codec_data");
if (codec_data != NULL) {
guint8 *priv_data = NULL;
guint priv_data_size = 0;
GstBuffer *codec_data_buf = g_value_peek_pointer (codec_data);
priv_data_size = GST_BUFFER_SIZE (codec_data_buf);
priv_data = g_malloc0 (priv_data_size);
memcpy (priv_data, GST_BUFFER_DATA (codec_data_buf), priv_data_size);
context->codec_priv = priv_data;
context->codec_priv_size = priv_data_size;
}
return TRUE;
} else if (!strcmp (mimetype, "video/x-theora")) {
const GValue *streamheader;
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_VIDEO_THEORA);
if (context->codec_priv != NULL) {
g_free (context->codec_priv);
context->codec_priv = NULL;
context->codec_priv_size = 0;
}
streamheader = gst_structure_get_value (structure, "streamheader");
if (!theora_streamheader_to_codecdata (streamheader, context)) {
GST_ELEMENT_ERROR (mux, STREAM, MUX, (NULL),
("theora stream headers missing or malformed"));
return FALSE;
}
return TRUE;
} else if (!strcmp (mimetype, "video/mpeg")) {
gint mpegversion;
gst_structure_get_int (structure, "mpegversion", &mpegversion);
switch (mpegversion) {
case 1:
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_VIDEO_MPEG1);
break;
case 2:
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_VIDEO_MPEG2);
break;
case 4:
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_VIDEO_MPEG4_ASP);
break;
default:
return FALSE;
}
return TRUE;
} else if (!strcmp (mimetype, "video/x-msmpeg")) {
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_VIDEO_MSMPEG4V3);
return TRUE;
}
return FALSE;
}
static gboolean
xiph3_streamheader_to_codecdata (const GValue * streamheader,
GstMatroskaTrackContext * context, GstBuffer ** p_buf0)
{
GstBuffer *buf[3];
GArray *bufarr;
guint8 *priv_data;
guint i, offset, priv_data_size;
if (streamheader == NULL)
goto no_stream_headers;
if (G_VALUE_TYPE (streamheader) != GST_TYPE_ARRAY)
goto wrong_type;
bufarr = g_value_peek_pointer (streamheader);
if (bufarr->len != 3)
goto wrong_count;
context->xiph_headers_to_skip = bufarr->len;
for (i = 0; i < 3; i++) {
GValue *bufval = &g_array_index (bufarr, GValue, i);
if (G_VALUE_TYPE (bufval) != GST_TYPE_BUFFER)
goto wrong_content_type;
buf[i] = g_value_peek_pointer (bufval);
}
priv_data_size = 1;
priv_data_size += GST_BUFFER_SIZE (buf[0]) / 0xff + 1;
priv_data_size += GST_BUFFER_SIZE (buf[1]) / 0xff + 1;
for (i = 0; i < 3; ++i) {
priv_data_size += GST_BUFFER_SIZE (buf[i]);
}
priv_data = g_malloc0 (priv_data_size);
priv_data[0] = 2;
offset = 1;
for (i = 0; i < GST_BUFFER_SIZE (buf[0]) / 0xff; ++i) {
priv_data[offset++] = 0xff;
}
priv_data[offset++] = GST_BUFFER_SIZE (buf[0]) % 0xff;
for (i = 0; i < GST_BUFFER_SIZE (buf[1]) / 0xff; ++i) {
priv_data[offset++] = 0xff;
}
priv_data[offset++] = GST_BUFFER_SIZE (buf[1]) % 0xff;
for (i = 0; i < 3; ++i) {
memcpy (priv_data + offset, GST_BUFFER_DATA (buf[i]),
GST_BUFFER_SIZE (buf[i]));
offset += GST_BUFFER_SIZE (buf[i]);
}
context->codec_priv = priv_data;
context->codec_priv_size = priv_data_size;
if (p_buf0)
*p_buf0 = gst_buffer_ref (buf[0]);
return TRUE;
/* ERRORS */
no_stream_headers:
{
GST_WARNING ("required streamheaders missing in sink caps!");
return FALSE;
}
wrong_type:
{
GST_WARNING ("streamheaders are not a GST_TYPE_ARRAY, but a %s",
G_VALUE_TYPE_NAME (streamheader));
return FALSE;
}
wrong_count:
{
GST_WARNING ("got %u streamheaders, not 3 as expected", bufarr->len);
return FALSE;
}
wrong_content_type:
{
GST_WARNING ("streamheaders array does not contain GstBuffers");
return FALSE;
}
}
static gboolean
vorbis_streamheader_to_codecdata (const GValue * streamheader,
GstMatroskaTrackContext * context)
{
GstBuffer *buf0 = NULL;
if (!xiph3_streamheader_to_codecdata (streamheader, context, &buf0))
return FALSE;
if (buf0 == NULL || GST_BUFFER_SIZE (buf0) < 1 + 6 + 4) {
GST_WARNING ("First vorbis header too small, ignoring");
} else {
if (memcmp (GST_BUFFER_DATA (buf0) + 1, "vorbis", 6) == 0) {
GstMatroskaTrackAudioContext *audiocontext;
guint8 *hdr;
hdr = GST_BUFFER_DATA (buf0) + 1 + 6 + 4;
audiocontext = (GstMatroskaTrackAudioContext *) context;
audiocontext->channels = GST_READ_UINT8 (hdr);
audiocontext->samplerate = GST_READ_UINT32_LE (hdr + 1);
}
}
if (buf0)
gst_buffer_unref (buf0);
return TRUE;
}
static gboolean
theora_streamheader_to_codecdata (const GValue * streamheader,
GstMatroskaTrackContext * context)
{
GstBuffer *buf0 = NULL;
if (!xiph3_streamheader_to_codecdata (streamheader, context, &buf0))
return FALSE;
if (buf0 == NULL || GST_BUFFER_SIZE (buf0) < 1 + 6 + 26) {
GST_WARNING ("First theora header too small, ignoring");
} else if (memcmp (GST_BUFFER_DATA (buf0), "\200theora\003\002", 9) != 0) {
GST_WARNING ("First header not a theora identification header, ignoring");
} else {
GstMatroskaTrackVideoContext *videocontext;
guint fps_num, fps_denom, par_num, par_denom;
guint8 *hdr;
hdr = GST_BUFFER_DATA (buf0) + 1 + 6 + 3 + 2 + 2;
videocontext = (GstMatroskaTrackVideoContext *) context;
videocontext->pixel_width = GST_READ_UINT32_BE (hdr) >> 8;
videocontext->pixel_height = GST_READ_UINT32_BE (hdr + 3) >> 8;
hdr += 3 + 3 + 1 + 1;
fps_num = GST_READ_UINT32_BE (hdr);
fps_denom = GST_READ_UINT32_BE (hdr + 4);
context->default_duration = gst_util_uint64_scale_int (GST_SECOND,
fps_denom, fps_num);
hdr += 4 + 4;
par_num = GST_READ_UINT32_BE (hdr) >> 8;
par_denom = GST_READ_UINT32_BE (hdr + 3) >> 8;
if (par_num > 0 && par_num > 0) {
if (par_num > par_denom) {
videocontext->display_width =
videocontext->pixel_width * par_num / par_denom;
videocontext->display_height = videocontext->pixel_height;
} else if (par_num < par_denom) {
videocontext->display_width = videocontext->pixel_width;
videocontext->display_height =
videocontext->pixel_height * par_denom / par_num;
} else {
videocontext->display_width = 0;
videocontext->display_height = 0;
}
} else {
videocontext->display_width = 0;
videocontext->display_height = 0;
}
hdr += 3 + 3;
}
if (buf0)
gst_buffer_unref (buf0);
return TRUE;
}
/**
* gst_matroska_mux_audio_pad_setcaps:
* @pad: Pad which got the caps.
* @caps: New caps.
*
* Setcaps function for audio sink pad.
*
* Returns: #TRUE on success.
*/
static gboolean
gst_matroska_mux_audio_pad_setcaps (GstPad * pad, GstCaps * caps)
{
GstMatroskaTrackContext *context = NULL;
GstMatroskaTrackAudioContext *audiocontext;
GstMatroskaMux *mux;
GstMatroskaPad *collect_pad;
const gchar *mimetype;
gint samplerate = 0, channels = 0;
GstStructure *structure;
mux = GST_MATROSKA_MUX (GST_PAD_PARENT (pad));
/* find context */
collect_pad = (GstMatroskaPad *) gst_pad_get_element_private (pad);
g_assert (collect_pad);
context = collect_pad->track;
g_assert (context);
g_assert (context->type == GST_MATROSKA_TRACK_TYPE_AUDIO);
audiocontext = (GstMatroskaTrackAudioContext *) context;
structure = gst_caps_get_structure (caps, 0);
mimetype = gst_structure_get_name (structure);
/* general setup */
gst_structure_get_int (structure, "rate", &samplerate);
gst_structure_get_int (structure, "channels", &channels);
audiocontext->samplerate = samplerate;
audiocontext->channels = channels;
audiocontext->bitdepth = 0;
context->default_duration = 0;
if (!strcmp (mimetype, "audio/mpeg")) {
gint mpegversion = 0;
gst_structure_get_int (structure, "mpegversion", &mpegversion);
switch (mpegversion) {
case 1:{
gint layer;
gst_structure_get_int (structure, "layer", &layer);
switch (layer) {
case 1:
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_AUDIO_MPEG1_L1);
context->default_duration =
384 * GST_SECOND / audiocontext->samplerate;
break;
case 2:
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_AUDIO_MPEG1_L2);
context->default_duration =
1152 * GST_SECOND / audiocontext->samplerate;
break;
case 3:
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_AUDIO_MPEG1_L3);
context->default_duration =
1152 * GST_SECOND / audiocontext->samplerate;
break;
default:
return FALSE;
}
break;
}
case 2:
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_AUDIO_MPEG2 "MAIN");
break;
case 4:
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_AUDIO_MPEG4 "MAIN");
break;
default:
return FALSE;
}
return TRUE;
} else if (!strcmp (mimetype, "audio/x-raw-int")) {
gint endianness, width, depth;
gboolean signedness;
if (!gst_structure_get_int (structure, "endianness", &endianness) ||
!gst_structure_get_int (structure, "width", &width) ||
!gst_structure_get_int (structure, "depth", &depth) ||
!gst_structure_get_int (structure, "signed", &signedness))
return FALSE;
if (width != depth ||
(width == 8 && signedness) || (width == 16 && !signedness))
return FALSE;
audiocontext->bitdepth = depth;
if (endianness == G_BIG_ENDIAN)
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_AUDIO_PCM_INT_BE);
else
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_AUDIO_PCM_INT_LE);
return TRUE;
} else if (!strcmp (mimetype, "audio/x-raw-float")) {
/* FIXME: endianness is undefined */
} else if (!strcmp (mimetype, "audio/x-vorbis")) {
const GValue *streamheader;
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_AUDIO_VORBIS);
if (context->codec_priv != NULL) {
g_free (context->codec_priv);
context->codec_priv = NULL;
context->codec_priv_size = 0;
}
streamheader = gst_structure_get_value (structure, "streamheader");
if (!vorbis_streamheader_to_codecdata (streamheader, context)) {
GST_ELEMENT_ERROR (mux, STREAM, MUX, (NULL),
("vorbis stream headers missing or malformed"));
return FALSE;
}
return TRUE;
} else if (!strcmp (mimetype, "audio/x-ac3")) {
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_AUDIO_AC3);
return TRUE;
} else if (!strcmp (mimetype, "audio/x-tta")) {
gint width;
/* TTA frame duration */
context->default_duration = 1.04489795918367346939 * GST_SECOND;
gst_structure_get_int (structure, "width", &width);
audiocontext->bitdepth = width;
context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_AUDIO_TTA);
return TRUE;
}
return FALSE;
}
/**
* gst_matroska_mux_subtitle_pad_setcaps:
* @pad: Pad which got the caps.
* @caps: New caps.
*
* Setcaps function for subtitle sink pad.
*
* Returns: #TRUE on success.
*/
static gboolean
gst_matroska_mux_subtitle_pad_setcaps (GstPad * pad, GstCaps * caps)
{
/* Consider this as boilerplate code for now. There is
* no single subtitle creation element in GStreamer,
* neither do I know how subtitling works at all. */
return FALSE;
}
/**
* gst_matroska_mux_request_new_pad:
* @element: #GstMatroskaMux.
* @templ: #GstPadTemplate.
* @pad_name: New pad name.
*
* Request pad function for sink templates.
*
* Returns: New #GstPad.
*/
static GstPad *
gst_matroska_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * pad_name)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
GstMatroskaMux *mux = GST_MATROSKA_MUX (element);
GstMatroskaPad *collect_pad;
GstPad *newpad = NULL;
gchar *name = NULL;
GstPadSetCapsFunction setcapsfunc = NULL;
GstMatroskaTrackContext *context = NULL;
if (templ == gst_element_class_get_pad_template (klass, "audio_%d")) {
name = g_strdup_printf ("audio_%d", mux->num_a_streams++);
setcapsfunc = gst_matroska_mux_audio_pad_setcaps;
context = (GstMatroskaTrackContext *)
g_new0 (GstMatroskaTrackAudioContext, 1);
context->type = GST_MATROSKA_TRACK_TYPE_AUDIO;
context->name = g_strdup ("Audio");
} else if (templ == gst_element_class_get_pad_template (klass, "video_%d")) {
name = g_strdup_printf ("video_%d", mux->num_v_streams++);
setcapsfunc = gst_matroska_mux_video_pad_setcaps;
context = (GstMatroskaTrackContext *)
g_new0 (GstMatroskaTrackVideoContext, 1);
context->type = GST_MATROSKA_TRACK_TYPE_VIDEO;
context->name = g_strdup ("Video");
} else if (templ == gst_element_class_get_pad_template (klass, "subtitle_%d")) {
name = g_strdup_printf ("subtitle_%d", mux->num_t_streams++);
setcapsfunc = gst_matroska_mux_subtitle_pad_setcaps;
context = (GstMatroskaTrackContext *)
g_new0 (GstMatroskaTrackSubtitleContext, 1);
context->type = GST_MATROSKA_TRACK_TYPE_SUBTITLE;
context->name = g_strdup ("Subtitle");
} else {
GST_WARNING_OBJECT (mux, "This is not our template!");
return NULL;
}
newpad = gst_pad_new_from_template (templ, name);
g_free (name);
collect_pad = (GstMatroskaPad *)
gst_collect_pads_add_pad (mux->collect, newpad, sizeof (GstMatroskaPad));
context->flags = GST_MATROSKA_TRACK_ENABLED | GST_MATROSKA_TRACK_DEFAULT;
collect_pad->track = context;
collect_pad->buffer = NULL;
gst_pad_set_setcaps_function (newpad, setcapsfunc);
gst_element_add_pad (element, newpad);
return newpad;
}
/**
* gst_matroska_mux_track_header:
* @mux: #GstMatroskaMux
* @context: Tack context.
*
* Write a track header.
*/
static void
gst_matroska_mux_track_header (GstMatroskaMux * mux,
GstMatroskaTrackContext * context)
{
GstEbmlWrite *ebml = mux->ebml_write;
guint64 master;
/* track type goes before the type-specific stuff */
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_TRACKNUMBER, context->num);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_TRACKTYPE, context->type);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_TRACKUID,
gst_matroska_mux_create_uid ());
if (context->default_duration) {
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_TRACKDEFAULTDURATION,
context->default_duration);
}
/* type-specific stuff */
switch (context->type) {
case GST_MATROSKA_TRACK_TYPE_VIDEO:{
GstMatroskaTrackVideoContext *videocontext =
(GstMatroskaTrackVideoContext *) context;
master = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TRACKVIDEO);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_VIDEOPIXELWIDTH,
videocontext->pixel_width);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_VIDEOPIXELHEIGHT,
videocontext->pixel_height);
if (videocontext->display_width && videocontext->display_height) {
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_VIDEODISPLAYWIDTH,
videocontext->display_width);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_VIDEODISPLAYHEIGHT,
videocontext->display_height);
}
if (context->flags & GST_MATROSKA_VIDEOTRACK_INTERLACED)
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_VIDEOFLAGINTERLACED, 1);
if (videocontext->fourcc) {
guint32 fcc_le = GUINT32_TO_LE (videocontext->fourcc);
gst_ebml_write_binary (ebml, GST_MATROSKA_ID_VIDEOCOLOURSPACE,
(gpointer) & fcc_le, 4);
}
gst_ebml_write_master_finish (ebml, master);
break;
}
case GST_MATROSKA_TRACK_TYPE_AUDIO:{
GstMatroskaTrackAudioContext *audiocontext =
(GstMatroskaTrackAudioContext *) context;
master = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TRACKAUDIO);
if (audiocontext->samplerate != 8000)
gst_ebml_write_float (ebml, GST_MATROSKA_ID_AUDIOSAMPLINGFREQ,
audiocontext->samplerate);
if (audiocontext->channels != 1)
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_AUDIOCHANNELS,
audiocontext->channels);
if (audiocontext->bitdepth) {
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_AUDIOBITDEPTH,
audiocontext->bitdepth);
}
gst_ebml_write_master_finish (ebml, master);
break;
}
default:
/* doesn't need type-specific data */
break;
}
gst_ebml_write_ascii (ebml, GST_MATROSKA_ID_CODECID, context->codec_id);
if (context->codec_priv)
gst_ebml_write_binary (ebml, GST_MATROSKA_ID_CODECPRIVATE,
context->codec_priv, context->codec_priv_size);
/* FIXME: until we have a nice way of getting the codecname
* out of the caps, I'm not going to enable this. Too much
* (useless, double, boring) work... */
/*gst_ebml_write_utf8 (ebml, GST_MATROSKA_ID_CODECNAME,
context->codec_name); */
gst_ebml_write_utf8 (ebml, GST_MATROSKA_ID_TRACKNAME, context->name);
}
/**
* gst_matroska_mux_start:
* @mux: #GstMatroskaMux
*
* Start a new matroska file (write headers etc...)
*/
static void
gst_matroska_mux_start (GstMatroskaMux * mux)
{
GstEbmlWrite *ebml = mux->ebml_write;
guint32 seekhead_id[] = { GST_MATROSKA_ID_INFO,
GST_MATROSKA_ID_TRACKS,
GST_MATROSKA_ID_CUES,
GST_MATROSKA_ID_SEEKHEAD,
#if 0
GST_MATROSKA_ID_TAGS,
#endif
0
};
guint64 master, child;
GSList *collected;
int i;
guint tracknum = 1;
gdouble duration = 0;
guint32 *segment_uid = (guint32 *) g_malloc (16);
GRand *rand = g_rand_new ();
GTimeVal time = { 0, 0 };
/* we start with a EBML header */
gst_ebml_write_header (ebml, "matroska", mux->matroska_version);
/* start a segment */
mux->segment_pos =
gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_SEGMENT);
mux->segment_master = ebml->pos;
/* the rest of the header is cached */
gst_ebml_write_set_cache (ebml, 0x1000);
/* seekhead (table of contents) - we set the positions later */
mux->seekhead_pos = ebml->pos;
master = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_SEEKHEAD);
for (i = 0; seekhead_id[i] != 0; i++) {
child = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_SEEKENTRY);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_SEEKID, seekhead_id[i]);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_SEEKPOSITION, -1);
gst_ebml_write_master_finish (ebml, child);
}
gst_ebml_write_master_finish (ebml, master);
/* segment info */
mux->info_pos = ebml->pos;
master = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_INFO);
for (i = 0; i < 4; i++) {
segment_uid[i] = g_rand_int (rand);
}
g_free (rand);
gst_ebml_write_binary (ebml, GST_MATROSKA_ID_SEGMENTUID,
(guint8 *) segment_uid, 16);
g_free (segment_uid);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_TIMECODESCALE, mux->time_scale);
mux->duration_pos = ebml->pos;
/* get duration */
for (collected = mux->collect->data; collected;
collected = g_slist_next (collected)) {
GstMatroskaPad *collect_pad;
GstFormat format = GST_FORMAT_TIME;
GstPad *thepad, *peerpad;
gint64 trackduration;
collect_pad = (GstMatroskaPad *) collected->data;
thepad = collect_pad->collect.pad;
/* Query the total length of the track. */
peerpad = gst_pad_get_peer (thepad);
GST_DEBUG_OBJECT (thepad, "querying duration");
if (gst_pad_query_duration (peerpad, &format, &trackduration)) {
GST_DEBUG_OBJECT (thepad, "%duration: %" GST_TIME_FORMAT,
GST_TIME_ARGS (trackduration));
if ((gdouble) trackduration > duration) {
duration = (gdouble) trackduration;
}
}
gst_object_unref (peerpad);
}
gst_ebml_write_float (ebml, GST_MATROSKA_ID_DURATION,
duration / gst_guint64_to_gdouble (mux->time_scale));
gst_ebml_write_utf8 (ebml, GST_MATROSKA_ID_MUXINGAPP,
"GStreamer plugin version " PACKAGE_VERSION);
if (mux->writing_app && mux->writing_app[0]) {
gst_ebml_write_utf8 (ebml, GST_MATROSKA_ID_WRITINGAPP, mux->writing_app);
}
g_get_current_time (&time);
gst_ebml_write_date (ebml, GST_MATROSKA_ID_DATEUTC, time.tv_sec);
gst_ebml_write_master_finish (ebml, master);
/* tracks */
mux->tracks_pos = ebml->pos;
master = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TRACKS);
for (collected = mux->collect->data; collected;
collected = g_slist_next (collected)) {
GstMatroskaPad *collect_pad;
GstPad *thepad;
collect_pad = (GstMatroskaPad *) collected->data;
thepad = collect_pad->collect.pad;
if (gst_pad_is_linked (thepad) && gst_pad_is_active (thepad) &&
collect_pad->track->codec_id != 0) {
collect_pad->track->num = tracknum++;
child = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TRACKENTRY);
gst_matroska_mux_track_header (mux, collect_pad->track);
gst_ebml_write_master_finish (ebml, child);
}
}
gst_ebml_write_master_finish (ebml, master);
/* lastly, flush the cache */
gst_ebml_write_flush_cache (ebml);
}
/**
* gst_matroska_mux_finish:
* @mux: #GstMatroskaMux
*
* Finish a new matroska file (write index etc...)
*/
static void
gst_matroska_mux_finish (GstMatroskaMux * mux)
{
GstEbmlWrite *ebml = mux->ebml_write;
guint64 pos;
guint64 duration = 0;
GSList *collected;
/* finish last cluster */
if (mux->cluster) {
gst_ebml_write_master_finish (ebml, mux->cluster);
}
/* cues */
if (mux->index != NULL) {
guint n;
guint64 master, pointentry_master, trackpos_master;
mux->cues_pos = ebml->pos;
gst_ebml_write_set_cache (ebml, 12 + 41 * mux->num_indexes);
master = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_CUES);
for (n = 0; n < mux->num_indexes; n++) {
GstMatroskaIndex *idx = &mux->index[n];
pointentry_master = gst_ebml_write_master_start (ebml,
GST_MATROSKA_ID_POINTENTRY);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_CUETIME,
idx->time / mux->time_scale);
trackpos_master = gst_ebml_write_master_start (ebml,
GST_MATROSKA_ID_CUETRACKPOSITION);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_CUETRACK, idx->track);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_CUECLUSTERPOSITION,
idx->pos - mux->segment_master);
gst_ebml_write_master_finish (ebml, trackpos_master);
gst_ebml_write_master_finish (ebml, pointentry_master);
}
gst_ebml_write_master_finish (ebml, master);
gst_ebml_write_flush_cache (ebml);
}
if (mux->meta_index != NULL) {
guint n;
guint64 master, seekentry_master;
mux->meta_pos = ebml->pos;
gst_ebml_write_set_cache (ebml, 12 + 28 * mux->num_meta_indexes);
master = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_SEEKHEAD);
for (n = 0; n < mux->num_meta_indexes; n++) {
GstMatroskaMetaSeekIndex *idx = &mux->meta_index[n];
seekentry_master = gst_ebml_write_master_start (ebml,
GST_MATROSKA_ID_SEEKENTRY);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_SEEKID, idx->id);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_SEEKPOSITION,
idx->pos - mux->segment_master);
gst_ebml_write_master_finish (ebml, seekentry_master);
}
gst_ebml_write_master_finish (ebml, master);
}
gst_ebml_write_flush_cache (ebml);
/* FIXME: tags */
/* update seekhead. We know that:
* - a seekhead contains 4 entries.
* - order of entries is as above.
* - a seekhead has a 4-byte header + 8-byte length
* - each entry is 2-byte master, 2-byte ID pointer,
* 2-byte length pointer, all 8/1-byte length, 4-
* byte ID and 8-byte length pointer, where the
* length pointer starts at 20.
* - all entries are local to the segment (so pos - segment_master).
* - so each entry is at 12 + 20 + num * 28. */
gst_ebml_replace_uint (ebml, mux->seekhead_pos + 32,
mux->info_pos - mux->segment_master);
gst_ebml_replace_uint (ebml, mux->seekhead_pos + 60,
mux->tracks_pos - mux->segment_master);
if (mux->index != NULL) {
gst_ebml_replace_uint (ebml, mux->seekhead_pos + 88,
mux->cues_pos - mux->segment_master);
} else {
/* void'ify */
guint64 my_pos = ebml->pos;
gst_ebml_write_seek (ebml, mux->seekhead_pos + 68);
gst_ebml_write_buffer_header (ebml, GST_EBML_ID_VOID, 26);
gst_ebml_write_seek (ebml, my_pos);
}
if (mux->meta_index != NULL) {
gst_ebml_replace_uint (ebml, mux->seekhead_pos + 116,
mux->meta_pos - mux->segment_master);
} else {
/* void'ify */
guint64 my_pos = ebml->pos;
gst_ebml_write_seek (ebml, mux->seekhead_pos + 96);
gst_ebml_write_buffer_header (ebml, GST_EBML_ID_VOID, 26);
gst_ebml_write_seek (ebml, my_pos);
}
#if 0
gst_ebml_replace_uint (ebml, mux->seekhead_pos + 116,
mux->tags_pos - mux->segment_master);
#endif
/* update duration */
/* first get the overall duration */
for (collected = mux->collect->data; collected;
collected = g_slist_next (collected)) {
GstMatroskaPad *collect_pad;
collect_pad = (GstMatroskaPad *) collected->data;
if (collect_pad->duration > duration)
duration = collect_pad->duration;
}
if (duration != 0) {
pos = mux->ebml_write->pos;
gst_ebml_write_seek (ebml, mux->duration_pos);
gst_ebml_write_float (ebml, GST_MATROSKA_ID_DURATION,
gst_guint64_to_gdouble (duration / mux->time_scale));
gst_ebml_write_seek (ebml, pos);
}
/* finish segment - this also writes element length */
gst_ebml_write_master_finish (ebml, mux->segment_pos);
}
/**
* gst_matroska_mux_best_pad:
* @mux: #GstMatroskaMux
* @popped: True if at least one buffer was popped from #GstCollectPads
*
* Find a pad with the oldest data
* (data from this pad should be written first).
*
* Returns: Selected pad.
*/
static GstMatroskaPad *
gst_matroska_mux_best_pad (GstMatroskaMux * mux, gboolean * popped)
{
GSList *collected;
GstMatroskaPad *best = NULL;
*popped = FALSE;
for (collected = mux->collect->data; collected;
collected = g_slist_next (collected)) {
GstMatroskaPad *collect_pad;
collect_pad = (GstMatroskaPad *) collected->data;
/* fetch a new buffer if needed */
if (collect_pad->buffer == NULL) {
collect_pad->buffer = gst_collect_pads_pop (mux->collect,
(GstCollectData *) collect_pad);
if (collect_pad->buffer != NULL)
*popped = TRUE;
}
/* if we have a buffer check if it is better then the current best one */
if (collect_pad->buffer != NULL) {
if (best == NULL || !GST_BUFFER_TIMESTAMP_IS_VALID (collect_pad->buffer)
|| (GST_BUFFER_TIMESTAMP_IS_VALID (best->buffer)
&& GST_BUFFER_TIMESTAMP (collect_pad->buffer) <
GST_BUFFER_TIMESTAMP (best->buffer))) {
best = collect_pad;
}
}
}
return best;
}
/**
* gst_matroska_mux_buffer_header:
* @track: Track context.
* @relative_timestamp: relative timestamp of the buffer
* @flags: Buffer flags.
*
* Create a buffer containing buffer header.
*
* Returns: New buffer.
*/
GstBuffer *
gst_matroska_mux_create_buffer_header (GstMatroskaTrackContext * track,
gint16 relative_timestamp, int flags)
{
GstBuffer *hdr;
hdr = gst_buffer_new_and_alloc (4);
/* track num - FIXME: what if num >= 0x80 (unlikely)? */
GST_BUFFER_DATA (hdr)[0] = track->num | 0x80;
/* time relative to clustertime */
GST_WRITE_UINT16_BE (GST_BUFFER_DATA (hdr) + 1, relative_timestamp);
/* flags */
GST_BUFFER_DATA (hdr)[3] = flags;
return hdr;
}
/**
* gst_matroska_mux_write_data:
* @mux: #GstMatroskaMux
* @collect_pad: #GstMatroskaPad with the data
*
* Write collected data (called from gst_matroska_mux_collected).
*
* Returns: Result of the gst_pad_push issued to write the data.
*/
static GstFlowReturn
gst_matroska_mux_write_data (GstMatroskaMux * mux, GstMatroskaPad * collect_pad)
{
GstEbmlWrite *ebml = mux->ebml_write;
GstBuffer *buf, *hdr;
guint64 cluster, blockgroup;
gboolean write_duration;
gint16 relative_timestamp;
gint64 relative_timestamp64;
guint64 block_duration;
gboolean is_video_keyframe = FALSE;
/* write data */
buf = collect_pad->buffer;
collect_pad->buffer = NULL;
/* vorbis/theora headers are retrieved from caps and put in CodecPrivate */
if (collect_pad->track->xiph_headers_to_skip > 0) {
GST_LOG_OBJECT (collect_pad->collect.pad, "dropping streamheader buffer");
gst_buffer_unref (buf);
--collect_pad->track->xiph_headers_to_skip;
return GST_FLOW_OK;
}
/* hm, invalid timestamp (due to --to be fixed--- element upstream);
* this would wreak havoc with time stored in matroska file */
if (!GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
GST_WARNING_OBJECT (collect_pad->collect.pad,
"Invalid buffer timestamp; dropping buffer");
gst_buffer_unref (buf);
return GST_FLOW_OK;
}
/* set the timestamp for outgoing buffers */
ebml->timestamp = GST_BUFFER_TIMESTAMP (buf);
if (collect_pad->track->type == GST_MATROSKA_TRACK_TYPE_VIDEO &&
!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
GST_LOG_OBJECT (mux, "have video keyframe, ts=%" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
is_video_keyframe = TRUE;
}
if (mux->cluster) {
/* start a new cluster every two seconds or at keyframe */
if (mux->cluster_time + GST_SECOND * 2 < GST_BUFFER_TIMESTAMP (buf)
|| is_video_keyframe) {
GstMatroskaMetaSeekIndex *idx;
gst_ebml_write_master_finish (ebml, mux->cluster);
mux->cluster_pos = ebml->pos;
mux->cluster =
gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_CLUSTER);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_CLUSTERTIMECODE,
GST_BUFFER_TIMESTAMP (buf) / mux->time_scale);
mux->cluster_time = GST_BUFFER_TIMESTAMP (buf);
if (mux->num_meta_indexes % 32 == 0) {
mux->meta_index = g_renew (GstMatroskaMetaSeekIndex, mux->meta_index,
mux->num_meta_indexes + 32);
}
idx = &mux->meta_index[mux->num_meta_indexes++];
idx->id = GST_MATROSKA_ID_CLUSTER;
idx->pos = mux->cluster_pos;
}
} else {
/* first cluster */
GstMatroskaMetaSeekIndex *idx;
mux->cluster_pos = ebml->pos;
mux->cluster = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_CLUSTER);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_CLUSTERTIMECODE,
GST_BUFFER_TIMESTAMP (buf) / mux->time_scale);
mux->cluster_time = GST_BUFFER_TIMESTAMP (buf);
if (mux->num_meta_indexes % 32 == 0) {
mux->meta_index = g_renew (GstMatroskaMetaSeekIndex, mux->meta_index,
mux->num_meta_indexes + 32);
}
idx = &mux->meta_index[mux->num_meta_indexes++];
idx->id = GST_MATROSKA_ID_CLUSTER;
idx->pos = mux->cluster_pos;
}
cluster = mux->cluster;
/* update duration of this track */
if (GST_BUFFER_DURATION_IS_VALID (buf))
collect_pad->duration += GST_BUFFER_DURATION (buf);
/* We currently write an index entry for each keyframe in a
* video track or one entry for each cluster in an audio track
* for audio only files. This can be largely improved, such as doing
* one for each keyframe or each second (for all-keyframe
* streams), only the *first* video track. But that'll come later... */
if (is_video_keyframe) {
GstMatroskaIndex *idx;
if (mux->num_indexes % 32 == 0) {
mux->index = g_renew (GstMatroskaIndex, mux->index,
mux->num_indexes + 32);
}
idx = &mux->index[mux->num_indexes++];
idx->pos = mux->cluster_pos;
idx->time = GST_BUFFER_TIMESTAMP (buf);
idx->track = collect_pad->track->num;
} else if ((collect_pad->track->type == GST_MATROSKA_TRACK_TYPE_AUDIO) &&
(mux->num_streams == 1)) {
GstMatroskaIndex *idx;
if (mux->num_indexes % 32 == 0) {
mux->index = g_renew (GstMatroskaIndex, mux->index,
mux->num_indexes + 32);
}
idx = &mux->index[mux->num_indexes++];
idx->pos = mux->cluster_pos;
idx->time = GST_BUFFER_TIMESTAMP (buf);
idx->track = collect_pad->track->num;
}
/* Check if the duration differs from the default duration. */
write_duration = FALSE;
block_duration = GST_BUFFER_DURATION (buf);
if (GST_BUFFER_DURATION_IS_VALID (buf)) {
if (block_duration != collect_pad->track->default_duration) {
write_duration = TRUE;
}
}
/* write the block, for matroska v2 use SimpleBlock if possible
* one slice (*breath*).
* FIXME: lacing, etc. */
relative_timestamp64 = GST_BUFFER_TIMESTAMP (buf) - mux->cluster_time;
if (relative_timestamp64 >= 0) {
/* round the timestamp */
relative_timestamp64 += mux->time_scale / 2;
} else {
/* round the timestamp */
relative_timestamp64 -= mux->time_scale / 2;
}
relative_timestamp = relative_timestamp64 / (gint64) mux->time_scale;
if (mux->matroska_version > 1 && !write_duration) {
int flags =
GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT) ? 0 : 0x80;
hdr =
gst_matroska_mux_create_buffer_header (collect_pad->track,
relative_timestamp, flags);
gst_ebml_write_buffer_header (ebml, GST_MATROSKA_ID_SIMPLEBLOCK,
GST_BUFFER_SIZE (buf) + GST_BUFFER_SIZE (hdr));
gst_ebml_write_buffer (ebml, hdr);
gst_ebml_write_buffer (ebml, buf);
return gst_ebml_last_write_result (ebml);
} else {
blockgroup = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_BLOCKGROUP);
hdr =
gst_matroska_mux_create_buffer_header (collect_pad->track,
relative_timestamp, 0);
gst_ebml_write_buffer_header (ebml, GST_MATROSKA_ID_BLOCK,
GST_BUFFER_SIZE (buf) + GST_BUFFER_SIZE (hdr));
gst_ebml_write_buffer (ebml, hdr);
gst_ebml_write_buffer (ebml, buf);
if (write_duration) {
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_BLOCKDURATION,
block_duration / mux->time_scale);
}
gst_ebml_write_master_finish (ebml, blockgroup);
return gst_ebml_last_write_result (ebml);
}
}
/**
* gst_matroska_mux_collected:
* @pads: #GstCollectPads
* @uuser_data: #GstMatroskaMux
*
* Collectpads callback.
*
* Returns: #GstFlowReturn
*/
static GstFlowReturn
gst_matroska_mux_collected (GstCollectPads * pads, gpointer user_data)
{
GstMatroskaMux *mux = GST_MATROSKA_MUX (user_data);
GstMatroskaPad *best;
gboolean popped;
GstFlowReturn ret;
GST_DEBUG_OBJECT (mux, "Collected pads");
/* start with a header */
if (mux->state == GST_MATROSKA_MUX_STATE_START) {
if (mux->collect->data == NULL) {
GST_ELEMENT_ERROR (mux, STREAM, MUX, (NULL),
("No input streams configured"));
return GST_FLOW_ERROR;
}
mux->state = GST_MATROSKA_MUX_STATE_HEADER;
gst_matroska_mux_start (mux);
mux->state = GST_MATROSKA_MUX_STATE_DATA;
}
do {
/* which stream to write from? */
best = gst_matroska_mux_best_pad (mux, &popped);
/* if there is no best pad, we have reached EOS */
if (best == NULL) {
GST_DEBUG_OBJECT (mux, "No best pad finishing...");
gst_matroska_mux_finish (mux);
gst_pad_push_event (mux->srcpad, gst_event_new_eos ());
ret = GST_FLOW_UNEXPECTED;
break;
}
GST_DEBUG_OBJECT (best->collect.pad, "best pad");
/* write one buffer */
ret = gst_matroska_mux_write_data (mux, best);
} while (ret == GST_FLOW_OK && !popped);
return ret;
}
/**
* gst_matroska_mux_change_state:
* @element: #GstMatroskaMux
* @transition: State change transition.
*
* Change the muxer state.
*
* Returns: #GstStateChangeReturn
*/
static GstStateChangeReturn
gst_matroska_mux_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstMatroskaMux *mux = GST_MATROSKA_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_matroska_mux_reset (GST_ELEMENT (mux));
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static void
gst_matroska_mux_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstMatroskaMux *mux;
g_return_if_fail (GST_IS_MATROSKA_MUX (object));
mux = GST_MATROSKA_MUX (object);
switch (prop_id) {
case ARG_WRITING_APP:
if (!g_value_get_string (value)) {
GST_WARNING_OBJECT (mux, "writing-app property can not be NULL");
break;
}
g_free (mux->writing_app);
mux->writing_app = g_strdup (g_value_get_string (value));
break;
case ARG_MATROSKA_VERSION:
mux->matroska_version = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_matroska_mux_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstMatroskaMux *mux;
g_return_if_fail (GST_IS_MATROSKA_MUX (object));
mux = GST_MATROSKA_MUX (object);
switch (prop_id) {
case ARG_WRITING_APP:
g_value_set_string (value, mux->writing_app);
break;
case ARG_MATROSKA_VERSION:
g_value_set_int (value, mux->matroska_version);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
gboolean
gst_matroska_mux_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "matroskamux",
GST_RANK_NONE, GST_TYPE_MATROSKA_MUX);
}
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