/* GStreamer Matroska muxer/demuxer * (c) 2003 Ronald Bultje * (c) 2005 Michal Benes * * 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 #include #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 ]" #define COMMON_VIDEO_CAPS_NO_FRAMERATE \ "width = (int) [ 16, 4096 ], " \ "height = (int) [ 16, 4096 ] " 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_NO_FRAMERATE "; " "video/x-theora; " "video/x-dirac, " COMMON_VIDEO_CAPS "; " "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, " "depth = (int) 8, " "signed = (boolean) false, " COMMON_AUDIO_CAPS ";" "audio/x-raw-int, " "width = (int) 16, " "depth = (int) 16, " "endianness = (int) { BIG_ENDIAN, LITTLE_ENDIAN }, " "signed = (boolean) true, " 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; static void gst_matroska_mux_add_interfaces (GType type); GST_BOILERPLATE_FULL (GstMatroskaMux, gst_matroska_mux, GstElement, GST_TYPE_ELEMENT, gst_matroska_mux_add_interfaces); /* 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); static void gst_matroska_mux_release_pad (GstElement * element, GstPad * pad); /* 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_add_interfaces (GType type) { static const GInterfaceInfo tag_setter_info = { NULL, NULL, NULL }; g_type_add_interface_static (type, GST_TYPE_TAG_SETTER, &tag_setter_info); } 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 "); 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_DEBUG_FUNCPTR (gst_matroska_mux_change_state); gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR (gst_matroska_mux_request_new_pad); gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_matroska_mux_release_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_pad_free: * @collect_pad: the #GstMatroskaPad * * Release resources of a matroska collect pad. */ static void gst_matroska_pad_free (GstMatroskaPad * 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; } } /** * 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 collect pad resources */ gst_matroska_pad_free (collect_pad); /* 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; /* reset tags */ if (mux->tags) { gst_tag_list_free (mux->tags); mux->tags = 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_handle_sink_event: * @pad: Pad which received the event. * @event: Received event. * * handle events - informational ones like tags * * Returns: #TRUE on success. */ static gboolean gst_matroska_mux_handle_sink_event (GstPad * pad, GstEvent * event) { GstMatroskaTrackContext *context; GstMatroskaPad *collect_pad; GstMatroskaMux *mux; GstTagList *list; gboolean ret; mux = GST_MATROSKA_MUX (gst_pad_get_parent (pad)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_TAG: gst_event_parse_tag (event, &list); collect_pad = (GstMatroskaPad *) gst_pad_get_element_private (pad); g_assert (collect_pad); context = collect_pad->track; g_assert (context); /* FIXME ? * strictly speaking, the incoming language code may only be 639-1, so not * 639-2 according to matroska specs, but it will have to do for now */ gst_tag_list_get_string (list, GST_TAG_LANGUAGE_CODE, &context->language); if (mux->tags) { gst_tag_list_insert (mux->tags, list, GST_TAG_MERGE_PREPEND); } else { mux->tags = gst_tag_list_copy (list); } break; default: break; } /* now GstCollectPads can take care of the rest, e.g. EOS */ ret = mux->collect_event (pad, event); gst_object_unref (mux); return ret; } /** * 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; GstStructure *structure; const gchar *mimetype; gint width, height, pixel_width, pixel_height; gint fps_d, fps_n; 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); videocontext->pixel_width = width; videocontext->pixel_height = height; if (gst_structure_get_fraction (structure, "framerate", &fps_n, &fps_d)) { context->default_duration = gst_util_uint64_scale_int (GST_SECOND, fps_d, fps_n); GST_LOG_OBJECT (pad, "default duration = %" GST_TIME_FORMAT, GST_TIME_ARGS (context->default_duration)); } else { context->default_duration = 0; } 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/x-dirac")) { context->codec_id = g_strdup (GST_MATROSKA_CODEC_ID_VIDEO_DIRAC); 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, "width", &width) || !gst_structure_get_int (structure, "depth", &depth) || !gst_structure_get_boolean (structure, "signed", &signedness)) { GST_DEBUG_OBJECT (mux, "broken caps, width/depth/signed field missing"); return FALSE; } if (depth > 8 && !gst_structure_get_int (structure, "endianness", &endianness)) { GST_DEBUG_OBJECT (mux, "broken caps, no endianness specified"); return FALSE; } if (width != depth) { GST_DEBUG_OBJECT (mux, "width must be same as depth!"); return FALSE; } /* where is this spec'ed out? (tpm) */ if ((width == 8 && signedness) || (width == 16 && !signedness)) { GST_DEBUG_OBJECT (mux, "8-bit PCM must be unsigned, 16-bit PCM signed"); 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; collect_pad->start_ts = GST_CLOCK_TIME_NONE; collect_pad->end_ts = GST_CLOCK_TIME_NONE; /* 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. * TODO GstCollectPads should really give its 'users' a clean chance to * properly handle events that are not meant for collectpads itself. * Perhaps a callback or so, though rejected (?) in #340060. * This would allow (clean) transcoding of info from demuxer/streams * to another muxer */ mux->collect_event = (GstPadEventFunction) GST_PAD_EVENTFUNC (newpad); gst_pad_set_event_function (newpad, GST_DEBUG_FUNCPTR (gst_matroska_mux_handle_sink_event)); gst_pad_set_setcaps_function (newpad, setcapsfunc); gst_pad_set_active (newpad, TRUE); gst_element_add_pad (element, newpad); return newpad; } /** * gst_matroska_mux_release_pad: * @element: #GstMatroskaMux. * @pad: Pad to release. * * Release a previously requested pad. */ static void gst_matroska_mux_release_pad (GstElement * element, GstPad * pad) { GstMatroskaMux *mux; GSList *walk; mux = GST_MATROSKA_MUX (GST_PAD_PARENT (pad)); for (walk = mux->collect->data; walk; walk = g_slist_next (walk)) { GstCollectData *cdata = (GstCollectData *) walk->data; GstMatroskaPad *collect_pad = (GstMatroskaPad *) cdata; if (cdata->pad == pad) { GstClockTime min_dur; /* observed minimum duration */ /* no need to check if start_ts and end_ts are set, in the worst case * they're both -1 and we'll end up with a duration of 0 again */ min_dur = GST_CLOCK_DIFF (collect_pad->start_ts, collect_pad->end_ts); if (collect_pad->duration < min_dur) collect_pad->duration = min_dur; if (collect_pad->duration > mux->duration) mux->duration = collect_pad->duration; gst_matroska_pad_free (collect_pad); gst_collect_pads_remove_pad (mux->collect, pad); gst_element_remove_pad (element, pad); return; } } g_warning ("%s: unknown pad %s", GST_FUNCTION, GST_PAD_NAME (pad)); } /** * 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); } if (context->language) { gst_ebml_write_utf8 (ebml, GST_MATROSKA_ID_TRACKLANGUAGE, context->language); } /* 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, GST_MATROSKA_ID_TAGS, 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; gint64 trackduration; collect_pad = (GstMatroskaPad *) collected->data; thepad = collect_pad->collect.pad; /* Query the total length of the track. */ GST_DEBUG_OBJECT (thepad, "querying peer duration"); if (gst_pad_query_peer_duration (thepad, &format, &trackduration)) { GST_DEBUG_OBJECT (thepad, "duration: %" GST_TIME_FORMAT, GST_TIME_ARGS (trackduration)); if (trackduration != GST_CLOCK_TIME_NONE && (gdouble) trackduration > duration) { duration = (gdouble) trackduration; } } } 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); } static void gst_matroska_mux_write_simple_tag (const GstTagList * list, const gchar * tag, gpointer data) { struct { gchar *matroska_tagname; gchar *gstreamer_tagname; } tag_conv[] = { { GST_MATROSKA_TAG_ID_TITLE, GST_TAG_TITLE}, { GST_MATROSKA_TAG_ID_AUTHOR, GST_TAG_ARTIST}, { GST_MATROSKA_TAG_ID_ALBUM, GST_TAG_ALBUM}, { GST_MATROSKA_TAG_ID_COMMENTS, GST_TAG_COMMENT}, { GST_MATROSKA_TAG_ID_BITSPS, GST_TAG_BITRATE}, { GST_MATROSKA_TAG_ID_DATE, GST_TAG_DATE}, { GST_MATROSKA_TAG_ID_ISRC, GST_TAG_ISRC}, { GST_MATROSKA_TAG_ID_COPYRIGHT, GST_TAG_COPYRIGHT} }; GstEbmlWrite *ebml = (GstEbmlWrite *) data; guint i; guint64 simpletag_master; for (i = 0; i < G_N_ELEMENTS (tag_conv); i++) { const gchar *tagname_gst = tag_conv[i].gstreamer_tagname; const gchar *tagname_mkv = tag_conv[i].matroska_tagname; if (strcmp (tagname_gst, tag) == 0) { GValue src = { 0, }; GValue dest = { 0, }; if (!gst_tag_list_copy_value (&src, list, tag)) break; g_value_init (&dest, G_TYPE_STRING); g_value_transform (&src, &dest); g_value_unset (&src); simpletag_master = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_SIMPLETAG); gst_ebml_write_ascii (ebml, GST_MATROSKA_ID_TAGNAME, tagname_mkv); gst_ebml_write_utf8 (ebml, GST_MATROSKA_ID_TAGSTRING, g_value_get_string (&dest)); gst_ebml_write_master_finish (ebml, simpletag_master); g_value_unset (&dest); break; } } } /** * 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; GstTagList *tags; /* 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); /* tags */ tags = gst_tag_list_merge (gst_tag_setter_get_tag_list (GST_TAG_SETTER (mux)), mux->tags, GST_TAG_MERGE_APPEND); if (tags != NULL) { guint64 master_tags, master_tag; mux->tags_pos = ebml->pos; master_tags = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TAGS); master_tag = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TAG); gst_tag_list_foreach (tags, gst_matroska_mux_write_simple_tag, ebml); gst_ebml_write_master_finish (ebml, master_tag); gst_ebml_write_master_finish (ebml, master_tags); gst_tag_list_free (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 (tags != NULL) { gst_ebml_replace_uint (ebml, mux->seekhead_pos + 144, mux->tags_pos - mux->segment_master); } else { /* void'ify */ guint64 my_pos = ebml->pos; gst_ebml_write_seek (ebml, mux->seekhead_pos + 124); gst_ebml_write_buffer_header (ebml, GST_EBML_ID_VOID, 26); gst_ebml_write_seek (ebml, my_pos); } /* update duration */ /* first get the overall duration */ /* a released track may have left a duration in here */ duration = mux->duration; for (collected = mux->collect->data; collected; collected = g_slist_next (collected)) { GstMatroskaPad *collect_pad; GstClockTime min_duration; /* observed minimum duration */ collect_pad = (GstMatroskaPad *) collected->data; /* no need to check if start_ts and end_ts are set, in the worst case * they're both -1 and we'll end up with a duration of 0 again */ min_duration = GST_CLOCK_DIFF (collect_pad->start_ts, collect_pad->end_ts); if (collect_pad->duration < min_duration) collect_pad->duration = min_duration; GST_DEBUG_OBJECT (collect_pad, "final track duration: %" GST_TIME_FORMAT, GST_TIME_ARGS (collect_pad->duration)); if (collect_pad->duration > duration) duration = collect_pad->duration; } if (duration != 0) { GST_DEBUG_OBJECT (mux, "final total duration: %" GST_TIME_FORMAT, GST_TIME_ARGS (duration)); 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"); /* make note of first and last encountered timestamps, so we can calculate * the actual duration later when we send an updated header on eos */ best->end_ts = GST_BUFFER_TIMESTAMP (best->buffer); if (GST_BUFFER_DURATION_IS_VALID (best->buffer)) best->end_ts += GST_BUFFER_DURATION (best->buffer); else if (best->track->default_duration) best->end_ts += best->track->default_duration; if (G_UNLIKELY (best->start_ts == GST_CLOCK_TIME_NONE)) { best->start_ts = GST_BUFFER_TIMESTAMP (best->buffer); } /* 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); }