/* AVI muxer plugin for GStreamer * Copyright (C) 2002 Ronald Bultje * (C) 2006 Mark Nauwelaerts * * 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. */ /* based on: * - the old avimuxer (by Wim Taymans) * - xawtv's aviwriter (by Gerd Knorr) * - mjpegtools' avilib (by Rainer Johanni) * - openDML large-AVI docs */ /** * SECTION:element-avimux * * Muxes raw or compressed audio and/or video streams into an AVI file. * * * Example launch lines * (write everything in one line, without the backslash characters) * |[ * gst-launch-1.0 videotestsrc num-buffers=250 \ * ! 'video/x-raw,format=(string)I420,width=320,height=240,framerate=(fraction)25/1' \ * ! queue ! mux. \ * audiotestsrc num-buffers=440 ! audioconvert \ * ! 'audio/x-raw,rate=44100,channels=2' ! queue ! mux. \ * avimux name=mux ! filesink location=test.avi * ]| This will create an .AVI file containing an uncompressed video stream * with a test picture and an uncompressed audio stream containing a * test sound. * |[ * gst-launch-1.0 videotestsrc num-buffers=250 \ * ! 'video/x-raw,format=(string)I420,width=320,height=240,framerate=(fraction)25/1' \ * ! xvidenc ! queue ! mux. \ * audiotestsrc num-buffers=440 ! audioconvert ! 'audio/x-raw,rate=44100,channels=2' \ * ! lame ! queue ! mux. \ * avimux name=mux ! filesink location=test.avi * ]| This will create an .AVI file containing the same test video and sound * as above, only that both streams will be compressed this time. This will * only work if you have the necessary encoder elements installed of course. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gst/gst-i18n-plugin.h" #include #include #include #include #include #include #include "gstavimux.h" GST_DEBUG_CATEGORY_STATIC (avimux_debug); #define GST_CAT_DEFAULT avimux_debug enum { ARG_0, ARG_BIGFILE }; #define DEFAULT_BIGFILE TRUE static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-msvideo") ); static GstStaticPadTemplate video_sink_factory = GST_STATIC_PAD_TEMPLATE ("video_%u", GST_PAD_SINK, GST_PAD_REQUEST, GST_STATIC_CAPS ("video/x-raw, " "format = (string) { YUY2, I420 }, " "width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0, MAX ]; " "image/jpeg, " "width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0, MAX ]; " "video/x-divx, " "width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0, MAX ], " "divxversion = (int) [ 3, 5 ]; " "video/x-msmpeg, " "width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0, MAX ], " "msmpegversion = (int) [ 41, 43 ]; " "video/mpeg, " "width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0, MAX ], " "mpegversion = (int) { 1, 2, 4}, " "systemstream = (boolean) FALSE; " "video/x-h263, " "width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0, MAX ]; " "video/x-h264, " "stream-format = (string) byte-stream, " "alignment = (string) au, " "width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0, MAX ]; " "video/x-dv, " "width = (int) 720, " "height = (int) { 576, 480 }, " "framerate = (fraction) [ 0, MAX ], " "systemstream = (boolean) FALSE; " "video/x-huffyuv, " "width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0, MAX ];" "video/x-wmv, " "width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0, MAX ], " "wmvversion = (int) [ 1, 3];" "image/x-jpc, " "width = (int) [ 1, 2147483647 ], " "height = (int) [ 1, 2147483647 ], " "framerate = (fraction) [ 0, MAX ];" "video/x-vp8, " "width = (int) [ 1, 2147483647 ], " "height = (int) [ 1, 2147483647 ], " "framerate = (fraction) [ 0, MAX ]") ); static GstStaticPadTemplate audio_sink_factory = GST_STATIC_PAD_TEMPLATE ("audio_%u", GST_PAD_SINK, GST_PAD_REQUEST, GST_STATIC_CAPS ("audio/x-raw, " "format = (string) { U8, S16LE }, " "rate = (int) [ 1000, 96000 ], " "channels = (int) [ 1, 2 ]; " "audio/mpeg, " "mpegversion = (int) 1, " "layer = (int) [ 1, 3 ], " "rate = (int) [ 1000, 96000 ], " "channels = (int) [ 1, 2 ]; " "audio/mpeg, " "mpegversion = (int) 4, " "stream-format = (string) raw, " "rate = (int) [ 1000, 96000 ], " "channels = (int) [ 1, 2 ]; " /*#if 0 VC6 doesn't support #if here ... "audio/x-vorbis, " "rate = (int) [ 1000, 96000 ], " "channels = (int) [ 1, 2 ]; " #endif*/ "audio/x-ac3, " "rate = (int) [ 1000, 96000 ], " "channels = (int) [ 1, 6 ]; " "audio/x-alaw, " "rate = (int) [ 1000, 48000 ], " "channels = (int) [ 1, 2 ]; " "audio/x-mulaw, " "rate = (int) [ 1000, 48000 ], " "channels = (int) [ 1, 2 ]; " "audio/x-wma, " "rate = (int) [ 1000, 96000 ], " "channels = (int) [ 1, 2 ], " "wmaversion = (int) [ 1, 2 ] ") ); static void gst_avi_mux_pad_reset (GstAviPad * avipad, gboolean free); static GstFlowReturn gst_avi_mux_collect_pads (GstCollectPads * pads, GstAviMux * avimux); static gboolean gst_avi_mux_handle_event (GstCollectPads * pad, GstCollectData * data, GstEvent * event, gpointer user_data); static GstPad *gst_avi_mux_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * name, const GstCaps * caps); static void gst_avi_mux_release_pad (GstElement * element, GstPad * pad); static void gst_avi_mux_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_avi_mux_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstStateChangeReturn gst_avi_mux_change_state (GstElement * element, GstStateChange transition); #define gst_avi_mux_parent_class parent_class G_DEFINE_TYPE_WITH_CODE (GstAviMux, gst_avi_mux, GST_TYPE_ELEMENT, G_IMPLEMENT_INTERFACE (GST_TYPE_TAG_SETTER, NULL)); static void gst_avi_mux_finalize (GObject * object) { GstAviMux *mux = GST_AVI_MUX (object); GSList *node; /* completely free each sinkpad */ node = mux->sinkpads; while (node) { GstAviPad *avipad = (GstAviPad *) node->data; node = node->next; gst_avi_mux_pad_reset (avipad, TRUE); g_free (avipad); } g_slist_free (mux->sinkpads); mux->sinkpads = NULL; g_free (mux->idx); mux->idx = NULL; gst_object_unref (mux->collect); G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_avi_mux_class_init (GstAviMuxClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; GST_DEBUG_CATEGORY_INIT (avimux_debug, "avimux", 0, "Muxer for AVI streams"); gobject_class->get_property = gst_avi_mux_get_property; gobject_class->set_property = gst_avi_mux_set_property; gobject_class->finalize = gst_avi_mux_finalize; g_object_class_install_property (gobject_class, ARG_BIGFILE, g_param_spec_boolean ("bigfile", "Bigfile Support (>2GB)", "Support for openDML-2.0 (big) AVI files", DEFAULT_BIGFILE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR (gst_avi_mux_request_new_pad); gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_avi_mux_release_pad); gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_avi_mux_change_state); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&src_factory)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&audio_sink_factory)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&video_sink_factory)); gst_element_class_set_static_metadata (gstelement_class, "Avi muxer", "Codec/Muxer", "Muxes audio and video into an avi stream", "GStreamer maintainers "); } /* reset pad to initial state * free - if true, release all, not only stream related, data */ static void gst_avi_mux_pad_reset (GstAviPad * avipad, gboolean free) { /* generic part */ memset (&(avipad->hdr), 0, sizeof (gst_riff_strh)); memset (&(avipad->idx[0]), 0, sizeof (avipad->idx)); if (free) { g_free (avipad->tag); avipad->tag = NULL; g_free (avipad->idx_tag); avipad->idx_tag = NULL; } if (avipad->is_video) { GstAviVideoPad *vidpad = (GstAviVideoPad *) avipad; avipad->hdr.type = GST_MAKE_FOURCC ('v', 'i', 'd', 's'); if (vidpad->vids_codec_data) { gst_buffer_unref (vidpad->vids_codec_data); vidpad->vids_codec_data = NULL; } if (vidpad->prepend_buffer) { gst_buffer_unref (vidpad->prepend_buffer); vidpad->prepend_buffer = NULL; } memset (&(vidpad->vids), 0, sizeof (gst_riff_strf_vids)); memset (&(vidpad->vprp), 0, sizeof (gst_riff_vprp)); } else { GstAviAudioPad *audpad = (GstAviAudioPad *) avipad; audpad->samples = 0; avipad->hdr.type = GST_MAKE_FOURCC ('a', 'u', 'd', 's'); if (audpad->auds_codec_data) { gst_buffer_unref (audpad->auds_codec_data); audpad->auds_codec_data = NULL; } memset (&(audpad->auds), 0, sizeof (gst_riff_strf_auds)); } } static void gst_avi_mux_reset (GstAviMux * avimux) { GSList *node, *newlist = NULL; /* free and reset each sinkpad */ node = avimux->sinkpads; while (node) { GstAviPad *avipad = (GstAviPad *) node->data; node = node->next; gst_avi_mux_pad_reset (avipad, FALSE); /* if this pad has collectdata, keep it, otherwise dump it completely */ if (avipad->collect) newlist = g_slist_append (newlist, avipad); else { gst_avi_mux_pad_reset (avipad, TRUE); g_free (avipad); } } /* free the old list of sinkpads, only keep the real collecting ones */ g_slist_free (avimux->sinkpads); avimux->sinkpads = newlist; /* avi data */ avimux->num_frames = 0; memset (&(avimux->avi_hdr), 0, sizeof (gst_riff_avih)); avimux->avi_hdr.max_bps = 10000000; avimux->codec_data_size = 0; if (avimux->tags_snap) { gst_tag_list_unref (avimux->tags_snap); avimux->tags_snap = NULL; } g_free (avimux->idx); avimux->idx = NULL; /* state info */ avimux->write_header = TRUE; /* tags */ gst_tag_setter_reset_tags (GST_TAG_SETTER (avimux)); } static void gst_avi_mux_init (GstAviMux * avimux) { avimux->srcpad = gst_pad_new_from_static_template (&src_factory, "src"); gst_pad_use_fixed_caps (avimux->srcpad); gst_element_add_pad (GST_ELEMENT (avimux), avimux->srcpad); /* property */ avimux->enable_large_avi = DEFAULT_BIGFILE; avimux->collect = gst_collect_pads_new (); gst_collect_pads_set_function (avimux->collect, (GstCollectPadsFunction) (GST_DEBUG_FUNCPTR (gst_avi_mux_collect_pads)), avimux); gst_collect_pads_set_event_function (avimux->collect, (GstCollectPadsEventFunction) (GST_DEBUG_FUNCPTR (gst_avi_mux_handle_event)), avimux); /* set to clean state */ gst_avi_mux_reset (avimux); } static gboolean gst_avi_mux_vidsink_set_caps (GstPad * pad, GstCaps * vscaps) { GstAviMux *avimux; GstAviVideoPad *avipad; GstAviCollectData *collect_pad; GstStructure *structure; const gchar *mimetype; const GValue *fps, *par; const GValue *codec_data; gint width, height; gint par_n, par_d; gboolean codec_data_in_headers = TRUE; avimux = GST_AVI_MUX (gst_pad_get_parent (pad)); /* find stream data */ collect_pad = (GstAviCollectData *) gst_pad_get_element_private (pad); g_assert (collect_pad); avipad = (GstAviVideoPad *) collect_pad->avipad; g_assert (avipad); g_assert (avipad->parent.is_video); g_assert (avipad->parent.hdr.type == GST_MAKE_FOURCC ('v', 'i', 'd', 's')); GST_DEBUG_OBJECT (avimux, "%s:%s, caps=%" GST_PTR_FORMAT, GST_DEBUG_PAD_NAME (pad), vscaps); structure = gst_caps_get_structure (vscaps, 0); mimetype = gst_structure_get_name (structure); /* global */ avipad->vids.size = sizeof (gst_riff_strf_vids); avipad->vids.planes = 1; if (!gst_structure_get_int (structure, "width", &width) || !gst_structure_get_int (structure, "height", &height)) { goto refuse_caps; } avipad->vids.width = width; avipad->vids.height = height; fps = gst_structure_get_value (structure, "framerate"); if (fps == NULL || !GST_VALUE_HOLDS_FRACTION (fps)) goto refuse_caps; avipad->parent.hdr.rate = gst_value_get_fraction_numerator (fps); avipad->parent.hdr.scale = gst_value_get_fraction_denominator (fps); /* (pixel) aspect ratio data, if any */ par = gst_structure_get_value (structure, "pixel-aspect-ratio"); /* only use video properties header if there is non-trivial aspect info */ if (par && GST_VALUE_HOLDS_FRACTION (par) && ((par_n = gst_value_get_fraction_numerator (par)) != (par_d = gst_value_get_fraction_denominator (par)))) { GValue to_ratio = { 0, }; guint ratio_n, ratio_d; /* some fraction voodoo to obtain simplest possible ratio */ g_value_init (&to_ratio, GST_TYPE_FRACTION); gst_value_set_fraction (&to_ratio, width * par_n, height * par_d); ratio_n = gst_value_get_fraction_numerator (&to_ratio); ratio_d = gst_value_get_fraction_denominator (&to_ratio); GST_DEBUG_OBJECT (avimux, "generating vprp data with aspect ratio %d/%d", ratio_n, ratio_d); /* simply fill in */ avipad->vprp.vert_rate = avipad->parent.hdr.rate / avipad->parent.hdr.scale; avipad->vprp.hor_t_total = width; avipad->vprp.vert_lines = height; avipad->vprp.aspect = (ratio_n) << 16 | (ratio_d & 0xffff); avipad->vprp.width = width; avipad->vprp.height = height; avipad->vprp.fields = 1; avipad->vprp.field_info[0].compressed_bm_height = height; avipad->vprp.field_info[0].compressed_bm_width = width; avipad->vprp.field_info[0].valid_bm_height = height; avipad->vprp.field_info[0].valid_bm_width = width; } if (!strcmp (mimetype, "video/x-raw")) { const gchar *format; GstVideoFormat fmt; format = gst_structure_get_string (structure, "format"); fmt = gst_video_format_from_string (format); switch (fmt) { case GST_VIDEO_FORMAT_YUY2: avipad->vids.compression = GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'); avipad->vids.bit_cnt = 16; break; case GST_VIDEO_FORMAT_I420: avipad->vids.compression = GST_MAKE_FOURCC ('I', '4', '2', '0'); avipad->vids.bit_cnt = 12; break; default: break; } } else { avipad->vids.bit_cnt = 24; avipad->vids.compression = 0; /* find format */ if (!strcmp (mimetype, "video/x-huffyuv")) { avipad->vids.compression = GST_MAKE_FOURCC ('H', 'F', 'Y', 'U'); } else if (!strcmp (mimetype, "image/jpeg")) { avipad->vids.compression = GST_MAKE_FOURCC ('M', 'J', 'P', 'G'); } else if (!strcmp (mimetype, "video/x-divx")) { gint divxversion; gst_structure_get_int (structure, "divxversion", &divxversion); switch (divxversion) { case 3: avipad->vids.compression = GST_MAKE_FOURCC ('D', 'I', 'V', '3'); break; case 4: avipad->vids.compression = GST_MAKE_FOURCC ('D', 'I', 'V', 'X'); break; case 5: avipad->vids.compression = GST_MAKE_FOURCC ('D', 'X', '5', '0'); break; } } else if (gst_structure_has_name (structure, "video/x-msmpeg")) { gint msmpegversion; gst_structure_get_int (structure, "msmpegversion", &msmpegversion); switch (msmpegversion) { case 41: avipad->vids.compression = GST_MAKE_FOURCC ('M', 'P', 'G', '4'); break; case 42: avipad->vids.compression = GST_MAKE_FOURCC ('M', 'P', '4', '2'); break; case 43: avipad->vids.compression = GST_MAKE_FOURCC ('M', 'P', '4', '3'); break; default: GST_INFO ("unhandled msmpegversion : %d, fall back to fourcc=MPEG", msmpegversion); avipad->vids.compression = GST_MAKE_FOURCC ('M', 'P', 'E', 'G'); break; } } else if (!strcmp (mimetype, "video/x-dv")) { avipad->vids.compression = GST_MAKE_FOURCC ('D', 'V', 'S', 'D'); } else if (!strcmp (mimetype, "video/x-h263")) { avipad->vids.compression = GST_MAKE_FOURCC ('H', '2', '6', '3'); } else if (!strcmp (mimetype, "video/x-h264")) { avipad->vids.compression = GST_MAKE_FOURCC ('H', '2', '6', '4'); } else if (!strcmp (mimetype, "video/mpeg")) { gint mpegversion; gst_structure_get_int (structure, "mpegversion", &mpegversion); switch (mpegversion) { case 2: avipad->vids.compression = GST_MAKE_FOURCC ('M', 'P', 'G', '2'); break; case 4: /* mplayer/ffmpeg might not work with DIVX, but with FMP4 */ avipad->vids.compression = GST_MAKE_FOURCC ('D', 'I', 'V', 'X'); /* DIVX/XVID in AVI store the codec_data chunk as part of the first data buffer. So for this case, we prepend the codec_data blob (if any) to that first buffer */ codec_data_in_headers = FALSE; break; default: GST_INFO ("unhandled mpegversion : %d, fall back to fourcc=MPEG", mpegversion); avipad->vids.compression = GST_MAKE_FOURCC ('M', 'P', 'E', 'G'); break; } } else if (!strcmp (mimetype, "video/x-wmv")) { gint wmvversion; if (gst_structure_get_int (structure, "wmvversion", &wmvversion)) { switch (wmvversion) { case 1: avipad->vids.compression = GST_MAKE_FOURCC ('W', 'M', 'V', '1'); break; case 2: avipad->vids.compression = GST_MAKE_FOURCC ('W', 'M', 'V', '2'); break; case 3: avipad->vids.compression = GST_MAKE_FOURCC ('W', 'M', 'V', '3'); default: break; } } } else if (!strcmp (mimetype, "image/x-jpc")) { avipad->vids.compression = GST_MAKE_FOURCC ('M', 'J', '2', 'C'); } else if (!strcmp (mimetype, "video/x-vp8")) { avipad->vids.compression = GST_MAKE_FOURCC ('V', 'P', '8', '0'); } if (!avipad->vids.compression) goto refuse_caps; } /* codec initialization data, if any */ codec_data = gst_structure_get_value (structure, "codec_data"); if (codec_data) { if (codec_data_in_headers) { avipad->vids_codec_data = gst_value_get_buffer (codec_data); gst_buffer_ref (avipad->vids_codec_data); /* keep global track of size */ avimux->codec_data_size += gst_buffer_get_size (avipad->vids_codec_data); } else { avipad->prepend_buffer = gst_buffer_ref (gst_value_get_buffer (codec_data)); } } avipad->parent.hdr.fcc_handler = avipad->vids.compression; avipad->vids.image_size = avipad->vids.height * avipad->vids.width; /* hm, maybe why avi only handles one stream well ... */ avimux->avi_hdr.width = avipad->vids.width; avimux->avi_hdr.height = avipad->vids.height; avimux->avi_hdr.us_frame = 1000000. * avipad->parent.hdr.scale / avipad->parent.hdr.rate; gst_object_unref (avimux); return TRUE; refuse_caps: { GST_WARNING_OBJECT (avimux, "refused caps %" GST_PTR_FORMAT, vscaps); gst_object_unref (avimux); return FALSE; } } static GstFlowReturn gst_avi_mux_audsink_scan_mpeg_audio (GstAviMux * avimux, GstAviPad * avipad, GstBuffer * buffer) { GstMapInfo map; guint spf; guint32 header; gulong layer; gulong version; gint lsf, mpg25; gst_buffer_map (buffer, &map, GST_MAP_READ); if (map.size < 4) goto not_parsed; header = GST_READ_UINT32_BE (map.data); if ((header & 0xffe00000) != 0xffe00000) goto not_parsed; /* thanks go to mp3parse */ if (header & (1 << 20)) { lsf = (header & (1 << 19)) ? 0 : 1; mpg25 = 0; } else { lsf = 1; mpg25 = 1; } version = 1 + lsf + mpg25; layer = 4 - ((header >> 17) & 0x3); /* see http://www.codeproject.com/audio/MPEGAudioInfo.asp */ if (layer == 1) spf = 384; else if (layer == 2) spf = 1152; else if (version == 1) { spf = 1152; } else { /* MPEG-2 or "2.5" */ spf = 576; } if (G_UNLIKELY (avipad->hdr.scale <= 1)) avipad->hdr.scale = spf; else if (G_UNLIKELY (avipad->hdr.scale != spf)) { GST_WARNING_OBJECT (avimux, "input mpeg audio has varying frame size"); goto cbr_fallback; } done: gst_buffer_unmap (buffer, &map); return GST_FLOW_OK; /* EXITS */ not_parsed: { GST_WARNING_OBJECT (avimux, "input mpeg audio is not parsed"); /* fall-through */ } cbr_fallback: { GST_WARNING_OBJECT (avimux, "falling back to CBR muxing"); avipad->hdr.scale = 1; /* no need to check further */ avipad->hook = NULL; goto done; } } static void gst_avi_mux_audsink_set_fields (GstAviMux * avimux, GstAviAudioPad * avipad) { if (avipad->parent.hdr.scale > 1) { /* vbr case: fixed duration per frame/chunk */ avipad->parent.hdr.rate = avipad->auds.rate; avipad->parent.hdr.samplesize = 0; /* FIXME ?? some rumours say this should be largest audio chunk size */ avipad->auds.blockalign = avipad->parent.hdr.scale; } else { /* by spec, hdr.rate is av_bps related, is calculated that way in stop_file, * and reduces to sample rate in PCM like cases */ avipad->parent.hdr.rate = avipad->auds.av_bps / avipad->auds.blockalign; avipad->parent.hdr.samplesize = avipad->auds.blockalign; avipad->parent.hdr.scale = 1; } } static gboolean gst_avi_mux_audsink_set_caps (GstPad * pad, GstCaps * vscaps) { GstAviMux *avimux; GstAviAudioPad *avipad; GstAviCollectData *collect_pad; GstStructure *structure; const gchar *mimetype; const GValue *codec_data; gint channels, rate; avimux = GST_AVI_MUX (gst_pad_get_parent (pad)); /* find stream data */ collect_pad = (GstAviCollectData *) gst_pad_get_element_private (pad); g_assert (collect_pad); avipad = (GstAviAudioPad *) collect_pad->avipad; g_assert (avipad); g_assert (!avipad->parent.is_video); g_assert (avipad->parent.hdr.type == GST_MAKE_FOURCC ('a', 'u', 'd', 's')); GST_DEBUG_OBJECT (avimux, "%s:%s, caps=%" GST_PTR_FORMAT, GST_DEBUG_PAD_NAME (pad), vscaps); structure = gst_caps_get_structure (vscaps, 0); mimetype = gst_structure_get_name (structure); /* we want these for all */ if (!gst_structure_get_int (structure, "channels", &channels) || !gst_structure_get_int (structure, "rate", &rate)) { goto refuse_caps; } avipad->auds.channels = channels; avipad->auds.rate = rate; /* codec initialization data, if any */ codec_data = gst_structure_get_value (structure, "codec_data"); if (codec_data) { avipad->auds_codec_data = gst_value_get_buffer (codec_data); gst_buffer_ref (avipad->auds_codec_data); /* keep global track of size */ avimux->codec_data_size += gst_buffer_get_size (avipad->auds_codec_data); } if (!strcmp (mimetype, "audio/x-raw")) { const gchar *format; GstAudioFormat fmt; format = gst_structure_get_string (structure, "format"); fmt = gst_audio_format_from_string (format); switch (fmt) { case GST_AUDIO_FORMAT_U8: avipad->auds.blockalign = 8; avipad->auds.bits_per_sample = 8; break; case GST_AUDIO_FORMAT_S16: avipad->auds.blockalign = 16; avipad->auds.bits_per_sample = 16; break; default: goto refuse_caps; } avipad->auds.format = GST_RIFF_WAVE_FORMAT_PCM; /* set some more info straight */ avipad->auds.blockalign /= 8; avipad->auds.blockalign *= avipad->auds.channels; avipad->auds.av_bps = avipad->auds.blockalign * avipad->auds.rate; } else { avipad->auds.format = 0; /* set some defaults */ avipad->auds.blockalign = 1; avipad->auds.av_bps = 0; avipad->auds.bits_per_sample = 16; if (!strcmp (mimetype, "audio/mpeg")) { gint mpegversion; gst_structure_get_int (structure, "mpegversion", &mpegversion); switch (mpegversion) { case 1:{ gint layer = 3; gboolean parsed = FALSE; gst_structure_get_int (structure, "layer", &layer); gst_structure_get_boolean (structure, "parsed", &parsed); switch (layer) { case 3: avipad->auds.format = GST_RIFF_WAVE_FORMAT_MPEGL3; break; case 1: case 2: avipad->auds.format = GST_RIFF_WAVE_FORMAT_MPEGL12; break; } if (parsed) { /* treat as VBR, should also cover CBR case; * setup hook to parse frame header and determine spf */ avipad->parent.hook = gst_avi_mux_audsink_scan_mpeg_audio; } else { GST_WARNING_OBJECT (avimux, "unparsed MPEG audio input (?), " "doing CBR muxing"); } break; } case 4: { GstBuffer *codec_data_buf = avipad->auds_codec_data; const gchar *stream_format; guint codec; guint8 data[2]; stream_format = gst_structure_get_string (structure, "stream-format"); if (stream_format) { if (strcmp (stream_format, "raw") != 0) { GST_WARNING_OBJECT (avimux, "AAC's stream format '%s' is not " "supported, please use 'raw'", stream_format); break; } } else { GST_WARNING_OBJECT (avimux, "AAC's stream-format not specified, " "assuming 'raw'"); } /* vbr case needs some special handling */ if (!codec_data_buf || gst_buffer_get_size (codec_data_buf) < 2) { GST_WARNING_OBJECT (avimux, "no (valid) codec_data for AAC audio"); break; } avipad->auds.format = GST_RIFF_WAVE_FORMAT_AAC; /* need to determine frame length */ gst_buffer_extract (codec_data_buf, 0, data, 2); codec = GST_READ_UINT16_BE (data); avipad->parent.hdr.scale = (codec & 0x4) ? 960 : 1024; break; } } } else if (!strcmp (mimetype, "audio/x-vorbis")) { avipad->auds.format = GST_RIFF_WAVE_FORMAT_VORBIS3; } else if (!strcmp (mimetype, "audio/x-ac3")) { avipad->auds.format = GST_RIFF_WAVE_FORMAT_A52; } else if (!strcmp (mimetype, "audio/x-alaw")) { avipad->auds.format = GST_RIFF_WAVE_FORMAT_ALAW; avipad->auds.bits_per_sample = 8; avipad->auds.blockalign = avipad->auds.channels; avipad->auds.av_bps = avipad->auds.blockalign * avipad->auds.rate; } else if (!strcmp (mimetype, "audio/x-mulaw")) { avipad->auds.format = GST_RIFF_WAVE_FORMAT_MULAW; avipad->auds.bits_per_sample = 8; avipad->auds.blockalign = avipad->auds.channels; avipad->auds.av_bps = avipad->auds.blockalign * avipad->auds.rate; } else if (!strcmp (mimetype, "audio/x-wma")) { gint version; gint bitrate; gint block_align; if (gst_structure_get_int (structure, "wmaversion", &version)) { switch (version) { case 1: avipad->auds.format = GST_RIFF_WAVE_FORMAT_WMAV1; break; case 2: avipad->auds.format = GST_RIFF_WAVE_FORMAT_WMAV2; break; default: break; } } if (avipad->auds.format != 0) { if (gst_structure_get_int (structure, "block_align", &block_align)) { avipad->auds.blockalign = block_align; } if (gst_structure_get_int (structure, "bitrate", &bitrate)) { avipad->auds.av_bps = bitrate / 8; } } } } if (!avipad->auds.format) goto refuse_caps; avipad->parent.hdr.fcc_handler = avipad->auds.format; gst_avi_mux_audsink_set_fields (avimux, avipad); gst_object_unref (avimux); return TRUE; refuse_caps: { GST_WARNING_OBJECT (avimux, "refused caps %" GST_PTR_FORMAT, vscaps); gst_object_unref (avimux); return FALSE; } } static GstPad * gst_avi_mux_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps) { GstAviMux *avimux; GstPad *newpad; GstAviPad *avipad; GstElementClass *klass; gchar *name = NULL; const gchar *pad_name = NULL; gint pad_id; g_return_val_if_fail (templ != NULL, NULL); if (templ->direction != GST_PAD_SINK) goto wrong_direction; g_return_val_if_fail (GST_IS_AVI_MUX (element), NULL); avimux = GST_AVI_MUX (element); if (!avimux->write_header) goto too_late; klass = GST_ELEMENT_GET_CLASS (element); if (templ == gst_element_class_get_pad_template (klass, "audio_%u")) { /* don't mix named and unnamed pads, if the pad already exists we fail when * trying to add it */ if (req_name != NULL && sscanf (req_name, "audio_%u", &pad_id) == 1) { pad_name = req_name; } else { name = g_strdup_printf ("audio_%u", avimux->audio_pads++); pad_name = name; } /* init pad specific data */ avipad = g_malloc0 (sizeof (GstAviAudioPad)); avipad->is_video = FALSE; avipad->hdr.type = GST_MAKE_FOURCC ('a', 'u', 'd', 's'); /* audio goes last */ avimux->sinkpads = g_slist_append (avimux->sinkpads, avipad); } else if (templ == gst_element_class_get_pad_template (klass, "video_%u")) { /* though streams are pretty generic and relatively self-contained, * some video info goes in a single avi header -and therefore mux struct- * so video restricted to one stream */ if (avimux->video_pads > 0) goto too_many_video_pads; /* setup pad */ pad_name = "video_0"; avimux->video_pads++; /* init pad specific data */ avipad = g_malloc0 (sizeof (GstAviVideoPad)); avipad->is_video = TRUE; avipad->hdr.type = GST_MAKE_FOURCC ('v', 'i', 'd', 's'); /* video goes first */ avimux->sinkpads = g_slist_prepend (avimux->sinkpads, avipad); } else goto wrong_template; newpad = gst_pad_new_from_template (templ, pad_name); g_free (name); avipad->collect = gst_collect_pads_add_pad (avimux->collect, newpad, sizeof (GstAviCollectData)); ((GstAviCollectData *) (avipad->collect))->avipad = avipad; if (!gst_element_add_pad (element, newpad)) goto pad_add_failed; GST_DEBUG_OBJECT (newpad, "Added new request pad"); return newpad; /* ERRORS */ wrong_direction: { g_warning ("avimux: request pad that is not a SINK pad\n"); return NULL; } too_late: { g_warning ("avimux: request pad cannot be added after streaming started\n"); return NULL; } wrong_template: { g_warning ("avimux: this is not our template!\n"); return NULL; } too_many_video_pads: { GST_WARNING_OBJECT (avimux, "Can only have one video stream"); return NULL; } pad_add_failed: { GST_WARNING_OBJECT (avimux, "Adding the new pad '%s' failed", pad_name); gst_object_unref (newpad); return NULL; } } static void gst_avi_mux_release_pad (GstElement * element, GstPad * pad) { GstAviMux *avimux = GST_AVI_MUX (element); GSList *node; node = avimux->sinkpads; while (node) { GstAviPad *avipad = (GstAviPad *) node->data; if (avipad->collect->pad == pad) { /* pad count should not be adjusted, * as it also represent number of streams present */ avipad->collect = NULL; GST_DEBUG_OBJECT (avimux, "removed pad '%s'", GST_PAD_NAME (pad)); gst_collect_pads_remove_pad (avimux->collect, pad); gst_element_remove_pad (element, pad); /* if not started yet, we can remove any sign this pad ever existed */ /* in this case _start will take care of the real pad count */ if (avimux->write_header) { avimux->sinkpads = g_slist_remove (avimux->sinkpads, avipad); gst_avi_mux_pad_reset (avipad, TRUE); g_free (avipad); } return; } node = node->next; } g_warning ("Unknown pad %s", GST_PAD_NAME (pad)); } static inline guint gst_avi_mux_start_chunk (GstByteWriter * bw, const gchar * tag, guint32 fourcc) { guint chunk_offset; gboolean hdl = TRUE; if (tag) hdl &= gst_byte_writer_put_data (bw, (const guint8 *) tag, 4); else hdl &= gst_byte_writer_put_uint32_le (bw, fourcc); chunk_offset = gst_byte_writer_get_pos (bw); /* real chunk size comes later */ hdl &= gst_byte_writer_put_uint32_le (bw, 0); return chunk_offset; } static inline void gst_avi_mux_end_chunk (GstByteWriter * bw, guint chunk_offset) { guint size; gboolean hdl = TRUE; size = gst_byte_writer_get_pos (bw); gst_byte_writer_set_pos (bw, chunk_offset); hdl &= gst_byte_writer_put_uint32_le (bw, size - chunk_offset - 4); gst_byte_writer_set_pos (bw, size); /* arrange for even padding */ if (size & 1) hdl &= gst_byte_writer_put_uint8 (bw, 0); } /* maybe some of these functions should be moved to riff.h? */ static void gst_avi_mux_write_tag (const GstTagList * list, const gchar * tag, gpointer data) { const struct { guint32 fcc; const gchar *tag; } rifftags[] = { { GST_RIFF_INFO_IARL, GST_TAG_LOCATION}, { GST_RIFF_INFO_IART, GST_TAG_ARTIST}, { GST_RIFF_INFO_ICMT, GST_TAG_COMMENT}, { GST_RIFF_INFO_ICOP, GST_TAG_COPYRIGHT}, { GST_RIFF_INFO_ICRD, GST_TAG_DATE}, { GST_RIFF_INFO_IGNR, GST_TAG_GENRE}, { GST_RIFF_INFO_IKEY, GST_TAG_KEYWORDS}, { GST_RIFF_INFO_INAM, GST_TAG_TITLE}, { GST_RIFF_INFO_ISFT, GST_TAG_ENCODER}, { GST_RIFF_INFO_ISRC, GST_TAG_ISRC}, { 0, NULL} }; gint n; gchar *str = NULL; GstByteWriter *bw = data; guint chunk; for (n = 0; rifftags[n].fcc != 0; n++) { if (!strcmp (rifftags[n].tag, tag)) { if (rifftags[n].fcc == GST_RIFF_INFO_ICRD) { GDate *date; /* special case for the date tag */ if (gst_tag_list_get_date (list, tag, &date)) { str = g_strdup_printf ("%04d:%02d:%02d", g_date_get_year (date), g_date_get_month (date), g_date_get_day (date)); g_date_free (date); } } else { gst_tag_list_get_string (list, tag, &str); } if (str) { chunk = gst_avi_mux_start_chunk (bw, NULL, rifftags[n].fcc); gst_byte_writer_put_string (bw, str); gst_avi_mux_end_chunk (bw, chunk); g_free (str); str = NULL; break; } } } } static GstBuffer * gst_avi_mux_riff_get_avi_header (GstAviMux * avimux) { const GstTagList *tags; GstBuffer *buffer = NULL; gint size = 0; GstByteWriter bw; GSList *node; guint avih, riff, hdrl; GstMapInfo map; gboolean hdl = TRUE; GST_DEBUG_OBJECT (avimux, "creating avi header, data_size %u, idx_size %u", avimux->data_size, avimux->idx_size); if (avimux->tags_snap) tags = avimux->tags_snap; else { /* need to make snapshot of current state of tags to ensure the same set * is used next time around during header rewrite at the end */ tags = gst_tag_setter_get_tag_list (GST_TAG_SETTER (avimux)); if (tags) tags = avimux->tags_snap = gst_tag_list_copy (tags); } gst_byte_writer_init_with_size (&bw, 1024, FALSE); /* avi header metadata */ riff = gst_avi_mux_start_chunk (&bw, "RIFF", 0); hdl &= gst_byte_writer_put_data (&bw, (guint8 *) "AVI ", 4); hdrl = gst_avi_mux_start_chunk (&bw, "LIST", 0); hdl &= gst_byte_writer_put_data (&bw, (guint8 *) "hdrl", 4); avih = gst_avi_mux_start_chunk (&bw, "avih", 0); /* the AVI header itself */ hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.us_frame); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.max_bps); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.pad_gran); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.flags); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.tot_frames); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.init_frames); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.streams); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.bufsize); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.width); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.height); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.scale); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.rate); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.start); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.length); gst_avi_mux_end_chunk (&bw, avih); /* stream data */ node = avimux->sinkpads; while (node) { GstAviPad *avipad = (GstAviPad *) node->data; GstAviVideoPad *vidpad = (GstAviVideoPad *) avipad; GstAviAudioPad *audpad = (GstAviAudioPad *) avipad; gint codec_size = 0; guint strh, strl, strf, indx; /* stream list metadata */ strl = gst_avi_mux_start_chunk (&bw, "LIST", 0); hdl &= gst_byte_writer_put_data (&bw, (guint8 *) "strl", 4); /* generic header */ strh = gst_avi_mux_start_chunk (&bw, "strh", 0); hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.type); hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.fcc_handler); hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.flags); hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.priority); hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.init_frames); hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.scale); hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.rate); hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.start); hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.length); hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.bufsize); hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.quality); hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.samplesize); hdl &= gst_byte_writer_put_uint16_le (&bw, 0); hdl &= gst_byte_writer_put_uint16_le (&bw, 0); hdl &= gst_byte_writer_put_uint16_le (&bw, 0); hdl &= gst_byte_writer_put_uint16_le (&bw, 0); gst_avi_mux_end_chunk (&bw, strh); if (avipad->is_video) { codec_size = vidpad->vids_codec_data ? gst_buffer_get_size (vidpad->vids_codec_data) : 0; /* the video header */ strf = gst_avi_mux_start_chunk (&bw, "strf", 0); /* the actual header */ hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.size + codec_size); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.width); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.height); hdl &= gst_byte_writer_put_uint16_le (&bw, vidpad->vids.planes); hdl &= gst_byte_writer_put_uint16_le (&bw, vidpad->vids.bit_cnt); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.compression); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.image_size); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.xpels_meter); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.ypels_meter); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.num_colors); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.imp_colors); if (vidpad->vids_codec_data) { gst_buffer_map (vidpad->vids_codec_data, &map, GST_MAP_READ); hdl &= gst_byte_writer_put_data (&bw, map.data, map.size); gst_buffer_unmap (vidpad->vids_codec_data, &map); } gst_avi_mux_end_chunk (&bw, strf); /* add video property data, mainly for aspect ratio, if any */ if (vidpad->vprp.aspect) { gint f; guint vprp; /* let's be on the safe side */ vidpad->vprp.fields = MIN (vidpad->vprp.fields, GST_RIFF_VPRP_VIDEO_FIELDS); /* the vprp header */ vprp = gst_avi_mux_start_chunk (&bw, "vprp", 0); /* the actual data */ hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.format_token); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.standard); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.vert_rate); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.hor_t_total); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.vert_lines); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.aspect); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.width); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.height); hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.fields); for (f = 0; f < vidpad->vprp.fields; ++f) { gst_riff_vprp_video_field_desc *fd; fd = &(vidpad->vprp.field_info[f]); hdl &= gst_byte_writer_put_uint32_le (&bw, fd->compressed_bm_height); hdl &= gst_byte_writer_put_uint32_le (&bw, fd->compressed_bm_width); hdl &= gst_byte_writer_put_uint32_le (&bw, fd->valid_bm_height); hdl &= gst_byte_writer_put_uint32_le (&bw, fd->valid_bm_width); hdl &= gst_byte_writer_put_uint32_le (&bw, fd->valid_bm_x_offset); hdl &= gst_byte_writer_put_uint32_le (&bw, fd->valid_bm_y_offset); hdl &= gst_byte_writer_put_uint32_le (&bw, fd->video_x_t_offset); hdl &= gst_byte_writer_put_uint32_le (&bw, fd->video_y_start); } gst_avi_mux_end_chunk (&bw, vprp); } } else { codec_size = audpad->auds_codec_data ? gst_buffer_get_size (audpad->auds_codec_data) : 0; /* the audio header */ strf = gst_avi_mux_start_chunk (&bw, "strf", 0); /* the actual header */ hdl &= gst_byte_writer_put_uint16_le (&bw, audpad->auds.format); hdl &= gst_byte_writer_put_uint16_le (&bw, audpad->auds.channels); hdl &= gst_byte_writer_put_uint32_le (&bw, audpad->auds.rate); hdl &= gst_byte_writer_put_uint32_le (&bw, audpad->auds.av_bps); hdl &= gst_byte_writer_put_uint16_le (&bw, audpad->auds.blockalign); hdl &= gst_byte_writer_put_uint16_le (&bw, audpad->auds.bits_per_sample); hdl &= gst_byte_writer_put_uint16_le (&bw, codec_size); if (audpad->auds_codec_data) { gst_buffer_map (audpad->auds_codec_data, &map, GST_MAP_READ); hdl &= gst_byte_writer_put_data (&bw, map.data, map.size); gst_buffer_unmap (vidpad->vids_codec_data, &map); } gst_avi_mux_end_chunk (&bw, strf); } /* odml superindex chunk */ if (avipad->idx_index > 0) indx = gst_avi_mux_start_chunk (&bw, "indx", 0); else indx = gst_avi_mux_start_chunk (&bw, "JUNK", 0); hdl &= gst_byte_writer_put_uint16_le (&bw, 4); /* bytes per entry */ hdl &= gst_byte_writer_put_uint8 (&bw, 0); /* index subtype */ hdl &= gst_byte_writer_put_uint8 (&bw, GST_AVI_INDEX_OF_INDEXES); /* index type */ hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->idx_index); /* entries in use */ hdl &= gst_byte_writer_put_data (&bw, (guint8 *) avipad->tag, 4); /* stream id */ hdl &= gst_byte_writer_put_uint32_le (&bw, 0); /* reserved */ hdl &= gst_byte_writer_put_uint32_le (&bw, 0); /* reserved */ hdl &= gst_byte_writer_put_uint32_le (&bw, 0); /* reserved */ hdl &= gst_byte_writer_put_data (&bw, (guint8 *) avipad->idx, GST_AVI_SUPERINDEX_COUNT * sizeof (gst_avi_superindex_entry)); gst_avi_mux_end_chunk (&bw, indx); /* end strl for this stream */ gst_avi_mux_end_chunk (&bw, strl); node = node->next; } if (avimux->video_pads > 0) { guint odml, dmlh; /* odml header */ odml = gst_avi_mux_start_chunk (&bw, "LIST", 0); hdl &= gst_byte_writer_put_data (&bw, (guint8 *) "odml", 4); dmlh = gst_avi_mux_start_chunk (&bw, "dmlh", 0); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->total_frames); gst_avi_mux_end_chunk (&bw, dmlh); gst_avi_mux_end_chunk (&bw, odml); } /* end hdrl */ gst_avi_mux_end_chunk (&bw, hdrl); /* tags */ if (tags) { guint info; info = gst_avi_mux_start_chunk (&bw, "LIST", 0); hdl &= gst_byte_writer_put_data (&bw, (guint8 *) "INFO", 4); gst_tag_list_foreach (tags, gst_avi_mux_write_tag, &bw); if (info + 8 == gst_byte_writer_get_pos (&bw)) { /* no tags writen, remove the empty INFO LIST as it is useless * and prevents playback in vlc */ gst_byte_writer_set_pos (&bw, info - 4); } else { gst_avi_mux_end_chunk (&bw, info); } } /* pop RIFF */ gst_avi_mux_end_chunk (&bw, riff); /* avi data header */ hdl &= gst_byte_writer_put_data (&bw, (guint8 *) "LIST", 4); hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->data_size); hdl &= gst_byte_writer_put_data (&bw, (guint8 *) "movi", 4); if (!hdl) goto beach; /* now get the data */ buffer = gst_byte_writer_reset_and_get_buffer (&bw); /* ... but RIFF includes more than just header */ gst_buffer_map (buffer, &map, GST_MAP_READWRITE); size = GST_READ_UINT32_LE (map.data + 4); size += 8 + avimux->data_size + avimux->idx_size; GST_WRITE_UINT32_LE (map.data + 4, size); GST_MEMDUMP_OBJECT (avimux, "avi header", map.data, map.size); gst_buffer_unmap (buffer, &map); beach: return buffer; } static GstBuffer * gst_avi_mux_riff_get_avix_header (guint32 datax_size) { GstBuffer *buffer; GstMapInfo map; buffer = gst_buffer_new_and_alloc (24); gst_buffer_map (buffer, &map, GST_MAP_WRITE); memcpy (map.data + 0, "RIFF", 4); GST_WRITE_UINT32_LE (map.data + 4, datax_size + 3 * 4); memcpy (map.data + 8, "AVIX", 4); memcpy (map.data + 12, "LIST", 4); GST_WRITE_UINT32_LE (map.data + 16, datax_size); memcpy (map.data + 20, "movi", 4); gst_buffer_unmap (buffer, &map); return buffer; } static inline GstBuffer * gst_avi_mux_riff_get_header (GstAviPad * avipad, guint32 video_frame_size) { GstBuffer *buffer; GstMapInfo map; buffer = gst_buffer_new_and_alloc (8); gst_buffer_map (buffer, &map, GST_MAP_WRITE); memcpy (map.data + 0, avipad->tag, 4); GST_WRITE_UINT32_LE (map.data + 4, video_frame_size); gst_buffer_unmap (buffer, &map); return buffer; } /* write an odml index chunk in the movi list */ static GstFlowReturn gst_avi_mux_write_avix_index (GstAviMux * avimux, GstAviPad * avipad, gchar * code, gchar * chunk, gst_avi_superindex_entry * super_index, gint * super_index_count) { GstFlowReturn res; GstBuffer *buffer; guint8 *data; gst_riff_index_entry *entry; gint i; guint32 size, entry_count; gboolean is_pcm = FALSE; guint32 pcm_samples = 0; GstMapInfo map; /* check if it is pcm */ if (avipad && !avipad->is_video) { GstAviAudioPad *audiopad = (GstAviAudioPad *) avipad; if (audiopad->auds.format == GST_RIFF_WAVE_FORMAT_PCM) { pcm_samples = audiopad->samples; is_pcm = TRUE; } } /* allocate the maximum possible */ buffer = gst_buffer_new_and_alloc (32 + 8 * avimux->idx_index); gst_buffer_map (buffer, &map, GST_MAP_WRITE); data = map.data; /* general index chunk info */ memcpy (map.data + 0, chunk, 4); /* chunk id */ GST_WRITE_UINT32_LE (map.data + 4, 0); /* chunk size; fill later */ GST_WRITE_UINT16_LE (map.data + 8, 2); /* index entry is 2 words */ map.data[10] = 0; /* index subtype */ map.data[11] = GST_AVI_INDEX_OF_CHUNKS; /* index type: AVI_INDEX_OF_CHUNKS */ GST_WRITE_UINT32_LE (map.data + 12, 0); /* entries in use; fill later */ memcpy (map.data + 16, code, 4); /* stream to which index refers */ GST_WRITE_UINT64_LE (map.data + 20, avimux->avix_start); /* base offset */ GST_WRITE_UINT32_LE (map.data + 28, 0); /* reserved */ map.data += 32; /* now the actual index entries */ i = avimux->idx_index; entry = avimux->idx; while (i > 0) { if (memcmp (&entry->id, code, 4) == 0) { /* enter relative offset to the data (!) */ GST_WRITE_UINT32_LE (map.data, GUINT32_FROM_LE (entry->offset) + 8); /* msb is set if not (!) keyframe */ GST_WRITE_UINT32_LE (map.data + 4, GUINT32_FROM_LE (entry->size) | (GUINT32_FROM_LE (entry->flags) & GST_RIFF_IF_KEYFRAME ? 0 : 1U << 31)); map.data += 8; } i--; entry++; } /* ok, now we know the size and no of entries, fill in where needed */ size = map.data - data; GST_WRITE_UINT32_LE (data + 4, size - 8); entry_count = (size - 32) / 8; GST_WRITE_UINT32_LE (data + 12, entry_count); gst_buffer_unmap (buffer, &map); gst_buffer_resize (buffer, 0, size); /* send */ if ((res = gst_pad_push (avimux->srcpad, buffer)) != GST_FLOW_OK) return res; /* keep track of this in superindex (if room) ... */ if (*super_index_count < GST_AVI_SUPERINDEX_COUNT) { i = *super_index_count; super_index[i].offset = GUINT64_TO_LE (avimux->total_data); super_index[i].size = GUINT32_TO_LE (size); if (is_pcm) { super_index[i].duration = GUINT32_TO_LE (pcm_samples); } else { super_index[i].duration = GUINT32_TO_LE (entry_count); } (*super_index_count)++; } else GST_WARNING_OBJECT (avimux, "No more room in superindex of stream %s", code); /* ... and in size */ avimux->total_data += size; if (avimux->is_bigfile) avimux->datax_size += size; else avimux->data_size += size; return GST_FLOW_OK; } /* some other usable functions (thankyou xawtv ;-) ) */ static void gst_avi_mux_add_index (GstAviMux * avimux, GstAviPad * avipad, guint32 flags, guint32 size) { gchar *code = avipad->tag; if (avimux->idx_index == avimux->idx_count) { avimux->idx_count += 256; avimux->idx = g_realloc (avimux->idx, avimux->idx_count * sizeof (gst_riff_index_entry)); } /* in case of pcm audio, we need to count the number of samples for * putting in the indx entries */ if (!avipad->is_video) { GstAviAudioPad *audiopad = (GstAviAudioPad *) avipad; if (audiopad->auds.format == GST_RIFF_WAVE_FORMAT_PCM) { audiopad->samples += size / audiopad->auds.blockalign; } } memcpy (&(avimux->idx[avimux->idx_index].id), code, 4); avimux->idx[avimux->idx_index].flags = GUINT32_TO_LE (flags); avimux->idx[avimux->idx_index].offset = GUINT32_TO_LE (avimux->idx_offset); avimux->idx[avimux->idx_index].size = GUINT32_TO_LE (size); avimux->idx_index++; } static GstFlowReturn gst_avi_mux_write_index (GstAviMux * avimux) { GstFlowReturn res; GstBuffer *buffer; GstMapInfo map; guint8 *data; gsize size; buffer = gst_buffer_new_and_alloc (8); gst_buffer_map (buffer, &map, GST_MAP_WRITE); memcpy (map.data + 0, "idx1", 4); GST_WRITE_UINT32_LE (map.data + 4, avimux->idx_index * sizeof (gst_riff_index_entry)); gst_buffer_unmap (buffer, &map); res = gst_pad_push (avimux->srcpad, buffer); if (res != GST_FLOW_OK) return res; buffer = gst_buffer_new (); size = avimux->idx_index * sizeof (gst_riff_index_entry); data = (guint8 *) avimux->idx; avimux->idx = NULL; /* will be free()'ed by gst_buffer_unref() */ gst_buffer_append_memory (buffer, gst_memory_new_wrapped (0, data, size, 0, size, data, g_free)); avimux->total_data += size + 8; res = gst_pad_push (avimux->srcpad, buffer); if (res != GST_FLOW_OK) return res; avimux->idx_size += avimux->idx_index * sizeof (gst_riff_index_entry) + 8; /* update header */ avimux->avi_hdr.flags |= GST_RIFF_AVIH_HASINDEX; return GST_FLOW_OK; } static GstFlowReturn gst_avi_mux_bigfile (GstAviMux * avimux, gboolean last) { GstFlowReturn res = GST_FLOW_OK; GstBuffer *header; GSList *node; /* first some odml standard index chunks in the movi list */ node = avimux->sinkpads; while (node) { GstAviPad *avipad = (GstAviPad *) node->data; node = node->next; res = gst_avi_mux_write_avix_index (avimux, avipad, avipad->tag, avipad->idx_tag, avipad->idx, &avipad->idx_index); if (res != GST_FLOW_OK) return res; } if (avimux->is_bigfile) { GstSegment segment; gst_segment_init (&segment, GST_FORMAT_BYTES); /* search back */ segment.start = avimux->avix_start; segment.time = avimux->avix_start; gst_pad_push_event (avimux->srcpad, gst_event_new_segment (&segment)); /* rewrite AVIX header */ header = gst_avi_mux_riff_get_avix_header (avimux->datax_size); res = gst_pad_push (avimux->srcpad, header); /* go back to current location, at least try */ segment.start = avimux->total_data; segment.time = avimux->total_data; gst_pad_push_event (avimux->srcpad, gst_event_new_segment (&segment)); if (res != GST_FLOW_OK) return res; } else { /* write a standard index in the first riff chunk */ res = gst_avi_mux_write_index (avimux); /* the index data/buffer is freed by pushing it */ avimux->idx_count = 0; if (res != GST_FLOW_OK) return res; } avimux->avix_start = avimux->total_data; if (last) return res; avimux->is_bigfile = TRUE; avimux->numx_frames = 0; avimux->datax_size = 4; /* movi tag */ avimux->idx_index = 0; node = avimux->sinkpads; while (node) { GstAviPad *avipad = (GstAviPad *) node->data; node = node->next; if (!avipad->is_video) { GstAviAudioPad *audiopad = (GstAviAudioPad *) avipad; audiopad->samples = 0; } } header = gst_avi_mux_riff_get_avix_header (0); avimux->total_data += gst_buffer_get_size (header); /* avix_start is used as base offset for the odml index chunk */ avimux->idx_offset = avimux->total_data - avimux->avix_start; return gst_pad_push (avimux->srcpad, header); } /* enough header blabla now, let's go on to actually writing the headers */ static GstFlowReturn gst_avi_mux_start_file (GstAviMux * avimux) { GstFlowReturn res; GstBuffer *header; GSList *node; GstCaps *caps; GstSegment segment; avimux->total_data = 0; avimux->total_frames = 0; avimux->data_size = 4; /* movi tag */ avimux->datax_size = 0; avimux->num_frames = 0; avimux->numx_frames = 0; avimux->avix_start = 0; avimux->idx_index = 0; avimux->idx_offset = 0; /* see 10 lines below */ avimux->idx_size = 0; avimux->idx_count = 0; avimux->idx = NULL; /* state */ avimux->write_header = FALSE; avimux->restart = FALSE; /* init streams, see what we've got */ node = avimux->sinkpads; avimux->audio_pads = avimux->video_pads = 0; while (node) { GstAviPad *avipad = (GstAviPad *) node->data; node = node->next; if (!avipad->is_video) { /* audio stream numbers must start at 1 iff there is a video stream 0; * request_pad inserts video pad at head of list, so this test suffices */ if (avimux->video_pads) avimux->audio_pads++; avipad->tag = g_strdup_printf ("%02uwb", avimux->audio_pads); avipad->idx_tag = g_strdup_printf ("ix%02u", avimux->audio_pads); if (!avimux->video_pads) avimux->audio_pads++; } else { avipad->tag = g_strdup_printf ("%02udb", avimux->video_pads); avipad->idx_tag = g_strdup_printf ("ix%02u", avimux->video_pads++); } } caps = gst_pad_get_pad_template_caps (avimux->srcpad); gst_pad_set_caps (avimux->srcpad, caps); gst_caps_unref (caps); /* let downstream know we think in BYTES and expect to do seeking later on */ gst_segment_init (&segment, GST_FORMAT_BYTES); gst_pad_push_event (avimux->srcpad, gst_event_new_segment (&segment)); /* header */ avimux->avi_hdr.streams = g_slist_length (avimux->sinkpads); avimux->is_bigfile = FALSE; header = gst_avi_mux_riff_get_avi_header (avimux); avimux->total_data += gst_buffer_get_size (header); res = gst_pad_push (avimux->srcpad, header); avimux->idx_offset = avimux->total_data; return res; } static GstFlowReturn gst_avi_mux_stop_file (GstAviMux * avimux) { GstFlowReturn res = GST_FLOW_OK; GstBuffer *header; GSList *node; GstSegment segment; /* if bigfile, rewrite header, else write indexes */ /* don't bail out at once if error, still try to re-write header */ if (avimux->video_pads > 0) { if (avimux->is_bigfile) { res = gst_avi_mux_bigfile (avimux, TRUE); } else { res = gst_avi_mux_write_index (avimux); } } /* we do our best to make it interleaved at least ... */ if (avimux->audio_pads > 0 && avimux->video_pads > 0) avimux->avi_hdr.flags |= GST_RIFF_AVIH_ISINTERLEAVED; /* set rate and everything having to do with that */ avimux->avi_hdr.max_bps = 0; node = avimux->sinkpads; while (node) { GstAviPad *avipad = (GstAviPad *) node->data; node = node->next; if (!avipad->is_video) { GstAviAudioPad *audpad = (GstAviAudioPad *) avipad; /* calculate bps if needed */ if (!audpad->auds.av_bps) { if (audpad->audio_time) { audpad->auds.av_bps = (GST_SECOND * audpad->audio_size) / audpad->audio_time; /* round bps to nearest multiple of 8; * which is much more likely to be the (cbr) bitrate in use; * which in turn results in better timestamp calculation on playback */ audpad->auds.av_bps = GST_ROUND_UP_8 (audpad->auds.av_bps - 4); } else { GST_ELEMENT_WARNING (avimux, STREAM, MUX, (_("No or invalid input audio, AVI stream will be corrupt.")), (NULL)); audpad->auds.av_bps = 0; } } gst_avi_mux_audsink_set_fields (avimux, audpad); avimux->avi_hdr.max_bps += audpad->auds.av_bps; avipad->hdr.length = gst_util_uint64_scale (audpad->audio_time, avipad->hdr.rate, avipad->hdr.scale * GST_SECOND); } else { GstAviVideoPad *vidpad = (GstAviVideoPad *) avipad; avimux->avi_hdr.max_bps += ((vidpad->vids.bit_cnt + 7) / 8) * (1000000. / avimux->avi_hdr.us_frame) * vidpad->vids.image_size; avipad->hdr.length = avimux->total_frames; } } /* statistics/total_frames/... */ avimux->avi_hdr.tot_frames = avimux->num_frames; /* seek and rewrite the header */ gst_segment_init (&segment, GST_FORMAT_BYTES); gst_pad_push_event (avimux->srcpad, gst_event_new_segment (&segment)); /* the first error survives */ header = gst_avi_mux_riff_get_avi_header (avimux); if (res == GST_FLOW_OK) res = gst_pad_push (avimux->srcpad, header); else gst_pad_push (avimux->srcpad, header); segment.start = avimux->total_data; segment.time = avimux->total_data; gst_pad_push_event (avimux->srcpad, gst_event_new_segment (&segment)); avimux->write_header = TRUE; return res; } static GstFlowReturn gst_avi_mux_restart_file (GstAviMux * avimux) { GstFlowReturn res; if ((res = gst_avi_mux_stop_file (avimux)) != GST_FLOW_OK) return res; gst_pad_push_event (avimux->srcpad, gst_event_new_eos ()); return gst_avi_mux_start_file (avimux); } /* handle events (search) */ static gboolean gst_avi_mux_handle_event (GstCollectPads * pads, GstCollectData * data, GstEvent * event, gpointer user_data) { GstAviMux *avimux; gboolean ret = TRUE; avimux = GST_AVI_MUX (user_data); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_CAPS: { GstCaps *caps; GstAviCollectData *collect_pad; GstAviVideoPad *avipad; gst_event_parse_caps (event, &caps); /* find stream data */ collect_pad = (GstAviCollectData *) data; g_assert (collect_pad); avipad = (GstAviVideoPad *) collect_pad->avipad; g_assert (avipad); if (avipad->parent.is_video) { ret = gst_avi_mux_vidsink_set_caps (data->pad, caps); } else { ret = gst_avi_mux_audsink_set_caps (data->pad, caps); } gst_event_unref (event); event = NULL; break; } case GST_EVENT_TAG:{ GstTagList *list; GstTagSetter *setter = GST_TAG_SETTER (avimux); const GstTagMergeMode mode = gst_tag_setter_get_tag_merge_mode (setter); gst_event_parse_tag (event, &list); gst_tag_setter_merge_tags (setter, list, mode); gst_event_unref (event); event = NULL; break; } default: break; } if (event != NULL) return gst_collect_pads_event_default (pads, data, event, FALSE); return ret; } /* send extra 'padding' data */ static GstFlowReturn gst_avi_mux_send_pad_data (GstAviMux * avimux, gulong num_bytes) { GstBuffer *buffer; buffer = gst_buffer_new_and_alloc (num_bytes); gst_buffer_memset (buffer, 0, 0, num_bytes); return gst_pad_push (avimux->srcpad, buffer); } /* do buffer */ static GstFlowReturn gst_avi_mux_do_buffer (GstAviMux * avimux, GstAviPad * avipad) { GstFlowReturn res; GstBuffer *data, *header; gulong total_size, pad_bytes = 0; guint flags; gsize datasize; data = gst_collect_pads_pop (avimux->collect, avipad->collect); /* arrange downstream running time */ data = gst_buffer_make_writable (data); GST_BUFFER_TIMESTAMP (data) = gst_segment_to_running_time (&avipad->collect->segment, GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (data)); /* Prepend a special buffer to the first one for some formats */ if (avipad->is_video) { GstAviVideoPad *vidpad = (GstAviVideoPad *) avipad; if (vidpad->prepend_buffer) { GstBuffer *newdata = gst_buffer_append (vidpad->prepend_buffer, gst_buffer_ref (data)); gst_buffer_copy_into (newdata, data, GST_BUFFER_COPY_TIMESTAMPS, 0, -1); gst_buffer_unref (data); data = newdata; vidpad->prepend_buffer = NULL; } } if (avimux->restart) { if ((res = gst_avi_mux_restart_file (avimux)) != GST_FLOW_OK) return res; } datasize = gst_buffer_get_size (data); /* need to restart or start a next avix chunk ? */ if ((avimux->is_bigfile ? avimux->datax_size : avimux->data_size) + datasize > GST_AVI_MAX_SIZE) { if (avimux->enable_large_avi) { if ((res = gst_avi_mux_bigfile (avimux, FALSE)) != GST_FLOW_OK) return res; } else { if ((res = gst_avi_mux_restart_file (avimux)) != GST_FLOW_OK) return res; } } /* get header and record some stats */ if (datasize & 1) { pad_bytes = 2 - (datasize & 1); } header = gst_avi_mux_riff_get_header (avipad, datasize); total_size = gst_buffer_get_size (header) + datasize + pad_bytes; if (avimux->is_bigfile) { avimux->datax_size += total_size; } else { avimux->data_size += total_size; } if (G_UNLIKELY (avipad->hook)) avipad->hook (avimux, avipad, data); /* the suggested buffer size is the max frame size */ if (avipad->hdr.bufsize < datasize) avipad->hdr.bufsize = datasize; if (avipad->is_video) { avimux->total_frames++; if (avimux->is_bigfile) { avimux->numx_frames++; } else { avimux->num_frames++; } flags = 0x02; if (!GST_BUFFER_FLAG_IS_SET (data, GST_BUFFER_FLAG_DELTA_UNIT)) flags |= 0x10; } else { GstAviAudioPad *audpad = (GstAviAudioPad *) avipad; flags = 0; audpad->audio_size += datasize; audpad->audio_time += GST_BUFFER_DURATION (data); } gst_avi_mux_add_index (avimux, avipad, flags, datasize); /* send buffers */ GST_LOG_OBJECT (avimux, "pushing buffers: head, data"); if ((res = gst_pad_push (avimux->srcpad, header)) != GST_FLOW_OK) return res; if ((res = gst_pad_push (avimux->srcpad, data)) != GST_FLOW_OK) return res; if (pad_bytes) { if ((res = gst_avi_mux_send_pad_data (avimux, pad_bytes)) != GST_FLOW_OK) return res; } /* if any push above fails, we're in trouble with file consistency anyway */ avimux->total_data += total_size; avimux->idx_offset += total_size; return res; } /* pick the oldest buffer from the pads and push it */ static GstFlowReturn gst_avi_mux_do_one_buffer (GstAviMux * avimux) { GstAviPad *avipad, *best_pad; GSList *node; GstBuffer *buffer; GstClockTime time, best_time, delay; node = avimux->sinkpads; best_pad = NULL; best_time = GST_CLOCK_TIME_NONE; for (; node; node = node->next) { avipad = (GstAviPad *) node->data; if (!avipad->collect) continue; if (!avipad->hdr.fcc_handler) goto not_negotiated; buffer = gst_collect_pads_peek (avimux->collect, avipad->collect); if (!buffer) continue; time = GST_BUFFER_TIMESTAMP (buffer); gst_buffer_unref (buffer); /* invalid should pass */ if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (time))) { time = gst_segment_to_running_time (&avipad->collect->segment, GST_FORMAT_TIME, time); if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (time))) { GST_DEBUG_OBJECT (avimux, "clipping buffer on pad %s outside segment", GST_PAD_NAME (avipad->collect->pad)); buffer = gst_collect_pads_pop (avimux->collect, avipad->collect); gst_buffer_unref (buffer); return GST_FLOW_OK; } } delay = avipad->is_video ? GST_SECOND / 2 : 0; /* invalid timestamp buffers pass first, * these are probably initialization buffers */ if (best_pad == NULL || !GST_CLOCK_TIME_IS_VALID (time) || (GST_CLOCK_TIME_IS_VALID (best_time) && time + delay < best_time)) { best_pad = avipad; best_time = time + delay; } } if (best_pad) { GST_LOG_OBJECT (avimux, "selected pad %s with time %" GST_TIME_FORMAT, GST_PAD_NAME (best_pad->collect->pad), GST_TIME_ARGS (best_time)); return gst_avi_mux_do_buffer (avimux, best_pad); } else { /* simply finish off the file and send EOS */ gst_avi_mux_stop_file (avimux); gst_pad_push_event (avimux->srcpad, gst_event_new_eos ()); return GST_FLOW_EOS; } /* ERRORS */ not_negotiated: { GST_ELEMENT_ERROR (avimux, CORE, NEGOTIATION, (NULL), ("pad %s not negotiated", GST_PAD_NAME (avipad->collect->pad))); return GST_FLOW_NOT_NEGOTIATED; } } static GstFlowReturn gst_avi_mux_collect_pads (GstCollectPads * pads, GstAviMux * avimux) { GstFlowReturn res; if (G_UNLIKELY (avimux->write_header)) { if ((res = gst_avi_mux_start_file (avimux)) != GST_FLOW_OK) return res; } return gst_avi_mux_do_one_buffer (avimux); } static void gst_avi_mux_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstAviMux *avimux; avimux = GST_AVI_MUX (object); switch (prop_id) { case ARG_BIGFILE: g_value_set_boolean (value, avimux->enable_large_avi); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_avi_mux_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstAviMux *avimux; avimux = GST_AVI_MUX (object); switch (prop_id) { case ARG_BIGFILE: avimux->enable_large_avi = g_value_get_boolean (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static GstStateChangeReturn gst_avi_mux_change_state (GstElement * element, GstStateChange transition) { GstAviMux *avimux; GstStateChangeReturn ret; avimux = GST_AVI_MUX (element); switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: gst_collect_pads_start (avimux->collect); break; case GST_STATE_CHANGE_PAUSED_TO_PLAYING: break; case GST_STATE_CHANGE_PAUSED_TO_READY: gst_collect_pads_stop (avimux->collect); break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); if (ret == GST_STATE_CHANGE_FAILURE) goto done; switch (transition) { case GST_STATE_CHANGE_PLAYING_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_READY: gst_avi_mux_reset (avimux); break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } done: return ret; }