/* GStreamer * Copyright (C) <1999> Erik Walthinsen * Copyright (C) <2006> Nokia Corporation (contact ) * * 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. */ /* Element-Checklist-Version: 5 */ /** * SECTION:element-avidemux * * * * Demuxes an .avi file into raw or compressed audio and/or video streams. * * * This element supports both push and pull-based scheduling, depending on the * capabilities of the upstream elements. * * Example launch line * * * gst-launch filesrc location=test.avi ! avidemux name=demux demux.audio_00 ! decodebin ! audioconvert ! audioresample ! autoaudiosink demux.video_00 ! queue ! decodebin ! ffmpegcolorspace ! videoscale ! autovideosink * * Play (parse and decode) an .avi file and try to output it to * an automatically detected soundcard and videosink. If the AVI file contains * compressed audio or video data, this will only work if you have the * right decoder elements/plugins installed. * * * * Last reviewed on 2006-12-29 (0.10.6) */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gst/riff/riff-media.h" #include "gstavidemux.h" #include "avi-ids.h" #include #include GST_DEBUG_CATEGORY_STATIC (avidemux_debug); #define GST_CAT_DEFAULT avidemux_debug GST_DEBUG_CATEGORY_EXTERN (GST_CAT_EVENT); static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-msvideo") ); static void gst_avi_demux_base_init (GstAviDemuxClass * klass); static void gst_avi_demux_class_init (GstAviDemuxClass * klass); static void gst_avi_demux_init (GstAviDemux * avi); static void gst_avi_demux_finalize (GObject * object); static void gst_avi_demux_reset (GstAviDemux * avi); #if 0 static const GstEventMask *gst_avi_demux_get_event_mask (GstPad * pad); #endif static gboolean gst_avi_demux_handle_src_event (GstPad * pad, GstEvent * event); #if 0 static const GstFormat *gst_avi_demux_get_src_formats (GstPad * pad); #endif static const GstQueryType *gst_avi_demux_get_src_query_types (GstPad * pad); static gboolean gst_avi_demux_handle_src_query (GstPad * pad, GstQuery * query); static gboolean gst_avi_demux_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value); static gboolean gst_avi_demux_do_seek (GstAviDemux * avi, GstSegment * segment); static gboolean gst_avi_demux_handle_seek (GstAviDemux * avi, GstPad * pad, GstEvent * event); static void gst_avi_demux_loop (GstPad * pad); static gboolean gst_avi_demux_sink_activate (GstPad * sinkpad); static gboolean gst_avi_demux_sink_activate_pull (GstPad * sinkpad, gboolean active); static gboolean gst_avi_demux_activate_push (GstPad * pad, gboolean active); static GstFlowReturn gst_avi_demux_chain (GstPad * pad, GstBuffer * buf); static GstStateChangeReturn gst_avi_demux_change_state (GstElement * element, GstStateChange transition); static GstElementClass *parent_class = NULL; /* GObject methods */ GType gst_avi_demux_get_type (void) { static GType avi_demux_type = 0; if (!avi_demux_type) { static const GTypeInfo avi_demux_info = { sizeof (GstAviDemuxClass), (GBaseInitFunc) gst_avi_demux_base_init, NULL, (GClassInitFunc) gst_avi_demux_class_init, NULL, NULL, sizeof (GstAviDemux), 0, (GInstanceInitFunc) gst_avi_demux_init, }; avi_demux_type = g_type_register_static (GST_TYPE_ELEMENT, "GstAviDemux", &avi_demux_info, 0); } return avi_demux_type; } static void gst_avi_demux_base_init (GstAviDemuxClass * klass) { static const GstElementDetails gst_avi_demux_details = GST_ELEMENT_DETAILS ("Avi demuxer", "Codec/Demuxer", "Demultiplex an avi file into audio and video", "Erik Walthinsen \n" "Wim Taymans \n" "Ronald Bultje \n" "Thijs Vermeir "); GstElementClass *element_class = GST_ELEMENT_CLASS (klass); GstPadTemplate *videosrctempl, *audiosrctempl, *subsrctempl; GstCaps *audcaps, *vidcaps, *subcaps; audcaps = gst_riff_create_audio_template_caps (); gst_caps_append (audcaps, gst_caps_new_simple ("audio/x-avi-unknown", NULL)); audiosrctempl = gst_pad_template_new ("audio_%02d", GST_PAD_SRC, GST_PAD_SOMETIMES, audcaps); vidcaps = gst_riff_create_video_template_caps (); gst_caps_append (vidcaps, gst_riff_create_iavs_template_caps ()); gst_caps_append (vidcaps, gst_caps_new_simple ("video/x-avi-unknown", NULL)); videosrctempl = gst_pad_template_new ("video_%02d", GST_PAD_SRC, GST_PAD_SOMETIMES, vidcaps); subcaps = gst_caps_new_simple ("application/x-subtitle-avi", NULL); subsrctempl = gst_pad_template_new ("subtitle_%02d", GST_PAD_SRC, GST_PAD_SOMETIMES, subcaps); gst_element_class_add_pad_template (element_class, audiosrctempl); gst_element_class_add_pad_template (element_class, videosrctempl); gst_element_class_add_pad_template (element_class, subsrctempl); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&sink_templ)); gst_element_class_set_details (element_class, &gst_avi_demux_details); } static void gst_avi_demux_class_init (GstAviDemuxClass * klass) { GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass); GObjectClass *gobject_class = (GObjectClass *) klass; GST_DEBUG_CATEGORY_INIT (avidemux_debug, "avidemux", 0, "Demuxer for AVI streams"); parent_class = g_type_class_peek_parent (klass); gobject_class->finalize = gst_avi_demux_finalize; gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_avi_demux_change_state); } static void gst_avi_demux_init (GstAviDemux * avi) { avi->sinkpad = gst_pad_new_from_static_template (&sink_templ, "sink"); gst_pad_set_activate_function (avi->sinkpad, gst_avi_demux_sink_activate); gst_pad_set_activatepull_function (avi->sinkpad, gst_avi_demux_sink_activate_pull); gst_pad_set_activatepush_function (avi->sinkpad, gst_avi_demux_activate_push); gst_pad_set_chain_function (avi->sinkpad, gst_avi_demux_chain); gst_element_add_pad (GST_ELEMENT (avi), avi->sinkpad); avi->adapter = gst_adapter_new (); gst_avi_demux_reset (avi); } static void gst_avi_demux_finalize (GObject * object) { GstAviDemux *avi = GST_AVI_DEMUX (object); GST_DEBUG ("AVI: finalize"); g_object_unref (avi->adapter); G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_avi_demux_reset (GstAviDemux * avi) { gint i; GST_DEBUG ("AVI: reset"); for (i = 0; i < avi->num_streams; i++) { g_free (avi->stream[i].strh); g_free (avi->stream[i].strf.data); if (avi->stream[i].name) g_free (avi->stream[i].name); if (avi->stream[i].initdata) gst_buffer_unref (avi->stream[i].initdata); if (avi->stream[i].extradata) gst_buffer_unref (avi->stream[i].extradata); if (avi->stream[i].pad) { gst_pad_set_active (avi->stream[i].pad, FALSE); gst_element_remove_pad (GST_ELEMENT (avi), avi->stream[i].pad); } if (avi->stream[i].taglist) { gst_tag_list_free (avi->stream[i].taglist); avi->stream[i].taglist = NULL; } } memset (&avi->stream, 0, sizeof (avi->stream)); avi->num_streams = 0; avi->num_v_streams = 0; avi->num_a_streams = 0; avi->num_t_streams = 0; avi->state = GST_AVI_DEMUX_START; avi->offset = 0; g_free (avi->index_entries); avi->index_entries = NULL; avi->index_size = 0; avi->index_offset = 0; avi->current_entry = 0; g_free (avi->avih); avi->avih = NULL; if (avi->seek_event) { gst_event_unref (avi->seek_event); avi->seek_event = NULL; } if (avi->globaltags) gst_tag_list_free (avi->globaltags); avi->globaltags = NULL; avi->got_tags = FALSE; avi->have_eos = FALSE; gst_adapter_clear (avi->adapter); gst_segment_init (&avi->segment, GST_FORMAT_TIME); } /* Index helper */ static gst_avi_index_entry * gst_avi_demux_index_last (GstAviDemux * avi, gint stream_nr) { gint i; gst_avi_index_entry *result = NULL; for (i = avi->index_size - 1; i >= 0; i--) { if (avi->index_entries[i].stream_nr == stream_nr) { result = &avi->index_entries[i]; break; } } return result; } static gst_avi_index_entry * gst_avi_demux_index_next (GstAviDemux * avi, gint stream_nr, gint last, guchar flags) { gint i; gst_avi_index_entry *result = NULL, *entry; for (i = last + 1; i < avi->index_size; i++) { entry = &avi->index_entries[i]; if (entry->stream_nr != stream_nr) continue; if ((entry->flags & flags) == flags) { result = entry; break; } } return result; } static gst_avi_index_entry * gst_avi_demux_index_prev (GstAviDemux * avi, gint stream_nr, gint last, guchar flags) { gint i; gst_avi_index_entry *result = NULL, *entry; for (i = last - 1; i >= 0; i--) { entry = &avi->index_entries[i]; if (entry->stream_nr != stream_nr) continue; if ((entry->flags & flags) == flags) { result = entry; break; } } return result; } /* * gst_avi_index_entry: * @avi: Avi object * @stream_nr: stream number * @time: seek time position * * Finds the index entry which time is less or equal than the requested time. * * Returns: the found index entry or %NULL */ static gst_avi_index_entry * gst_avi_demux_index_entry_for_time (GstAviDemux * avi, gint stream_nr, guint64 time) { gst_avi_index_entry *entry = NULL, *last_entry = NULL; gint i; GST_LOG_OBJECT (avi, "stream_nr:%d , time:%" GST_TIME_FORMAT, stream_nr, GST_TIME_ARGS (time)); for (i = 0; i < avi->index_size; i++) { entry = &avi->index_entries[i]; if (entry->stream_nr != stream_nr) continue; if (entry->ts > time) break; last_entry = entry; GST_LOG_OBJECT (avi, "best at entry %d / ts:%" GST_TIME_FORMAT " / dur:%" GST_TIME_FORMAT " flags:%02x", i, GST_TIME_ARGS (entry->ts), GST_TIME_ARGS (entry->dur), entry->flags); } return last_entry; } /* GstElement methods */ #if 0 static const GstFormat * gst_avi_demux_get_src_formats (GstPad * pad) { avi_stream_context *stream = gst_pad_get_element_private (pad); static const GstFormat src_a_formats[] = { GST_FORMAT_TIME, GST_FORMAT_BYTES, GST_FORMAT_DEFAULT, 0 }; static const GstFormat src_v_formats[] = { GST_FORMAT_TIME, GST_FORMAT_DEFAULT, 0 }; return (stream->strh->type == GST_RIFF_FCC_auds ? src_a_formats : src_v_formats); } #endif static gboolean gst_avi_demux_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value) { gboolean res = TRUE; GstAviDemux *avidemux = GST_AVI_DEMUX (GST_PAD_PARENT (pad)); avi_stream_context *stream = gst_pad_get_element_private (pad); GST_LOG_OBJECT (avidemux, "Received src_format:%s, src_value:%" G_GUINT64_FORMAT ", dest_format:%s", gst_format_get_name (src_format), src_value, gst_format_get_name (*dest_format)); if (src_format == *dest_format) { *dest_value = src_value; goto done; } if (!stream->strh || !stream->strf.data) { res = FALSE; goto done; } if (stream->strh->type == GST_RIFF_FCC_vids && (src_format == GST_FORMAT_BYTES || *dest_format == GST_FORMAT_BYTES)) { res = FALSE; goto done; } switch (src_format) { case GST_FORMAT_TIME: switch (*dest_format) { case GST_FORMAT_BYTES: *dest_value = gst_util_uint64_scale (src_value, (guint64) stream->strf.auds->av_bps, GST_SECOND); break; case GST_FORMAT_DEFAULT: *dest_value = gst_util_uint64_scale (src_value, stream->strh->rate, stream->strh->scale * GST_SECOND); break; default: res = FALSE; break; } break; case GST_FORMAT_BYTES: switch (*dest_format) { case GST_FORMAT_TIME: if (stream->strf.auds->av_bps != 0) { *dest_value = gst_util_uint64_scale (src_value, GST_SECOND, (guint64) stream->strf.auds->av_bps); } else res = FALSE; break; default: res = FALSE; break; } break; case GST_FORMAT_DEFAULT: switch (*dest_format) { case GST_FORMAT_TIME: *dest_value = gst_util_uint64_scale (src_value, stream->strh->scale * GST_SECOND, (guint64) stream->strh->rate); break; default: res = FALSE; break; } break; default: res = FALSE; } done: GST_LOG_OBJECT (avidemux, "Returning res:%d dest_format:%s dest_value:%" G_GUINT64_FORMAT, res, gst_format_get_name (*dest_format), *dest_value); return res; } static const GstQueryType * gst_avi_demux_get_src_query_types (GstPad * pad) { static const GstQueryType src_types[] = { GST_QUERY_POSITION, GST_QUERY_DURATION, GST_QUERY_SEEKING, 0 }; return src_types; } static gboolean gst_avi_demux_handle_src_query (GstPad * pad, GstQuery * query) { gboolean res = TRUE; GstAviDemux *avi = GST_AVI_DEMUX (gst_pad_get_parent (pad)); avi_stream_context *stream = gst_pad_get_element_private (pad); if (!stream->strh || !stream->strf.data) return gst_pad_query_default (pad, query); switch (GST_QUERY_TYPE (query)) { case GST_QUERY_POSITION:{ gint64 pos = 0; GST_DEBUG ("pos query for stream %d: frames %d, bytes %" G_GUINT64_FORMAT, stream->num, stream->current_frame, stream->current_byte); if (stream->strh->type == GST_RIFF_FCC_auds) { if (stream->is_vbr) { /* VBR */ pos = gst_util_uint64_scale ((gint64) stream->current_frame * stream->strh->scale, GST_SECOND, (guint64) stream->strh->rate); GST_DEBUG_OBJECT (avi, "VBR convert frame %u, time %" GST_TIME_FORMAT, stream->current_frame, GST_TIME_ARGS (pos)); } else if (stream->strf.auds->av_bps != 0) { /* CBR */ pos = gst_util_uint64_scale (stream->current_byte, GST_SECOND, (guint64) stream->strf.auds->av_bps); GST_DEBUG_OBJECT (avi, "CBR convert bytes %" G_GUINT64_FORMAT ", time %" GST_TIME_FORMAT, stream->current_byte, GST_TIME_ARGS (pos)); } else if (stream->total_frames != 0 && stream->total_bytes != 0) { /* calculate timestamps based on percentage of length */ guint64 xlen = avi->avih->us_frame * avi->avih->tot_frames * GST_USECOND; if (stream->is_vbr) { pos = gst_util_uint64_scale (xlen, stream->current_frame, stream->total_frames); GST_DEBUG_OBJECT (avi, "VBR perc convert frame %u, time %" GST_TIME_FORMAT, stream->current_frame, GST_TIME_ARGS (pos)); } else { pos = gst_util_uint64_scale (xlen, stream->current_byte, stream->total_bytes); GST_DEBUG_OBJECT (avi, "CBR perc convert bytes %" G_GUINT64_FORMAT ", time %" GST_TIME_FORMAT, stream->current_byte, GST_TIME_ARGS (pos)); } } else { /* we don't know */ res = FALSE; } } else { if (stream->strh->rate != 0) { pos = gst_util_uint64_scale ((guint64) stream->current_frame * stream->strh->scale, GST_SECOND, (guint64) stream->strh->rate); } else { pos = stream->current_frame * avi->avih->us_frame * GST_USECOND; } } if (res) { GST_DEBUG ("pos query : %" GST_TIME_FORMAT, GST_TIME_ARGS (pos)); gst_query_set_position (query, GST_FORMAT_TIME, pos); } else GST_WARNING ("pos query failed"); break; } case GST_QUERY_DURATION: { if (stream->strh->type != GST_RIFF_FCC_auds && stream->strh->type != GST_RIFF_FCC_vids) { res = FALSE; break; } gst_query_set_duration (query, GST_FORMAT_TIME, stream->duration); break; } case GST_QUERY_SEEKING:{ GstFormat fmt; gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL); if (fmt == GST_FORMAT_TIME) { gboolean seekable = TRUE; if (avi->streaming) { seekable = FALSE; } else { if (avi->index_entries == NULL) { seekable = FALSE; /* FIXME: when building index_entried, count keyframes if (!(avi->key_frame_ct > 1)) seekable = FALSE; */ } } gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, stream->duration); res = TRUE; } break; } default: res = gst_pad_query_default (pad, query); break; } gst_object_unref (avi); return res; } #if 0 static const GstEventMask * gst_avi_demux_get_event_mask (GstPad * pad) { static const GstEventMask masks[] = { {GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_KEY_UNIT}, {0,} }; return masks; } #endif static gboolean gst_avi_demux_handle_src_event (GstPad * pad, GstEvent * event) { gboolean res = TRUE; GstAviDemux *avi = GST_AVI_DEMUX (gst_pad_get_parent (pad)); GST_DEBUG_OBJECT (avi, "have event type %s: %p on src pad", GST_EVENT_TYPE_NAME (event), event); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEEK: /* handle seeking */ res = gst_avi_demux_handle_seek (avi, pad, event); gst_event_unref (event); break; case GST_EVENT_QOS: case GST_EVENT_NAVIGATION: res = FALSE; gst_event_unref (event); break; default: res = gst_pad_event_default (pad, event); break; } gst_object_unref (avi); return res; } /* streaming helper (push) */ /* * gst_avi_demux_peek_chunk_info: * @avi: Avi object * @tag: holder for tag * @size: holder for tag size * * Peek next chunk info (tag and size) * * Returns: TRUE when one chunk info has been got */ static gboolean gst_avi_demux_peek_chunk_info (GstAviDemux * avi, guint32 * tag, guint32 * size) { const guint8 *data = NULL; if (gst_adapter_available (avi->adapter) < 8) { return FALSE; } data = gst_adapter_peek (avi->adapter, 8); *tag = GST_READ_UINT32_LE (data); *size = GST_READ_UINT32_LE (data + 4); return TRUE; } /* * gst_avi_demux_peek_chunk: * @avi: Avi object * @tag: holder for tag * @size: holder for tag size * * Peek enough data for one full chunk * * Returns: %TRUE when one chunk has been got */ static gboolean gst_avi_demux_peek_chunk (GstAviDemux * avi, guint32 * tag, guint32 * size) { guint32 peek_size = 0; gint available; if (!gst_avi_demux_peek_chunk_info (avi, tag, size)) { return FALSE; } /* FIXME: shouldn't this check go to gst_avi_demux_peek_chunk_info() already */ if (!(*size) || (*size) == -1) { GST_INFO ("Invalid chunk size %d for tag %" GST_FOURCC_FORMAT, *size, GST_FOURCC_ARGS (*tag)); return FALSE; } peek_size = (*size + 1) & ~1; available = gst_adapter_available (avi->adapter); GST_DEBUG ("Need to peek chunk of %d bytes to read chunk %" GST_FOURCC_FORMAT ", %d bytes available", *size, GST_FOURCC_ARGS (*tag), available); if (available >= (8 + peek_size)) { return TRUE; } else { return FALSE; } } /* AVI init */ /* * gst_avi_demux_parse_file_header: * @element: caller element (used for errors/debug). * @buf: input data to be used for parsing. * * "Open" a RIFF/AVI file. The buffer should be at least 12 * bytes long. Takes ownership of @buf. * * Returns: TRUE if the file is a RIFF/AVI file, FALSE otherwise. * Throws an error, caller should error out (fatal). */ static gboolean gst_avi_demux_parse_file_header (GstElement * element, GstBuffer * buf) { guint32 doctype; /* riff_parse posts an error */ if (!gst_riff_parse_file_header (element, buf, &doctype)) return FALSE; if (doctype != GST_RIFF_RIFF_AVI) goto not_avi; return TRUE; /* ERRORS */ not_avi: { GST_ELEMENT_ERROR (element, STREAM, WRONG_TYPE, (NULL), ("File is not an AVI file: %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (doctype))); return FALSE; } } /* * Read AVI file tag when streaming */ static GstFlowReturn gst_avi_demux_stream_init_push (GstAviDemux * avi) { if (gst_adapter_available (avi->adapter) >= 12) { GstBuffer *tmp; tmp = gst_adapter_take_buffer (avi->adapter, 12); GST_DEBUG ("Parsing avi header"); if (!gst_avi_demux_parse_file_header (GST_ELEMENT (avi), tmp)) { return GST_FLOW_ERROR; } GST_DEBUG ("header ok"); avi->offset += 12; avi->state = GST_AVI_DEMUX_HEADER; } return GST_FLOW_OK; } /* * Read AVI file tag */ static GstFlowReturn gst_avi_demux_stream_init_pull (GstAviDemux * avi) { GstFlowReturn res; GstBuffer *buf = NULL; res = gst_pad_pull_range (avi->sinkpad, avi->offset, 12, &buf); if (res != GST_FLOW_OK) return res; else if (!gst_avi_demux_parse_file_header (GST_ELEMENT_CAST (avi), buf)) goto wrong_header; avi->offset += 12; return GST_FLOW_OK; /* ERRORS */ wrong_header: { GST_DEBUG_OBJECT (avi, "error parsing file header"); return GST_FLOW_ERROR; } } /* AVI header handling */ /* * gst_avi_demux_parse_avih: * @element: caller element (used for errors/debug). * @buf: input data to be used for parsing. * @avih: pointer to structure (filled in by function) containing * stream information (such as flags, number of streams, etc.). * * Read 'avih' header. Discards buffer after use. * * Returns: TRUE on success, FALSE otherwise. Throws an error if * the header is invalid. The caller should error out * (fatal). */ static gboolean gst_avi_demux_parse_avih (GstElement * element, GstBuffer * buf, gst_riff_avih ** _avih) { gst_riff_avih *avih; if (buf == NULL) goto no_buffer; if (GST_BUFFER_SIZE (buf) < sizeof (gst_riff_avih)) goto avih_too_small; avih = g_memdup (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf)); #if (G_BYTE_ORDER == G_BIG_ENDIAN) avih->us_frame = GUINT32_FROM_LE (avih->us_frame); avih->max_bps = GUINT32_FROM_LE (avih->max_bps); avih->pad_gran = GUINT32_FROM_LE (avih->pad_gran); avih->flags = GUINT32_FROM_LE (avih->flags); avih->tot_frames = GUINT32_FROM_LE (avih->tot_frames); avih->init_frames = GUINT32_FROM_LE (avih->init_frames); avih->streams = GUINT32_FROM_LE (avih->streams); avih->bufsize = GUINT32_FROM_LE (avih->bufsize); avih->width = GUINT32_FROM_LE (avih->width); avih->height = GUINT32_FROM_LE (avih->height); avih->scale = GUINT32_FROM_LE (avih->scale); avih->rate = GUINT32_FROM_LE (avih->rate); avih->start = GUINT32_FROM_LE (avih->start); avih->length = GUINT32_FROM_LE (avih->length); #endif /* debug stuff */ GST_INFO_OBJECT (element, "avih tag found:"); GST_INFO_OBJECT (element, " us_frame %u", avih->us_frame); GST_INFO_OBJECT (element, " max_bps %u", avih->max_bps); GST_INFO_OBJECT (element, " pad_gran %u", avih->pad_gran); GST_INFO_OBJECT (element, " flags 0x%08x", avih->flags); GST_INFO_OBJECT (element, " tot_frames %u", avih->tot_frames); GST_INFO_OBJECT (element, " init_frames %u", avih->init_frames); GST_INFO_OBJECT (element, " streams %u", avih->streams); GST_INFO_OBJECT (element, " bufsize %u", avih->bufsize); GST_INFO_OBJECT (element, " width %u", avih->width); GST_INFO_OBJECT (element, " height %u", avih->height); GST_INFO_OBJECT (element, " scale %u", avih->scale); GST_INFO_OBJECT (element, " rate %u", avih->rate); GST_INFO_OBJECT (element, " start %u", avih->start); GST_INFO_OBJECT (element, " length %u", avih->length); *_avih = avih; gst_buffer_unref (buf); return TRUE; /* ERRORS */ no_buffer: { GST_ELEMENT_ERROR (element, STREAM, DEMUX, (NULL), ("No buffer")); return FALSE; } avih_too_small: { GST_ELEMENT_ERROR (element, STREAM, DEMUX, (NULL), ("Too small avih (%d available, %d needed)", GST_BUFFER_SIZE (buf), (int) sizeof (gst_riff_avih))); gst_buffer_unref (buf); return FALSE; } } /* * gst_avi_demux_parse_superindex: * @avi: caller element (used for debugging/errors). * @buf: input data to use for parsing. * @locations: locations in the file (byte-offsets) that contain * the actual indexes (see get_avi_demux_parse_subindex()). * The array ends with GST_BUFFER_OFFSET_NONE. * * Reads superindex (openDML-2 spec stuff) from the provided data. * * Returns: TRUE on success, FALSE otherwise. Indexes should be skipped * on error, but they are not fatal. */ static gboolean gst_avi_demux_parse_superindex (GstAviDemux * avi, GstBuffer * buf, guint64 ** _indexes) { guint8 *data; guint16 bpe = 16; guint32 num, i; guint64 *indexes; guint size; *_indexes = NULL; size = buf ? GST_BUFFER_SIZE (buf) : 0; if (size < 24) goto too_small; data = GST_BUFFER_DATA (buf); /* check type of index. The opendml2 specs state that * there should be 4 dwords per array entry. Type can be * either frame or field (and we don't care). */ if (GST_READ_UINT16_LE (data) != 4 || (data[2] & 0xfe) != 0x0 || data[3] != 0x0) { GST_WARNING_OBJECT (avi, "Superindex for stream has unexpected " "size_entry %d (bytes) or flags 0x%02x/0x%02x", GST_READ_UINT16_LE (data), data[2], data[3]); bpe = GST_READ_UINT16_LE (data) * 4; } num = GST_READ_UINT32_LE (&data[4]); indexes = g_new (guint64, num + 1); for (i = 0; i < num; i++) { if (size < 24 + bpe * (i + 1)) break; indexes[i] = GST_READ_UINT64_LE (&data[24 + bpe * i]); } indexes[i] = GST_BUFFER_OFFSET_NONE; *_indexes = indexes; gst_buffer_unref (buf); return TRUE; /* ERRORS */ too_small: { GST_ERROR_OBJECT (avi, "Not enough data to parse superindex (%d available, 24 needed)", size); if (buf) gst_buffer_unref (buf); return FALSE; } } /* * gst_avi_demux_parse_subindex: * @avi: Avi object * @buf: input data to use for parsing. * @stream: stream context. * @entries_list: a list (returned by the function) containing all the * indexes parsed in this specific subindex. The first * entry is also a pointer to allocated memory that needs * to be free´ed. May be NULL if no supported indexes were * found. * * Reads superindex (openDML-2 spec stuff) from the provided data. * The buffer will be discarded after use. * * Returns: TRUE on success, FALSE otherwise. Errors are fatal, we * throw an error, caller should bail out asap. */ static gboolean gst_avi_demux_parse_subindex (GstAviDemux * avi, GstBuffer * buf, avi_stream_context * stream, GList ** _entries_list) { guint8 *data = GST_BUFFER_DATA (buf); guint16 bpe; guint32 num, i; guint64 baseoff; gst_avi_index_entry *entries, *entry; GList *entries_list = NULL; GstFormat format = GST_FORMAT_TIME; guint size; *_entries_list = NULL; size = buf ? GST_BUFFER_SIZE (buf) : 0; /* check size */ if (size < 24) goto too_small; /* We don't support index-data yet */ if (data[3] & 0x80) goto not_implemented; /* check type of index. The opendml2 specs state that * there should be 4 dwords per array entry. Type can be * either frame or field (and we don't care). */ bpe = (data[2] & 0x01) ? 12 : 8; if (GST_READ_UINT16_LE (data) != bpe / 4 || (data[2] & 0xfe) != 0x0 || data[3] != 0x1) { GST_WARNING_OBJECT (avi, "Superindex for stream %d has unexpected " "size_entry %d (bytes) or flags 0x%02x/0x%02x", stream->num, GST_READ_UINT16_LE (data), data[2], data[3]); bpe = GST_READ_UINT16_LE (data) * 4; } num = GST_READ_UINT32_LE (&data[4]); baseoff = GST_READ_UINT64_LE (&data[12]); /* If there's nothing, just return ! */ if (num == 0) return TRUE; if (!(entries = g_try_new (gst_avi_index_entry, num))) goto out_of_mem; for (i = 0; i < num; i++) { gint64 next_ts; entry = &entries[i]; if (size < 24 + bpe * (i + 1)) break; /* fill in */ entry->offset = baseoff + GST_READ_UINT32_LE (&data[24 + bpe * i]); entry->size = GST_READ_UINT32_LE (&data[24 + bpe * i + 4]); entry->flags = (entry->size & 0x80000000) ? 0 : GST_AVI_INDEX_ENTRY_FLAG_KEYFRAME; entry->size &= ~0x80000000; entry->index_nr = i; entry->stream_nr = stream->num; /* stream duration unknown, now we can calculate it */ if (stream->idx_duration == -1) stream->idx_duration = 0; /* timestamps */ entry->ts = stream->idx_duration; if (stream->is_vbr) { /* VBR get next timestamp */ gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT, stream->total_frames + 1, &format, &next_ts); } else { /* CBR get next timestamp */ gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES, stream->total_bytes + entry->size, &format, &next_ts); } /* duration is next - current */ entry->dur = next_ts - entry->ts; /* stream position */ entry->bytes_before = stream->total_bytes; entry->frames_before = stream->total_frames; stream->total_bytes += entry->size; stream->total_frames++; stream->idx_duration = next_ts; entries_list = g_list_prepend (entries_list, entry); } GST_LOG_OBJECT (avi, "Read %d index entries", i); gst_buffer_unref (buf); if (i > 0) { *_entries_list = g_list_reverse (entries_list); } else { g_free (entries); } return TRUE; /* ERRORS */ too_small: { GST_ERROR_OBJECT (avi, "Not enough data to parse subindex (%d available, 24 needed)", size); if (buf) gst_buffer_unref (buf); return TRUE; /* continue */ } not_implemented: { GST_ELEMENT_ERROR (avi, STREAM, NOT_IMPLEMENTED, (NULL), ("Subindex-is-data is not implemented")); gst_buffer_unref (buf); return FALSE; } out_of_mem: { GST_ELEMENT_ERROR (avi, RESOURCE, NO_SPACE_LEFT, (NULL), ("Cannot allocate memory for %u*%u=%u bytes", (guint) sizeof (gst_avi_index_entry), num, (guint) sizeof (gst_avi_index_entry) * num)); gst_buffer_unref (buf); return FALSE; } } #if 0 /* * Read AVI index when streaming */ static void gst_avi_demux_read_subindexes_push (GstAviDemux * avi, GList ** index, GList ** alloc_list) { GList *list = NULL; guint32 tag = 0, size; GstBuffer *buf = NULL; gint i, n; GST_DEBUG_OBJECT (avi, "gst_avi_demux_read_subindexes_push for %d streams", avi->num_streams); for (n = 0; n < avi->num_streams; n++) { avi_stream_context *stream = &avi->stream[n]; for (i = 0; stream->indexes[i] != GST_BUFFER_OFFSET_NONE; i++) { if (!gst_avi_demux_peek_chunk (avi, &tag, &size)) continue; else if (tag != GST_MAKE_FOURCC ('i', 'x', '0' + stream->num / 10, '0' + stream->num % 10)) { GST_WARNING_OBJECT (avi, "Not an ix## chunk (%" GST_FOURCC_FORMAT ")", GST_FOURCC_ARGS (tag)); continue; } avi->offset += 8 + ((size + 1) & ~1); buf = gst_buffer_new (); GST_BUFFER_DATA (buf) = gst_adapter_take (avi->adapter, size); GST_BUFFER_SIZE (buf) = size; if (!gst_avi_demux_parse_subindex (avi, buf, stream, &list)) continue; if (list) { GST_DEBUG_OBJECT (avi, " adding %d entries", g_list_length (list)); *alloc_list = g_list_append (*alloc_list, list->data); *index = g_list_concat (*index, list); } } g_free (stream->indexes); stream->indexes = NULL; } GST_DEBUG_OBJECT (avi, "index %s", ((*index) ? "!= 0" : "== 0")); } #endif /* * Read AVI index */ static void gst_avi_demux_read_subindexes_pull (GstAviDemux * avi, GList ** index, GList ** alloc_list) { GList *list = NULL; guint32 tag; GstBuffer *buf; gint i, n; GST_DEBUG_OBJECT (avi, "gst_avi_demux_read_subindexes_pull for %d streams", avi->num_streams); for (n = 0; n < avi->num_streams; n++) { avi_stream_context *stream = &avi->stream[n]; for (i = 0; stream->indexes[i] != GST_BUFFER_OFFSET_NONE; i++) { if (gst_riff_read_chunk (GST_ELEMENT (avi), avi->sinkpad, &stream->indexes[i], &tag, &buf) != GST_FLOW_OK) continue; else if (tag != GST_MAKE_FOURCC ('i', 'x', '0' + stream->num / 10, '0' + stream->num % 10)) { GST_WARNING_OBJECT (avi, "Not an ix## chunk (%" GST_FOURCC_FORMAT ")", GST_FOURCC_ARGS (tag)); gst_buffer_unref (buf); continue; } if (!gst_avi_demux_parse_subindex (avi, buf, stream, &list)) continue; if (list) { GST_DEBUG_OBJECT (avi, " adding %5d entries, total %2d %5d", g_list_length (list), g_list_length (*alloc_list), g_list_length (*index)); *alloc_list = g_list_append (*alloc_list, list->data); *index = g_list_concat (*index, list); } } g_free (stream->indexes); stream->indexes = NULL; } GST_DEBUG_OBJECT (avi, "index %s", ((*index) ? "!= 0" : "== 0")); } /* * gst_avi_demux_riff_parse_vprp: * @element: caller element (used for debugging/error). * @buf: input data to be used for parsing, stripped from header. * @vprp: a pointer (returned by this function) to a filled-in vprp * structure. Caller should free it. * * Parses a video stream´s vprp. This function takes ownership of @buf. * * Returns: TRUE if parsing succeeded, otherwise FALSE. The stream * should be skipped on error, but it is not fatal. */ static gboolean gst_avi_demux_riff_parse_vprp (GstElement * element, GstBuffer * buf, gst_riff_vprp ** _vprp) { gst_riff_vprp *vprp; gint k; g_return_val_if_fail (buf != NULL, FALSE); g_return_val_if_fail (_vprp != NULL, FALSE); if (GST_BUFFER_SIZE (buf) < G_STRUCT_OFFSET (gst_riff_vprp, field_info)) goto too_small; vprp = g_memdup (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf)); #if (G_BYTE_ORDER == G_BIG_ENDIAN) vprp->format_token = GUINT32_FROM_LE (vprp->format_token); vprp->standard = GUINT32_FROM_LE (vprp->standard); vprp->vert_rate = GUINT32_FROM_LE (vprp->vert_rate); vprp->hor_t_total = GUINT32_FROM_LE (vprp->hor_t_total); vprp->vert_lines = GUINT32_FROM_LE (vprp->vert_lines); vprp->aspect = GUINT32_FROM_LE (vprp->aspect); vprp->width = GUINT32_FROM_LE (vprp->width); vprp->height = GUINT32_FROM_LE (vprp->height); vprp->fields = GUINT32_FROM_LE (vprp->fields); #endif /* size checking */ /* calculate fields based on size */ k = (GST_BUFFER_SIZE (buf) - G_STRUCT_OFFSET (gst_riff_vprp, field_info)) / vprp->fields; if (vprp->fields > k) { GST_WARNING_OBJECT (element, "vprp header indicated %d fields, only %d available", vprp->fields, k); vprp->fields = k; } if (vprp->fields > GST_RIFF_VPRP_VIDEO_FIELDS) { GST_WARNING_OBJECT (element, "vprp header indicated %d fields, at most %d supported", vprp->fields, GST_RIFF_VPRP_VIDEO_FIELDS); vprp->fields = GST_RIFF_VPRP_VIDEO_FIELDS; } #if (G_BYTE_ORDER == G_BIG_ENDIAN) for (k = 0; k < vprp->fields; k++) { gst_riff_vprp_video_field_desc *fd; fd = &vprp->field_info[k]; fd->compressed_bm_height = GUINT32_FROM_LE (fd->compressed_bm_height); fd->compressed_bm_width = GUINT32_FROM_LE (fd->compressed_bm_width); fd->valid_bm_height = GUINT32_FROM_LE (fd->valid_bm_height); fd->valid_bm_width = GUINT16_FROM_LE (fd->valid_bm_width); fd->valid_bm_x_offset = GUINT16_FROM_LE (fd->valid_bm_x_offset); fd->valid_bm_y_offset = GUINT32_FROM_LE (fd->valid_bm_y_offset); fd->video_x_t_offset = GUINT32_FROM_LE (fd->video_x_t_offset); fd->video_y_start = GUINT32_FROM_LE (fd->video_y_start); } #endif /* debug */ GST_INFO_OBJECT (element, "vprp tag found in context vids:"); GST_INFO_OBJECT (element, " format_token %d", vprp->format_token); GST_INFO_OBJECT (element, " standard %d", vprp->standard); GST_INFO_OBJECT (element, " vert_rate %d", vprp->vert_rate); GST_INFO_OBJECT (element, " hor_t_total %d", vprp->hor_t_total); GST_INFO_OBJECT (element, " vert_lines %d", vprp->vert_lines); GST_INFO_OBJECT (element, " aspect %d:%d", vprp->aspect >> 16, vprp->aspect & 0xffff); GST_INFO_OBJECT (element, " width %d", vprp->width); GST_INFO_OBJECT (element, " height %d", vprp->height); GST_INFO_OBJECT (element, " fields %d", vprp->fields); for (k = 0; k < vprp->fields; k++) { gst_riff_vprp_video_field_desc *fd; fd = &(vprp->field_info[k]); GST_INFO_OBJECT (element, " field %u description:", k); GST_INFO_OBJECT (element, " compressed_bm_height %d", fd->compressed_bm_height); GST_INFO_OBJECT (element, " compressed_bm_width %d", fd->compressed_bm_width); GST_INFO_OBJECT (element, " valid_bm_height %d", fd->valid_bm_height); GST_INFO_OBJECT (element, " valid_bm_width %d", fd->valid_bm_width); GST_INFO_OBJECT (element, " valid_bm_x_offset %d", fd->valid_bm_x_offset); GST_INFO_OBJECT (element, " valid_bm_y_offset %d", fd->valid_bm_y_offset); GST_INFO_OBJECT (element, " video_x_t_offset %d", fd->video_x_t_offset); GST_INFO_OBJECT (element, " video_y_start %d", fd->video_y_start); } gst_buffer_unref (buf); *_vprp = vprp; return TRUE; /* ERRORS */ too_small: { GST_ERROR_OBJECT (element, "Too small vprp (%d available, at least %d needed)", GST_BUFFER_SIZE (buf), (int) G_STRUCT_OFFSET (gst_riff_vprp, field_info)); gst_buffer_unref (buf); return FALSE; } } /* * gst_avi_demux_parse_stream: * @avi: calling element (used for debugging/errors). * @buf: input buffer used to parse the stream. * * Parses all subchunks in a strl chunk (which defines a single * stream). Discards the buffer after use. This function will * increment the stream counter internally. * * Returns: whether the stream was identified successfully. * Errors are not fatal. It does indicate the stream * was skipped. */ static gboolean gst_avi_demux_parse_stream (GstAviDemux * avi, GstBuffer * buf) { avi_stream_context *stream = &avi->stream[avi->num_streams]; GstElementClass *klass; GstPadTemplate *templ; GstBuffer *sub = NULL; guint offset = 4; guint32 tag = 0; gchar *codec_name = NULL, *padname = NULL; const gchar *tag_name; GstCaps *caps = NULL; GstPad *pad; GstElement *element; gboolean got_strh = FALSE, got_strf = FALSE, got_vprp = FALSE; gst_riff_vprp *vprp = NULL; element = GST_ELEMENT_CAST (avi); GST_DEBUG_OBJECT (avi, "Parsing stream"); while (gst_riff_parse_chunk (element, buf, &offset, &tag, &sub)) { /* sub can be NULL if the chunk is empty */ switch (tag) { case GST_RIFF_TAG_strh: if (got_strh) { GST_WARNING_OBJECT (avi, "Ignoring additional strh chunk"); break; } if (!gst_riff_parse_strh (element, sub, &stream->strh)) { GST_WARNING_OBJECT (avi, "Failed to parse strh chunk"); goto fail; } got_strh = TRUE; break; case GST_RIFF_TAG_strf: { gboolean res = FALSE; if (got_strf) { GST_WARNING_OBJECT (avi, "Ignoring additional strf chunk"); break; } if (!got_strh) { GST_ERROR_OBJECT (avi, "Found strf chunk before strh chunk"); goto fail; } switch (stream->strh->type) { case GST_RIFF_FCC_vids: stream->is_vbr = TRUE; res = gst_riff_parse_strf_vids (element, sub, &stream->strf.vids, &stream->extradata); GST_DEBUG_OBJECT (element, "marking video as VBR, res %d", res); break; case GST_RIFF_FCC_auds: stream->is_vbr = (stream->strh->samplesize == 0) && stream->strh->scale > 1; res = gst_riff_parse_strf_auds (element, sub, &stream->strf.auds, &stream->extradata); GST_DEBUG_OBJECT (element, "marking audio as VBR:%d, res %d", stream->is_vbr, res); break; case GST_RIFF_FCC_iavs: stream->is_vbr = TRUE; res = gst_riff_parse_strf_iavs (element, sub, &stream->strf.iavs, &stream->extradata); GST_DEBUG_OBJECT (element, "marking iavs as VBR, res %d", res); break; case GST_RIFF_FCC_txts: /* nothing to parse here */ stream->is_vbr = (stream->strh->samplesize == 0) && (stream->strh->scale > 1); res = TRUE; break; default: GST_ERROR_OBJECT (avi, "Don´t know how to handle stream type %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (stream->strh->type)); break; } if (!res) goto fail; got_strf = TRUE; break; } case GST_RIFF_TAG_vprp: { if (got_vprp) { GST_WARNING_OBJECT (avi, "Ignoring additional vprp chunk"); break; } if (!got_strh) { GST_ERROR_OBJECT (avi, "Found vprp chunk before strh chunk"); goto fail; } if (!got_strf) { GST_ERROR_OBJECT (avi, "Found vprp chunk before strf chunk"); goto fail; } if (!gst_avi_demux_riff_parse_vprp (element, sub, &vprp)) { GST_WARNING_OBJECT (avi, "Failed to parse vprp chunk"); /* not considered fatal */ g_free (vprp); vprp = NULL; } else got_vprp = TRUE; break; } case GST_RIFF_TAG_strd: if (stream->initdata) gst_buffer_unref (stream->initdata); stream->initdata = sub; break; case GST_RIFF_TAG_strn: g_free (stream->name); if (sub != NULL) { stream->name = g_strndup ((gchar *) GST_BUFFER_DATA (sub), (gsize) GST_BUFFER_SIZE (sub)); gst_buffer_unref (sub); sub = NULL; } else { stream->name = g_strdup (""); } GST_DEBUG_OBJECT (avi, "stream name: %s", stream->name); break; default: if (tag == GST_MAKE_FOURCC ('i', 'n', 'd', 'x') || tag == GST_MAKE_FOURCC ('i', 'x', '0' + avi->num_streams / 10, '0' + avi->num_streams % 10)) { g_free (stream->indexes); gst_avi_demux_parse_superindex (avi, sub, &stream->indexes); stream->superindex = TRUE; break; } GST_WARNING_OBJECT (avi, "Unknown stream header tag %" GST_FOURCC_FORMAT ", ignoring", GST_FOURCC_ARGS (tag)); /* fall-through */ case GST_RIFF_TAG_JUNK: if (sub != NULL) { gst_buffer_unref (sub); sub = NULL; } break; } } if (!got_strh) { GST_WARNING_OBJECT (avi, "Failed to find strh chunk"); goto fail; } if (!got_strf) { GST_WARNING_OBJECT (avi, "Failed to find strf chunk"); goto fail; } /* get class to figure out the template */ klass = GST_ELEMENT_GET_CLASS (avi); /* we now have all info, let´s set up a pad and a caps and be done */ /* create stream name + pad */ switch (stream->strh->type) { case GST_RIFF_FCC_vids:{ guint32 fourcc; fourcc = (stream->strf.vids->compression) ? stream->strf.vids->compression : stream->strh->fcc_handler; padname = g_strdup_printf ("video_%02d", avi->num_v_streams); templ = gst_element_class_get_pad_template (klass, "video_%02d"); caps = gst_riff_create_video_caps (fourcc, stream->strh, stream->strf.vids, stream->extradata, stream->initdata, &codec_name); if (!caps) { caps = gst_caps_new_simple ("video/x-avi-unknown", "fourcc", GST_TYPE_FOURCC, fourcc, NULL); } else if (got_vprp && vprp) { guint32 aspect_n, aspect_d; gint n, d; aspect_n = vprp->aspect >> 16; aspect_d = vprp->aspect & 0xffff; /* calculate the pixel aspect ratio using w/h and aspect ratio */ n = aspect_n * stream->strf.vids->height; d = aspect_d * stream->strf.vids->width; if (n && d) gst_caps_set_simple (caps, "pixel-aspect-ratio", GST_TYPE_FRACTION, n, d, NULL); /* very local, not needed elsewhere */ g_free (vprp); vprp = NULL; } tag_name = GST_TAG_VIDEO_CODEC; avi->num_v_streams++; break; } case GST_RIFF_FCC_auds:{ padname = g_strdup_printf ("audio_%02d", avi->num_a_streams); templ = gst_element_class_get_pad_template (klass, "audio_%02d"); caps = gst_riff_create_audio_caps (stream->strf.auds->format, stream->strh, stream->strf.auds, stream->extradata, stream->initdata, &codec_name); if (!caps) { caps = gst_caps_new_simple ("audio/x-avi-unknown", "codec_id", G_TYPE_INT, stream->strf.auds->format, NULL); } tag_name = GST_TAG_AUDIO_CODEC; avi->num_a_streams++; break; } case GST_RIFF_FCC_iavs:{ guint32 fourcc = stream->strh->fcc_handler; padname = g_strdup_printf ("video_%02d", avi->num_v_streams); templ = gst_element_class_get_pad_template (klass, "video_%02d"); caps = gst_riff_create_iavs_caps (fourcc, stream->strh, stream->strf.iavs, stream->extradata, stream->initdata, &codec_name); if (!caps) { caps = gst_caps_new_simple ("video/x-avi-unknown", "fourcc", GST_TYPE_FOURCC, fourcc, NULL); } tag_name = GST_TAG_VIDEO_CODEC; avi->num_v_streams++; break; } case GST_RIFF_FCC_txts:{ padname = g_strdup_printf ("subtitle_%02d", avi->num_t_streams); templ = gst_element_class_get_pad_template (klass, "subtitle_%02d"); caps = gst_caps_new_simple ("application/x-subtitle-avi", NULL); tag_name = NULL; avi->num_t_streams++; break; } default: g_assert_not_reached (); } /* no caps means no stream */ if (!caps) { GST_ERROR_OBJECT (element, "Did not find caps for stream %s", padname); goto fail; } GST_DEBUG_OBJECT (element, "codec-name=%s", (codec_name ? codec_name : "NULL")); GST_DEBUG_OBJECT (element, "caps=%" GST_PTR_FORMAT, caps); /* set proper settings and add it */ if (stream->pad) gst_object_unref (stream->pad); pad = stream->pad = gst_pad_new_from_template (templ, padname); stream->last_flow = GST_FLOW_OK; stream->discont = TRUE; stream->idx_duration = GST_CLOCK_TIME_NONE; stream->hdr_duration = GST_CLOCK_TIME_NONE; stream->duration = GST_CLOCK_TIME_NONE; g_free (padname); gst_pad_use_fixed_caps (pad); #if 0 gst_pad_set_formats_function (pad, GST_DEBUG_FUNCPTR (gst_avi_demux_get_src_formats)); gst_pad_set_event_mask_function (pad, GST_DEBUG_FUNCPTR (gst_avi_demux_get_event_mask)); #endif gst_pad_set_event_function (pad, GST_DEBUG_FUNCPTR (gst_avi_demux_handle_src_event)); gst_pad_set_query_type_function (pad, GST_DEBUG_FUNCPTR (gst_avi_demux_get_src_query_types)); gst_pad_set_query_function (pad, GST_DEBUG_FUNCPTR (gst_avi_demux_handle_src_query)); #if 0 gst_pad_set_convert_function (pad, GST_DEBUG_FUNCPTR (gst_avi_demux_src_convert)); #endif stream->num = avi->num_streams; stream->total_bytes = 0; stream->total_frames = 0; stream->current_frame = 0; stream->current_byte = 0; gst_pad_set_element_private (pad, stream); avi->num_streams++; gst_pad_set_caps (pad, caps); gst_pad_set_active (pad, TRUE); gst_element_add_pad (GST_ELEMENT (avi), pad); GST_LOG_OBJECT (element, "Added pad %s with caps %" GST_PTR_FORMAT, GST_PAD_NAME (pad), caps); gst_caps_unref (caps); /* make tags */ if (codec_name) { if (!stream->taglist) stream->taglist = gst_tag_list_new (); avi->got_tags = TRUE; gst_tag_list_add (stream->taglist, GST_TAG_MERGE_APPEND, tag_name, codec_name, NULL); g_free (codec_name); } return TRUE; /* ERRORS */ fail: { /* unref any mem that may be in use */ if (buf) gst_buffer_unref (buf); if (sub) gst_buffer_unref (sub); g_free (vprp); g_free (codec_name); g_free (stream->strh); g_free (stream->strf.data); g_free (stream->name); g_free (stream->indexes); if (stream->initdata) gst_buffer_unref (stream->initdata); if (stream->extradata) gst_buffer_unref (stream->extradata); memset (stream, 0, sizeof (avi_stream_context)); avi->num_streams++; return FALSE; } } /* * gst_avi_demux_parse_odml: * @avi: calling element (used for debug/error). * @buf: input buffer to be used for parsing. * * Read an openDML-2.0 extension header. Fills in the frame number * in the avi demuxer object when reading succeeds. */ static void gst_avi_demux_parse_odml (GstAviDemux * avi, GstBuffer * buf) { guint32 tag = 0; guint offset = 4; GstBuffer *sub = NULL; while (gst_riff_parse_chunk (GST_ELEMENT_CAST (avi), buf, &offset, &tag, &sub)) { switch (tag) { case GST_RIFF_TAG_dmlh:{ gst_riff_dmlh dmlh, *_dmlh; guint size; /* sub == NULL is possible and means an empty buffer */ size = sub ? GST_BUFFER_SIZE (sub) : 0; /* check size */ if (size < sizeof (gst_riff_dmlh)) { GST_ERROR_OBJECT (avi, "DMLH entry is too small (%d bytes, %d needed)", size, (int) sizeof (gst_riff_dmlh)); goto next; } _dmlh = (gst_riff_dmlh *) GST_BUFFER_DATA (sub); dmlh.totalframes = GUINT32_FROM_LE (_dmlh->totalframes); GST_INFO_OBJECT (avi, "dmlh tag found:"); GST_INFO_OBJECT (avi, " totalframes: %u", dmlh.totalframes); avi->avih->tot_frames = dmlh.totalframes; goto next; } default: GST_WARNING_OBJECT (avi, "Unknown tag %" GST_FOURCC_FORMAT " in ODML header", GST_FOURCC_ARGS (tag)); /* fall-through */ case GST_RIFF_TAG_JUNK: next: /* skip and move to next chunk */ if (sub) { gst_buffer_unref (sub); sub = NULL; } break; } } if (buf) gst_buffer_unref (buf); } /* * Sort helper for index entries that sorts by index time. * If times are equal we sort by stream number. */ static gint sort (gst_avi_index_entry * a, gst_avi_index_entry * b) { if (a->ts > b->ts) return 1; else if (a->ts < b->ts) return -1; else return a->stream_nr - b->stream_nr; } /* * gst_avi_demux_parse_index: * @avi: calling element (used for debugging/errors). * @buf: buffer containing the full index. * @entries_list: list (returned by this function) containing the index * entries parsed from the buffer. The first in the list * is also a pointer to the allocated data and should be * free'ed at some point. * * Read index entries from the provided buffer. Takes ownership of @buf. */ static void gst_avi_demux_parse_index (GstAviDemux * avi, GstBuffer * buf, GList ** _entries_list) { guint64 pos_before = avi->offset; gst_avi_index_entry *entries = NULL; guint8 *data; GList *entries_list = NULL; guint i, num, n; #ifndef GST_DISABLE_DEBUG gulong _nr_keyframes = 0; #endif if (!buf || !GST_BUFFER_SIZE (buf)) { *_entries_list = NULL; GST_DEBUG ("empty index"); if (buf) gst_buffer_unref (buf); return; } data = GST_BUFFER_DATA (buf); num = GST_BUFFER_SIZE (buf) / sizeof (gst_riff_index_entry); if (!(entries = g_try_new (gst_avi_index_entry, num))) goto out_of_mem; GST_INFO ("Parsing index, nr_entries = %6d", num); for (i = 0, n = 0; i < num; i++) { gint64 next_ts; gst_riff_index_entry entry, *_entry; avi_stream_context *stream; guint stream_nr; gst_avi_index_entry *target; GstFormat format; _entry = &((gst_riff_index_entry *) data)[i]; entry.id = GUINT32_FROM_LE (_entry->id); entry.offset = GUINT32_FROM_LE (_entry->offset); entry.flags = GUINT32_FROM_LE (_entry->flags); entry.size = GUINT32_FROM_LE (_entry->size); target = &entries[n]; if (entry.id == GST_RIFF_rec || entry.id == 0 || (entry.offset == 0 && n > 0)) continue; stream_nr = CHUNKID_TO_STREAMNR (entry.id); if (stream_nr >= avi->num_streams) { GST_WARNING_OBJECT (avi, "Index entry %d has invalid stream nr %d", i, stream_nr); continue; } target->stream_nr = stream_nr; stream = &avi->stream[stream_nr]; if (!stream->strh) { GST_WARNING_OBJECT (avi, "Unhandled stream %d, skipping", stream_nr); continue; } target->index_nr = i; target->flags = (entry.flags & GST_RIFF_IF_KEYFRAME) ? GST_AVI_INDEX_ENTRY_FLAG_KEYFRAME : 0; target->size = entry.size; target->offset = entry.offset + 8; /* figure out if the index is 0 based or relative to the MOVI start */ if (n == 0) { if (target->offset < pos_before) avi->index_offset = pos_before + 8; else avi->index_offset = 0; GST_DEBUG ("index_offset = %" G_GUINT64_FORMAT, avi->index_offset); } format = GST_FORMAT_TIME; if (stream->strh->type == GST_RIFF_FCC_auds) { /* all audio frames are keyframes */ target->flags |= GST_AVI_INDEX_ENTRY_FLAG_KEYFRAME; } #ifndef GST_DISABLE_DEBUG if (target->flags & GST_AVI_INDEX_ENTRY_FLAG_KEYFRAME) _nr_keyframes++; #endif /* stream duration unknown, now we can calculate it */ if (stream->idx_duration == -1) stream->idx_duration = 0; /* timestamps */ target->ts = stream->idx_duration; if (stream->is_vbr) { /* VBR stream next timestamp */ gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT, stream->total_frames + 1, &format, &next_ts); } else { /* constant rate stream */ gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES, stream->total_bytes + target->size, &format, &next_ts); } /* duration is next - current */ target->dur = next_ts - target->ts; /* stream position */ target->bytes_before = stream->total_bytes; target->frames_before = stream->total_frames; stream->total_bytes += target->size; stream->total_frames++; stream->idx_duration = next_ts; GST_LOG_OBJECT (avi, "Adding index entry %d (%6u), flags %02x, stream %d, size %u " ", offset %" G_GUINT64_FORMAT ", time %" GST_TIME_FORMAT ", dur %" GST_TIME_FORMAT, target->index_nr, stream->total_frames - 1, target->flags, target->stream_nr, target->size, target->offset, GST_TIME_ARGS (target->ts), GST_TIME_ARGS (target->dur)); entries_list = g_list_prepend (entries_list, target); n++; } GST_INFO ("Parsed index, %6d entries, %5ld keyframes, entry size = %2d, " "total size = %10d", num, _nr_keyframes, (gint) sizeof (gst_avi_index_entry), (gint) (num * sizeof (gst_avi_index_entry))); gst_buffer_unref (buf); if (n > 0) { *_entries_list = g_list_reverse (entries_list); } else { g_free (entries); } return; /* ERRORS */ out_of_mem: { GST_ELEMENT_ERROR (avi, RESOURCE, NO_SPACE_LEFT, (NULL), ("Cannot allocate memory for %u*%u=%u bytes", (guint) sizeof (gst_avi_index_entry), num, (guint) sizeof (gst_avi_index_entry) * num)); gst_buffer_unref (buf); } } /* * gst_avi_demux_stream_index: * @avi: avi demuxer object. * @index: list of index entries, returned by this function. * @alloc_list: list of allocated data, returned by this function. * * Seeks to index and reads it. */ static void gst_avi_demux_stream_index (GstAviDemux * avi, GList ** index, GList ** alloc_list) { GstFlowReturn res; guint64 offset = avi->offset; GstBuffer *buf; guint32 tag; guint32 size; gint i; GST_DEBUG ("demux stream index at offset %" G_GUINT64_FORMAT, offset); *alloc_list = NULL; *index = NULL; /* get chunk information */ res = gst_pad_pull_range (avi->sinkpad, offset, 8, &buf); if (res != GST_FLOW_OK) goto pull_failed; else if (GST_BUFFER_SIZE (buf) < 8) goto too_small; /* check tag first before blindy trying to read 'size' bytes */ tag = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf)); size = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf) + 4); if (tag == GST_RIFF_TAG_LIST) { /* this is the movi tag */ GST_DEBUG_OBJECT (avi, "skip LIST chunk, size %" G_GUINT32_FORMAT, (8 + ((size + 1) & ~1))); offset += 8 + ((size + 1) & ~1); gst_buffer_unref (buf); res = gst_pad_pull_range (avi->sinkpad, offset, 8, &buf); if (res != GST_FLOW_OK) goto pull_failed; else if (GST_BUFFER_SIZE (buf) < 8) goto too_small; tag = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf)); size = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf) + 4); } if (tag != GST_RIFF_TAG_idx1) goto no_index; if (!size) goto zero_index; gst_buffer_unref (buf); GST_DEBUG ("index found at offset %" G_GUINT64_FORMAT, offset); /* read chunk, advance offset */ if (gst_riff_read_chunk (GST_ELEMENT_CAST (avi), avi->sinkpad, &offset, &tag, &buf) != GST_FLOW_OK) return; GST_INFO ("will parse index chunk size %u for tag %" GST_FOURCC_FORMAT, GST_BUFFER_SIZE (buf), GST_FOURCC_ARGS (tag)); gst_avi_demux_parse_index (avi, buf, index); if (*index) *alloc_list = g_list_append (*alloc_list, (*index)->data); /* debug our indexes */ for (i = 0; i < avi->num_streams; i++) { avi_stream_context *stream; stream = &avi->stream[i]; GST_DEBUG_OBJECT (avi, "stream %u: %u frames, %" G_GINT64_FORMAT " bytes", i, stream->total_frames, stream->total_bytes); } return; /* ERRORS */ pull_failed: { GST_DEBUG_OBJECT (avi, "pull range failed: pos=%" G_GUINT64_FORMAT " size=8", offset); return; } too_small: { GST_DEBUG_OBJECT (avi, "Buffer is too small"); gst_buffer_unref (buf); return; } no_index: { GST_WARNING_OBJECT (avi, "No index data (idx1) after movi chunk, but %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag)); gst_buffer_unref (buf); return; } zero_index: { GST_WARNING_OBJECT (avi, "Empty index data (idx1) after movi chunk"); gst_buffer_unref (buf); return; } } #if 0 /* * Sync to next data chunk. */ static gboolean gst_avi_demux_skip (GstAviDemux * avi, gboolean prevent_eos) { GstRiffRead *riff = GST_RIFF_READ (avi); if (prevent_eos) { guint64 pos, length; guint size; guint8 *data; pos = gst_bytestream_tell (riff->bs); length = gst_bytestream_length (riff->bs); if (pos + 8 > length) return FALSE; if (gst_bytestream_peek_bytes (riff->bs, &data, 8) != 8) return FALSE; size = GST_READ_UINT32_LE (&data[4]); if (size & 1) size++; /* Note, we're going to skip which might involve seeks. Therefore, * we need 1 byte more! */ if (pos + 8 + size >= length) return FALSE; } return gst_riff_read_skip (riff); } static gboolean gst_avi_demux_sync (GstAviDemux * avi, guint32 * ret_tag, gboolean prevent_eos) { GstRiffRead *riff = GST_RIFF_READ (avi); guint32 tag; guint64 length = gst_bytestream_length (riff->bs); if (prevent_eos && gst_bytestream_tell (riff->bs) + 12 >= length) return FALSE; /* peek first (for the end of this 'list/movi' section) */ if (!(tag = gst_riff_peek_tag (riff, &avi->level_up))) return FALSE; /* if we're at top-level, we didn't read the 'movi' * list tag yet. This can also be 'AVIX' in case of * openDML-2.0 AVI files. Lastly, it might be idx1, * in which case we skip it so we come at EOS. */ while (1) { if (prevent_eos && gst_bytestream_tell (riff->bs) + 12 >= length) return FALSE; if (!(tag = gst_riff_peek_tag (riff, NULL))) return FALSE; switch (tag) { case GST_RIFF_TAG_LIST: if (!(tag = gst_riff_peek_list (riff))) return FALSE; switch (tag) { case GST_RIFF_LIST_AVIX: if (!gst_riff_read_list (riff, &tag)) return FALSE; break; case GST_RIFF_LIST_movi: if (!gst_riff_read_list (riff, &tag)) return FALSE; /* fall-through */ case GST_RIFF_rec: goto done; default: GST_WARNING ("Unknown list %" GST_FOURCC_FORMAT " before AVI data", GST_FOURCC_ARGS (tag)); /* fall-through */ case GST_RIFF_TAG_JUNK: if (!gst_avi_demux_skip (avi, prevent_eos)) return FALSE; break; } break; default: if ((tag & 0xff) >= '0' && (tag & 0xff) <= '9' && ((tag >> 8) & 0xff) >= '0' && ((tag >> 8) & 0xff) <= '9') { goto done; } /* pass-through */ case GST_RIFF_TAG_idx1: case GST_RIFF_TAG_JUNK: if (!gst_avi_demux_skip (avi, prevent_eos)) { return FALSE; } break; } } done: /* And then, we get the data */ if (prevent_eos && gst_bytestream_tell (riff->bs) + 12 >= length) return FALSE; if (!(tag = gst_riff_peek_tag (riff, NULL))) return FALSE; /* Support for rec-list files */ switch (tag) { case GST_RIFF_TAG_LIST: if (!(tag = gst_riff_peek_list (riff))) return FALSE; if (tag == GST_RIFF_rec) { /* Simply skip the list */ if (!gst_riff_read_list (riff, &tag)) return FALSE; if (!(tag = gst_riff_peek_tag (riff, NULL))) return FALSE; } break; case GST_RIFF_TAG_JUNK: gst_avi_demux_skip (avi, prevent_eos); return FALSE; } if (ret_tag) *ret_tag = tag; return TRUE; } #endif /* * gst_avi_demux_peek_tag: * * Returns the tag and size of the next chunk */ static GstFlowReturn gst_avi_demux_peek_tag (GstAviDemux * avi, guint64 offset, guint32 * tag, guint * size) { GstFlowReturn res = GST_FLOW_OK; GstBuffer *buf = NULL; guint bufsize; res = gst_pad_pull_range (avi->sinkpad, offset, 8, &buf); if (res != GST_FLOW_OK) goto pull_failed; bufsize = GST_BUFFER_SIZE (buf); if (bufsize != 8) goto wrong_size; *tag = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf)); *size = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf) + 4); GST_LOG_OBJECT (avi, "Tag[%" GST_FOURCC_FORMAT "] (size:%d) %" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT, GST_FOURCC_ARGS (*tag), *size, offset + 8, offset + 8 + (gint64) * size); done: gst_buffer_unref (buf); return res; /* ERRORS */ pull_failed: { GST_DEBUG_OBJECT (avi, "pull_ranged returned %s", gst_flow_get_name (res)); return res; } wrong_size: { GST_DEBUG_OBJECT (avi, "got %d bytes which is <> 8 bytes", bufsize); res = GST_FLOW_ERROR; goto done; } } /* * gst_avi_demux_next_data_buffer: * * Returns the offset and size of the next buffer * Position is the position of the buffer (after tag and size) */ static GstFlowReturn gst_avi_demux_next_data_buffer (GstAviDemux * avi, guint64 * offset, guint32 * tag, guint * size) { guint64 off = *offset; guint _size = 0; GstFlowReturn res; do { res = gst_avi_demux_peek_tag (avi, off, tag, &_size); if (res != GST_FLOW_OK) break; if (*tag == GST_RIFF_TAG_LIST) off += 8 + 4; /* skip tag + size + subtag */ else { *offset = off + 8; *size = _size; break; } } while (TRUE); return res; } /* * gst_avi_demux_stream_scan: * @avi: calling element (used for debugging/errors). * @index: list of index entries, returned by this function. * @alloc_list: list of allocated data, returned by this function. * * Scan the file for all chunks to "create" a new index. * Return value indicates if we can continue reading the stream. It * does not say anything about whether we created an index. * * pull-range based */ static gboolean gst_avi_demux_stream_scan (GstAviDemux * avi, GList ** index, GList ** alloc_list) { GstFlowReturn res; gst_avi_index_entry *entry, *entries = NULL; avi_stream_context *stream; GstFormat format; guint64 pos = avi->offset; guint64 length; gint64 tmplength; guint32 tag = 0; GList *list = NULL; guint index_size = 0; /* FIXME: * - implement non-seekable source support. */ GST_DEBUG_OBJECT (avi, "Creating index %s existing index, starting at offset %" G_GUINT64_FORMAT, ((*index) ? "with" : "without"), pos); format = GST_FORMAT_BYTES; if (!gst_pad_query_peer_duration (avi->sinkpad, &format, &tmplength)) return FALSE; length = tmplength; if (*index) { entry = g_list_last (*index)->data; pos = entry->offset + avi->index_offset + entry->size; if (entry->size & 1) pos++; if (pos >= length) { GST_LOG_OBJECT (avi, "Complete index, we're done"); return TRUE; } GST_LOG_OBJECT (avi, "Incomplete index, seeking to last valid entry @ %" G_GUINT64_FORMAT " of %" G_GUINT64_FORMAT " (%" G_GUINT64_FORMAT "+%u)", pos, length, entry->offset, entry->size); } while (TRUE) { guint stream_nr; guint size = 0; gint64 tmpts, tmpnextts; res = gst_avi_demux_next_data_buffer (avi, &pos, &tag, &size); if (res != GST_FLOW_OK) break; /* check valid stream */ stream_nr = CHUNKID_TO_STREAMNR (tag); if (stream_nr >= avi->num_streams) { GST_WARNING_OBJECT (avi, "Index entry has invalid stream nr %d", stream_nr); goto next; } stream = &avi->stream[stream_nr]; /* pre-allocate */ if (index_size % 1024 == 0) { entries = g_new (gst_avi_index_entry, 1024); *alloc_list = g_list_prepend (*alloc_list, entries); } entry = &entries[index_size % 1024]; entry->index_nr = index_size++; entry->stream_nr = stream_nr; entry->flags = GST_AVI_INDEX_ENTRY_FLAG_KEYFRAME; entry->offset = pos - avi->index_offset; entry->size = size; /* timestamps, get timestamps of two consecutive frames to calculate * timestamp and duration. */ format = GST_FORMAT_TIME; if (stream->is_vbr) { /* VBR stream */ gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT, stream->total_frames, &format, &tmpts); gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT, stream->total_frames + 1, &format, &tmpnextts); } else { /* constant rate stream */ gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES, stream->total_bytes, &format, &tmpts); gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES, stream->total_bytes + entry->size, &format, &tmpnextts); } entry->ts = tmpts; entry->dur = tmpnextts - tmpts; /* stream position */ entry->bytes_before = stream->total_bytes; stream->total_bytes += entry->size; entry->frames_before = stream->total_frames; stream->total_frames++; stream->idx_duration = tmpnextts; list = g_list_prepend (list, entry); GST_DEBUG_OBJECT (avi, "Added index entry %d (in stream: %d), offset %" G_GUINT64_FORMAT ", time %" GST_TIME_FORMAT " for stream %d", index_size - 1, entry->frames_before, entry->offset, GST_TIME_ARGS (entry->ts), entry->stream_nr); next: /* update position */ pos += GST_ROUND_UP_2 (size); if (pos > length) { GST_WARNING_OBJECT (avi, "Stopping index lookup since we are further than EOF"); break; } } /* FIXME: why is this disabled */ #if 0 while (gst_avi_demux_sync (avi, &tag, TRUE)) { guint stream_nr = CHUNKID_TO_STREAMNR (tag); guint8 *data; GstFormat format = GST_FORMAT_TIME; if (stream_nr >= avi->num_streams) goto next; stream = &avi->stream[stream_nr]; /* get chunk size */ if (gst_bytestream_peek_bytes (riff->bs, &data, 8) != 8) goto next; /* fill in */ entry->index_nr = index_size++; entry->stream_nr = stream_nr; entry->flags = GST_AVI_INDEX_ENTRY_FLAG_KEYFRAME; entry->offset = gst_bytestream_tell (riff->bs) + 8 - avi->index_offset; entry->size = GST_READ_UINT32_LE (&data[4]); /* timestamps */ if (stream->is_vbr) { /* VBR stream */ gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT, stream->total_frames, &format, &entry->ts); gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT, stream->total_frames + 1, &format, &entry->dur); } else { /* constant rate stream */ gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES, stream->total_bytes, &format, &entry->ts); gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES, stream->total_bytes + entry->size, &format, &entry->dur); } entry->dur -= entry->ts; /* stream position */ entry->bytes_before = stream->total_bytes; stream->total_bytes += entry->size; entry->frames_before = stream->total_frames; stream->total_frames++; list = g_list_prepend (list, entry); GST_DEBUG_OBJECT (avi, "Added index entry %d (in stream: %d), offset %" G_GUINT64_FORMAT ", time %" GST_TIME_FORMAT " for stream %d", index_size - 1, entry->frames_before, entry->offset, GST_TIME_ARGS (entry->ts), entry->stream_nr); next: if (!gst_avi_demux_skip (avi, TRUE)) break; } /* seek back */ if (!(event = gst_riff_read_seek (riff, pos))) { g_list_free (list); return FALSE; } gst_event_unref (event); #endif GST_DEBUG_OBJECT (avi, "index created, %d items", index_size); *index = g_list_concat (*index, g_list_reverse (list)); return TRUE; } /* * gst_avi_demux_massage_index: * @avi: calling element (used for debugging/errors). * * We're going to go over each entry in the index and finetune * some things we don't like about AVI. For example, a single * chunk might be too long. Also, individual streams might be * out-of-sync. In the first case, we cut the chunk in several * smaller pieces. In the second case, we re-order chunk reading * order. The end result should be a smoother playing AVI. */ static gboolean gst_avi_demux_massage_index (GstAviDemux * avi, GList * list, GList * alloc_list) { gst_avi_index_entry *entry; avi_stream_context *stream; guint i; GList *node; gint64 delay = G_GINT64_CONSTANT (0); GST_LOG_OBJECT (avi, "Starting index massage, nr_entries = %d", list ? g_list_length (list) : 0); if (list) { #ifndef GST_DISABLE_DEBUG guint num_added_total = 0; guint num_per_stream[GST_AVI_DEMUX_MAX_STREAMS] = { 0, }; #endif GST_LOG_OBJECT (avi, "I'm now going to cut large chunks into smaller pieces"); /* cut chunks in small (seekable) pieces * FIXME: this should be a property where a value of * GST_CLOCK_TIME_NONE would disable the chunking */ #define MAX_DURATION (GST_SECOND / 2) for (i = 0; i < avi->num_streams; i++) { /* only chop streams that have exactly *one* chunk */ if (avi->stream[i].total_frames != 1) continue; for (node = list; node != NULL; node = node->next) { entry = node->data; if (entry->stream_nr != i) continue; /* check for max duration of a single buffer. I suppose that * the allocation of index entries could be improved. */ stream = &avi->stream[entry->stream_nr]; if (entry->dur > MAX_DURATION && stream->strh->type == GST_RIFF_FCC_auds) { guint32 ideal_size; gst_avi_index_entry *entries; guint old_size, num_added; GList *node2; /* cut in 1/10th of a second */ ideal_size = stream->strf.auds->av_bps / 10; /* ensure chunk size is multiple of blockalign */ if (stream->strf.auds->blockalign > 1) ideal_size -= ideal_size % stream->strf.auds->blockalign; /* copy index */ old_size = entry->size; num_added = (entry->size - 1) / ideal_size; avi->index_size += num_added; entries = g_malloc (sizeof (gst_avi_index_entry) * num_added); alloc_list = g_list_prepend (alloc_list, entries); for (node2 = node->next; node2 != NULL; node2 = node2->next) { gst_avi_index_entry *entry2 = node2->data; entry2->index_nr += num_added; if (entry2->stream_nr == entry->stream_nr) entry2->frames_before += num_added; } /* new sized index chunks */ for (i = 0; i < num_added + 1; i++) { gst_avi_index_entry *entry2; if (i == 0) { entry2 = entry; } else { entry2 = &entries[i - 1]; list = g_list_insert_before (list, node->next, entry2); entry = node->data; node = node->next; memcpy (entry2, entry, sizeof (gst_avi_index_entry)); } if (old_size >= ideal_size) { entry2->size = ideal_size; old_size -= ideal_size; } else { entry2->size = old_size; } entry2->dur = GST_SECOND * entry2->size / stream->strf.auds->av_bps; if (i != 0) { entry2->index_nr++; entry2->ts += entry->dur; entry2->offset += entry->size; entry2->bytes_before += entry->size; entry2->frames_before++; } } #ifndef GST_DISABLE_DEBUG num_added_total += num_added; #endif } } } #ifndef GST_DISABLE_DEBUG if (num_added_total) GST_LOG ("added %u new index entries", num_added_total); #endif GST_LOG_OBJECT (avi, "I'm now going to reorder the index entries for time"); /* re-order for time */ list = g_list_sort (list, (GCompareFunc) sort); /* make a continous array out of the list */ avi->index_size = g_list_length (list); avi->index_entries = g_try_new (gst_avi_index_entry, avi->index_size); if (!avi->index_entries) goto out_of_mem; entry = (gst_avi_index_entry *) (list->data); delay = entry->ts; GST_LOG_OBJECT (avi, "Building index array, nr_entries = %d (time offset = %" GST_TIME_FORMAT, avi->index_size, GST_TIME_ARGS (delay)); for (i = 0, node = list; node != NULL; node = node->next, i++) { entry = node->data; entry->index_nr = i; entry->ts -= delay; memcpy (&avi->index_entries[i], entry, sizeof (gst_avi_index_entry)); #ifndef GST_DISABLE_DEBUG num_per_stream[entry->stream_nr]++; #endif GST_LOG_OBJECT (avi, "Sorted index entry %3d for stream %d of size %6u" " at offset %7" G_GUINT64_FORMAT ", time %" GST_TIME_FORMAT " dur %" GST_TIME_FORMAT, avi->index_entries[i].index_nr, entry->stream_nr, entry->size, entry->offset, GST_TIME_ARGS (entry->ts), GST_TIME_ARGS (entry->dur)); } if (delay) { for (i = 0; i < avi->num_streams; i++) { stream = &avi->stream[i]; stream->idx_duration -= delay; } } #ifndef GST_DISABLE_DEBUG { gchar str[GST_AVI_DEMUX_MAX_STREAMS * (1 + 6 + 2)]; gchar *pad_name; for (i = 0; i < avi->num_streams; i++) { if (!avi->stream[i].pad) continue; pad_name = GST_OBJECT_NAME (avi->stream[i].pad); sprintf (&str[i * (1 + 6 + 2)], " %6u %c", num_per_stream[i], pad_name[0]); } GST_LOG_OBJECT (avi, "indizies per stream:%20s", str); } #endif GST_LOG_OBJECT (avi, "Freeing original index list"); /* all the node->data in list point to alloc_list chunks */ g_list_free (list); } if (alloc_list) { g_list_foreach (alloc_list, (GFunc) g_free, NULL); g_list_free (alloc_list); } #ifndef GST_DISABLE_GST_DEBUG for (i = 0; i < avi->num_streams; i++) { GST_LOG_OBJECT (avi, "Stream %d, %d frames, %8" G_GUINT64_FORMAT " bytes", i, avi->stream[i].total_frames, avi->stream[i].total_bytes); } #endif GST_LOG_OBJECT (avi, "Index massaging done"); return TRUE; /* ERRORS */ out_of_mem: GST_WARNING_OBJECT (avi, "Out of memory for %" G_GSIZE_FORMAT " bytes", sizeof (gst_avi_index_entry) * avi->index_size); return FALSE; } static void gst_avi_demux_calculate_durations_from_index (GstAviDemux * avi) { gst_avi_index_entry *entry; gint stream; GstClockTime total; total = GST_CLOCK_TIME_NONE; /* all streams start at a timestamp 0 */ for (stream = 0; stream < avi->num_streams; stream++) { GstClockTime duration, hduration; avi_stream_context *streamc = &avi->stream[stream]; gst_riff_strh *strh = streamc->strh; if (!strh) continue; /* get header duration */ hduration = gst_util_uint64_scale ((guint64) strh->length * strh->scale, GST_SECOND, (guint64) strh->rate); GST_INFO ("Stream %d duration according to header: %" GST_TIME_FORMAT, stream, GST_TIME_ARGS (hduration)); if (hduration == 0) hduration = GST_CLOCK_TIME_NONE; /* set duration for the stream */ streamc->hdr_duration = hduration; /* get last index entry to get duration */ if ((entry = gst_avi_demux_index_last (avi, stream))) duration = entry->ts + entry->dur; else duration = GST_CLOCK_TIME_NONE; streamc->idx_duration = duration; /* now pick a good duration */ if (GST_CLOCK_TIME_IS_VALID (duration)) { /* index gave valid duration, use that */ GST_INFO ("Stream %d duration according to index: %" GST_TIME_FORMAT, stream, GST_TIME_ARGS (duration)); } else { /* fall back to header info to calculate a duration */ duration = hduration; } /* set duration for the stream */ streamc->duration = duration; /* find total duration */ if (total == GST_CLOCK_TIME_NONE || duration > total) total = duration; } if (GST_CLOCK_TIME_IS_VALID (total) && (total > 0)) { /* now update the duration for those streams where we had none */ for (stream = 0; stream < avi->num_streams; stream++) { avi_stream_context *streamc = &avi->stream[stream]; if (!GST_CLOCK_TIME_IS_VALID (streamc->duration) || streamc->duration == 0) { streamc->duration = total; GST_INFO ("Stream %d duration according to total: %" GST_TIME_FORMAT, stream, GST_TIME_ARGS (total)); } } } /* and set the total duration in the segment. */ GST_INFO ("Setting total duration to: %" GST_TIME_FORMAT, GST_TIME_ARGS (total)); gst_segment_set_duration (&avi->segment, GST_FORMAT_TIME, total); } static gboolean gst_avi_demux_push_event (GstAviDemux * avi, GstEvent * event) { gboolean result = FALSE; gint i; GST_DEBUG_OBJECT (avi, "sending %s event to %d streams", GST_EVENT_TYPE_NAME (event), avi->num_streams); if (avi->num_streams) { for (i = 0; i < avi->num_streams; i++) { avi_stream_context *stream = &avi->stream[i]; if (stream->pad) { if (gst_pad_push_event (stream->pad, gst_event_ref (event))) result = TRUE; } } } gst_event_unref (event); return result; } /* * Read AVI headers when streaming */ static GstFlowReturn gst_avi_demux_stream_header_push (GstAviDemux * avi) { GstFlowReturn ret = GST_FLOW_OK; guint32 tag = 0; guint32 ltag = 0; guint32 size = 0; const guint8 *data; GstBuffer *buf = NULL, *sub = NULL; guint offset = 4; gint64 stop; GST_DEBUG ("Reading and parsing avi headers: %d", avi->header_state); switch (avi->header_state) { case GST_AVI_DEMUX_HEADER_TAG_LIST: if (gst_avi_demux_peek_chunk (avi, &tag, &size)) { avi->offset += 8 + ((size + 1) & ~1); if (tag != GST_RIFF_TAG_LIST) goto header_no_list; gst_adapter_flush (avi->adapter, 8); /* Find the 'hdrl' LIST tag */ GST_DEBUG ("Reading %d bytes", size); buf = gst_adapter_take_buffer (avi->adapter, size); if (GST_READ_UINT32_LE (GST_BUFFER_DATA (buf)) != GST_RIFF_LIST_hdrl) goto header_no_hdrl; GST_DEBUG ("'hdrl' LIST tag found. Parsing next chunk"); /* the hdrl starts with a 'avih' header */ if (!gst_riff_parse_chunk (GST_ELEMENT (avi), buf, &offset, &tag, &sub)) goto header_no_avih; if (tag != GST_RIFF_TAG_avih) goto header_no_avih; if (!gst_avi_demux_parse_avih (GST_ELEMENT (avi), sub, &avi->avih)) goto header_wrong_avih; GST_DEBUG_OBJECT (avi, "AVI header ok, reading elemnts from header"); /* now, read the elements from the header until the end */ while (gst_riff_parse_chunk (GST_ELEMENT (avi), buf, &offset, &tag, &sub)) { /* sub can be NULL on empty tags */ if (!sub) continue; switch (tag) { case GST_RIFF_TAG_LIST: if (GST_BUFFER_SIZE (sub) < 4) goto next; switch (GST_READ_UINT32_LE (GST_BUFFER_DATA (sub))) { case GST_RIFF_LIST_strl: if (!(gst_avi_demux_parse_stream (avi, sub))) { GST_ELEMENT_WARNING (avi, STREAM, DEMUX, (NULL), ("failed to parse stream, ignoring")); goto next; } goto next; case GST_RIFF_LIST_odml: gst_avi_demux_parse_odml (avi, sub); break; default: GST_WARNING_OBJECT (avi, "Unknown list %" GST_FOURCC_FORMAT " in AVI header", GST_FOURCC_ARGS (GST_READ_UINT32_LE (GST_BUFFER_DATA (sub)))); /* fall-through */ case GST_RIFF_TAG_JUNK: goto next; } break; default: GST_WARNING_OBJECT (avi, "Unknown off %d tag %" GST_FOURCC_FORMAT " in AVI header", offset, GST_FOURCC_ARGS (tag)); /* fall-through */ case GST_RIFF_TAG_JUNK: next: /* move to next chunk */ gst_buffer_unref (sub); sub = NULL; break; } } gst_buffer_unref (buf); GST_DEBUG ("elements parsed"); /* check parsed streams */ if (avi->num_streams == 0) { goto no_streams; } else if (avi->num_streams != avi->avih->streams) { GST_WARNING_OBJECT (avi, "Stream header mentioned %d streams, but %d available", avi->avih->streams, avi->num_streams); } GST_DEBUG ("Get junk and info next"); avi->header_state = GST_AVI_DEMUX_HEADER_INFO; } else { /* Need more data */ return ret; } /* fall-though */ case GST_AVI_DEMUX_HEADER_INFO: GST_DEBUG_OBJECT (avi, "skipping junk between header and data ..."); while (TRUE) { if (gst_adapter_available (avi->adapter) < 12) return GST_FLOW_OK; data = gst_adapter_peek (avi->adapter, 12); tag = GST_READ_UINT32_LE (data); size = GST_READ_UINT32_LE (data + 4); ltag = GST_READ_UINT32_LE (data + 8); if (tag == GST_RIFF_TAG_LIST) { switch (ltag) { case GST_RIFF_LIST_movi: gst_adapter_flush (avi->adapter, 12); avi->offset += 12; goto skipping_done; case GST_RIFF_LIST_INFO: GST_DEBUG ("Found INFO chunk"); if (gst_avi_demux_peek_chunk (avi, &tag, &size)) { avi->offset += 12; gst_adapter_flush (avi->adapter, 12); buf = gst_adapter_take_buffer (avi->adapter, size - 4); gst_riff_parse_info (GST_ELEMENT (avi), buf, &avi->globaltags); gst_buffer_unref (buf); avi->offset += ((size + 1) & ~1) - 4; } else { /* Need more data */ return GST_FLOW_OK; } break; default: if (gst_avi_demux_peek_chunk (avi, &tag, &size)) { avi->offset += 8 + ((size + 1) & ~1); gst_adapter_flush (avi->adapter, 8 + ((size + 1) & ~1)); // ??? goto iterate; ??? } else { /* Need more data */ return GST_FLOW_OK; } break; } } else { if (gst_avi_demux_peek_chunk (avi, &tag, &size)) { avi->offset += 8 + ((size + 1) & ~1); gst_adapter_flush (avi->adapter, 8 + ((size + 1) & ~1)); //goto iterate; } else { /* Need more data */ return GST_FLOW_OK; } } } break; default: GST_WARNING ("unhandled header state: %d", avi->header_state); break; } skipping_done: GST_DEBUG_OBJECT (avi, "skipping done ... (streams=%u, stream[0].indexes=%p)", avi->num_streams, avi->stream[0].indexes); GST_DEBUG ("Found movi chunk. Starting to stream data"); avi->state = GST_AVI_DEMUX_MOVI; #if 0 /*GList *index = NULL, *alloc = NULL; */ /* ######################## this need to be integrated with the state */ /* create or read stream index (for seeking) */ if (avi->stream[0].indexes != NULL) { gst_avi_demux_read_subindexes_push (avi, &index, &alloc); } if (!index) { if (avi->avih->flags & GST_RIFF_AVIH_HASINDEX) { gst_avi_demux_stream_index (avi, &index, &alloc); } /* some indexes are incomplete, continue streaming from there */ if (!index) gst_avi_demux_stream_scan (avi, &index, &alloc); } /* this is a fatal error */ if (!index) goto no_index; if (!gst_avi_demux_massage_index (avi, index, alloc)) goto no_index; gst_avi_demux_calculate_durations_from_index (avi); /* ######################## */ #endif /* create initial NEWSEGMENT event */ if ((stop = avi->segment.stop) == GST_CLOCK_TIME_NONE) stop = avi->segment.duration; GST_DEBUG_OBJECT (avi, "segment stop %" G_GINT64_FORMAT, stop); if (avi->seek_event) gst_event_unref (avi->seek_event); avi->seek_event = gst_event_new_new_segment (FALSE, avi->segment.rate, GST_FORMAT_TIME, avi->segment.start, stop, avi->segment.start); /* at this point we know all the streams and we can signal the no more * pads signal */ GST_DEBUG_OBJECT (avi, "signaling no more pads"); gst_element_no_more_pads (GST_ELEMENT (avi)); return GST_FLOW_OK; /* ERRORS */ no_streams: { GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("No streams found")); return GST_FLOW_ERROR; } header_no_list: { GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("Invalid AVI header (no LIST at start): %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag))); return GST_FLOW_ERROR; } header_no_hdrl: { GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("Invalid AVI header (no hdrl at start): %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag))); gst_buffer_unref (buf); return GST_FLOW_ERROR; } header_no_avih: { GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("Invalid AVI header (no avih at start): %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag))); if (sub) gst_buffer_unref (sub); gst_buffer_unref (buf); return GST_FLOW_ERROR; } header_wrong_avih: { gst_buffer_unref (buf); return GST_FLOW_ERROR; } } /* * Read full AVI headers. */ static GstFlowReturn gst_avi_demux_stream_header_pull (GstAviDemux * avi) { GstFlowReturn res; GstBuffer *buf, *sub = NULL; guint32 tag; GList *index = NULL, *alloc = NULL; guint offset = 4; gint64 stop; GstElement *element = GST_ELEMENT_CAST (avi); /* the header consists of a 'hdrl' LIST tag */ res = gst_riff_read_chunk (element, avi->sinkpad, &avi->offset, &tag, &buf); if (res != GST_FLOW_OK) goto pull_range_failed; else if (tag != GST_RIFF_TAG_LIST) goto no_list; else if (GST_BUFFER_SIZE (buf) < 4) goto no_header; GST_DEBUG_OBJECT (avi, "parsing headers"); /* Find the 'hdrl' LIST tag */ while (GST_READ_UINT32_LE (GST_BUFFER_DATA (buf)) != GST_RIFF_LIST_hdrl) { GST_LOG_OBJECT (avi, "buffer contains %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (GST_READ_UINT32_LE (GST_BUFFER_DATA (buf)))); /* Eat up */ gst_buffer_unref (buf); /* read new chunk */ res = gst_riff_read_chunk (element, avi->sinkpad, &avi->offset, &tag, &buf); if (res != GST_FLOW_OK) goto pull_range_failed; else if (tag != GST_RIFF_TAG_LIST) goto no_list; else if (GST_BUFFER_SIZE (buf) < 4) goto no_header; } GST_DEBUG_OBJECT (avi, "hdrl LIST tag found"); /* the hdrl starts with a 'avih' header */ if (!gst_riff_parse_chunk (element, buf, &offset, &tag, &sub)) goto no_avih; else if (tag != GST_RIFF_TAG_avih) goto no_avih; else if (!gst_avi_demux_parse_avih (element, sub, &avi->avih)) goto invalid_avih; GST_DEBUG_OBJECT (avi, "AVI header ok, reading elements from header"); /* now, read the elements from the header until the end */ while (gst_riff_parse_chunk (element, buf, &offset, &tag, &sub)) { /* sub can be NULL on empty tags */ if (!sub) continue; switch (tag) { case GST_RIFF_TAG_LIST: { guint8 *data; guint32 fourcc; if (GST_BUFFER_SIZE (sub) < 4) goto next; data = GST_BUFFER_DATA (sub); fourcc = GST_READ_UINT32_LE (data); switch (fourcc) { case GST_RIFF_LIST_strl: if (!(gst_avi_demux_parse_stream (avi, sub))) { GST_ELEMENT_WARNING (avi, STREAM, DEMUX, (NULL), ("faile to parse stream, ignoring")); sub = NULL; } goto next; case GST_RIFF_LIST_odml: gst_avi_demux_parse_odml (avi, sub); break; default: GST_WARNING_OBJECT (avi, "Unknown list %" GST_FOURCC_FORMAT " in AVI header", GST_FOURCC_ARGS (fourcc)); /* fall-through */ case GST_RIFF_TAG_JUNK: goto next; } break; } default: GST_WARNING_OBJECT (avi, "Unknown tag %" GST_FOURCC_FORMAT " in AVI header at off %d", GST_FOURCC_ARGS (tag), offset); /* fall-through */ case GST_RIFF_TAG_JUNK: next: if (sub) gst_buffer_unref (sub); sub = NULL; break; } } gst_buffer_unref (buf); GST_DEBUG ("elements parsed"); /* check parsed streams */ if (avi->num_streams == 0) goto no_streams; else if (avi->num_streams != avi->avih->streams) { GST_WARNING_OBJECT (avi, "Stream header mentioned %d streams, but %d available", avi->avih->streams, avi->num_streams); } GST_DEBUG_OBJECT (avi, "skipping junk between header and data ..."); /* Now, find the data (i.e. skip all junk between header and data) */ do { guint size; guint32 tag, ltag; res = gst_pad_pull_range (avi->sinkpad, avi->offset, 12, &buf); if (res != GST_FLOW_OK) { GST_DEBUG_OBJECT (avi, "pull_range failure while looking for tags"); goto pull_range_failed; } else if (GST_BUFFER_SIZE (buf) < 12) { GST_DEBUG_OBJECT (avi, "got %d bytes which is less than 12 bytes", GST_BUFFER_SIZE (buf)); gst_buffer_unref (buf); return GST_FLOW_ERROR; } tag = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf)); size = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf) + 4); ltag = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf) + 8); gst_buffer_unref (buf); if (tag == GST_RIFF_TAG_LIST) { switch (ltag) { case GST_RIFF_LIST_movi: goto skipping_done; case GST_RIFF_LIST_INFO: res = gst_riff_read_chunk (element, avi->sinkpad, &avi->offset, &tag, &buf); if (res != GST_FLOW_OK) { GST_DEBUG_OBJECT (avi, "couldn't read INFO chunk"); goto pull_range_failed; } sub = gst_buffer_create_sub (buf, 4, GST_BUFFER_SIZE (buf) - 4); gst_riff_parse_info (element, sub, &avi->globaltags); if (sub) { gst_buffer_unref (sub); sub = NULL; } gst_buffer_unref (buf); /* gst_riff_read_chunk() has already advanced avi->offset */ break; default: avi->offset += 8 + ((size + 1) & ~1); break; } } else { avi->offset += 8 + ((size + 1) & ~1); } } while (1); skipping_done: GST_DEBUG_OBJECT (avi, "skipping done ... (streams=%u, stream[0].indexes=%p)", avi->num_streams, avi->stream[0].indexes); /* create or read stream index (for seeking) */ if (avi->stream[0].indexes != NULL) { /* we read a super index already (gst_avi_demux_parse_superindex() ) */ gst_avi_demux_read_subindexes_pull (avi, &index, &alloc); } if (!index) { if (avi->avih->flags & GST_RIFF_AVIH_HASINDEX) { gst_avi_demux_stream_index (avi, &index, &alloc); } /* some indexes are incomplete, continue streaming from there */ if (!index) gst_avi_demux_stream_scan (avi, &index, &alloc); } /* this is a fatal error */ if (!index) goto no_index; if (!gst_avi_demux_massage_index (avi, index, alloc)) goto no_index; gst_avi_demux_calculate_durations_from_index (avi); /* create initial NEWSEGMENT event */ if ((stop = avi->segment.stop) == GST_CLOCK_TIME_NONE) stop = avi->segment.duration; GST_DEBUG_OBJECT (avi, "segment stop %" G_GINT64_FORMAT, stop); if (avi->seek_event) gst_event_unref (avi->seek_event); avi->seek_event = gst_event_new_new_segment (FALSE, avi->segment.rate, GST_FORMAT_TIME, avi->segment.start, stop, avi->segment.start); /* at this point we know all the streams and we can signal the no more * pads signal */ GST_DEBUG_OBJECT (avi, "signaling no more pads"); gst_element_no_more_pads (GST_ELEMENT_CAST (avi)); return GST_FLOW_OK; /* ERRORS */ no_list: { GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("Invalid AVI header (no LIST at start): %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag))); gst_buffer_unref (buf); return GST_FLOW_ERROR; } no_header: { GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("Invalid AVI header (no hdrl at start): %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag))); gst_buffer_unref (buf); return GST_FLOW_ERROR; } no_avih: { GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("Invalid AVI header (no avih at start): %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag))); if (sub) gst_buffer_unref (sub); gst_buffer_unref (buf); return GST_FLOW_ERROR; } invalid_avih: { GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("Invalid AVI header (cannot parse avih at start)")); if (sub) gst_buffer_unref (sub); gst_buffer_unref (buf); return GST_FLOW_ERROR; } no_streams: { GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("No streams found")); return GST_FLOW_ERROR; } no_index: { GST_WARNING ("file without or too big index"); g_list_free (index); g_list_foreach (alloc, (GFunc) g_free, NULL); g_list_free (alloc); GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("Could not get/create index")); return GST_FLOW_ERROR; } pull_range_failed: { GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("pull_range flow reading header: %s", gst_flow_get_name (res))); return GST_FLOW_ERROR; } } /* * Do the actual seeking. */ static gboolean gst_avi_demux_do_seek (GstAviDemux * avi, GstSegment * segment) { GstClockTime seek_time; gboolean keyframe; gst_avi_index_entry *entry, *kentry; gint old_entry; seek_time = segment->last_stop; keyframe = !!(segment->flags & GST_SEEK_FLAG_KEY_UNIT); /* FIXME: if we seek in an openDML file, we will have multiple * primary levels. Seeking in between those will cause havoc. */ /* save old position so we can see if we must mark a discont. */ old_entry = avi->current_entry; /* get the entry for the requested position, which is always in last_stop. * we search the index entry for stream 0, since all entries are sorted by * time and stream we automagically are positioned for the other streams as * well. FIXME, this code assumes the main stream with keyframes is stream 0, * which is mostly correct... */ if (!(entry = gst_avi_demux_index_entry_for_time (avi, 0, seek_time))) goto no_entry; GST_DEBUG_OBJECT (avi, "Got requested entry %d [stream:%d / ts:%" GST_TIME_FORMAT " / duration:%" GST_TIME_FORMAT "]", entry->index_nr, entry->stream_nr, GST_TIME_ARGS (entry->ts), GST_TIME_ARGS (entry->dur)); /* check if we are already on a keyframe */ if (!(entry->flags & GST_AVI_INDEX_ENTRY_FLAG_KEYFRAME)) { /* now go to the previous keyframe, this is where we should start * decoding from. */ if (!(kentry = gst_avi_demux_index_prev (avi, 0, entry->index_nr, GST_AVI_INDEX_ENTRY_FLAG_KEYFRAME))) { goto no_entry; } } else { /* we were on a keyframe */ kentry = entry; } GST_DEBUG_OBJECT (avi, "Got keyframe entry %d [stream:%d / ts:%" GST_TIME_FORMAT " / duration:%" GST_TIME_FORMAT "]", kentry->index_nr, entry->stream_nr, GST_TIME_ARGS (kentry->ts), GST_TIME_ARGS (kentry->dur)); /* we must start decoding at the keyframe */ avi->current_entry = kentry->index_nr; if (segment->rate < 0.0) { gst_avi_index_entry *next_keyframe; /* Because we don't know the frame order we need to push from the prev keyframe * to the next keyframe. If there is a smart decoder downstream he will notice * that there are too many encoded frames send and return UNEXPECTED when there * are enough decoded frames to fill the segment. */ next_keyframe = gst_avi_demux_index_next (avi, 0, kentry->index_nr, GST_AVI_INDEX_ENTRY_FLAG_KEYFRAME); if (!next_keyframe) next_keyframe = gst_avi_demux_index_last (avi, 0); avi->reverse_start_index = kentry->index_nr; avi->reverse_stop_index = next_keyframe->index_nr; GST_DEBUG_OBJECT (avi, "reverse seek: start idx (%d) and stop idx (%d)", avi->reverse_start_index, avi->reverse_stop_index); } if (keyframe) { /* when seeking to a keyframe, we update the result seek time * to the time of the keyframe. */ seek_time = avi->index_entries[avi->current_entry].ts; } next: /* if we changed position, mark a DISCONT on all streams */ if (avi->current_entry != old_entry) { gint i; for (i = 0; i < avi->num_streams; i++) { avi->stream[i].discont = TRUE; } } GST_DEBUG_OBJECT (avi, "seek: %" GST_TIME_FORMAT " keyframe seeking:%d", GST_TIME_ARGS (seek_time), keyframe); /* the seek time is also the last_stop and stream time */ segment->last_stop = seek_time; segment->time = seek_time; return TRUE; no_entry: { /* we could not find an entry for the given time */ GST_WARNING_OBJECT (avi, "Couldn't find AviIndexEntry for time:%" GST_TIME_FORMAT, GST_TIME_ARGS (seek_time)); if (avi->current_entry >= avi->index_size && avi->index_size > 0) avi->current_entry = avi->index_size - 1; goto next; } } /* * Handle seek event. */ static gboolean gst_avi_demux_handle_seek (GstAviDemux * avi, GstPad * pad, GstEvent * event) { gboolean res; gdouble rate; GstFormat format; GstSeekFlags flags; GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type; gint64 cur, stop; gboolean flush; gboolean update; GstSegment seeksegment = { 0, }; if (event) { GST_DEBUG_OBJECT (avi, "doing seek with event"); gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur, &stop_type, &stop); /* we have to have a format as the segment format. Try to convert * if not. */ if (format != GST_FORMAT_TIME) { GstFormat fmt; fmt = GST_FORMAT_TIME; res = TRUE; if (cur_type != GST_SEEK_TYPE_NONE) res = gst_pad_query_convert (pad, format, cur, &fmt, &cur); if (res && stop_type != GST_SEEK_TYPE_NONE) res = gst_pad_query_convert (pad, format, stop, &fmt, &stop); if (!res) goto no_format; format = fmt; } GST_DEBUG_OBJECT (avi, "seek requested: rate %g cur %" GST_TIME_FORMAT " stop %" GST_TIME_FORMAT, rate, GST_TIME_ARGS (cur), GST_TIME_ARGS (stop)); /* FIXME: can we do anything with rate!=1.0 */ } else { GST_DEBUG_OBJECT (avi, "doing seek without event"); flags = 0; rate = 1.0; } /* save flush flag */ flush = flags & GST_SEEK_FLAG_FLUSH; if (flush) { GstEvent *event = gst_event_new_flush_start (); /* for a flushing seek, we send a flush_start on all pads. This will * eventually stop streaming with a WRONG_STATE. We can thus eventually * take the STREAM_LOCK. */ GST_DEBUG_OBJECT (avi, "sending flush start"); gst_avi_demux_push_event (avi, gst_event_ref (event)); gst_pad_push_event (avi->sinkpad, event); } else { /* a non-flushing seek, we PAUSE the task so that we can take the * STREAM_LOCK */ GST_DEBUG_OBJECT (avi, "non flushing seek, pausing task"); gst_pad_pause_task (avi->sinkpad); } /* wait for streaming to stop */ GST_DEBUG_OBJECT (avi, "wait for streaming to stop"); GST_PAD_STREAM_LOCK (avi->sinkpad); /* copy segment, we need this because we still need the old * segment when we close the current segment. */ memcpy (&seeksegment, &avi->segment, sizeof (GstSegment)); if (event) { GST_DEBUG_OBJECT (avi, "configuring seek"); gst_segment_set_seek (&seeksegment, rate, format, flags, cur_type, cur, stop_type, stop, &update); } /* do the seek, seeksegment.last_stop contains the new position, this * actually never fails. */ res = gst_avi_demux_do_seek (avi, &seeksegment); if (flush) { gint i; GST_DEBUG_OBJECT (avi, "sending flush stop"); gst_avi_demux_push_event (avi, gst_event_new_flush_stop ()); gst_pad_push_event (avi->sinkpad, gst_event_new_flush_stop ()); /* reset the last flow and mark discont, FLUSH is always DISCONT */ for (i = 0; i < avi->num_streams; i++) { avi->stream[i].last_flow = GST_FLOW_OK; avi->stream[i].discont = TRUE; } } else if (avi->segment_running) { GstEvent *seg; /* we are running the current segment and doing a non-flushing seek, * close the segment first based on the last_stop. */ GST_DEBUG_OBJECT (avi, "closing running segment %" G_GINT64_FORMAT " to %" G_GINT64_FORMAT, avi->segment.start, avi->segment.last_stop); seg = gst_event_new_new_segment (TRUE, avi->segment.rate, avi->segment.format, avi->segment.start, avi->segment.last_stop, avi->segment.time); gst_avi_demux_push_event (avi, seg); } /* now update the real segment info */ memcpy (&avi->segment, &seeksegment, sizeof (GstSegment)); /* post the SEGMENT_START message when we do segmented playback */ if (avi->segment.flags & GST_SEEK_FLAG_SEGMENT) { gst_element_post_message (GST_ELEMENT (avi), gst_message_new_segment_start (GST_OBJECT (avi), avi->segment.format, avi->segment.last_stop)); } /* prepare for streaming again */ if ((stop = avi->segment.stop) == GST_CLOCK_TIME_NONE) stop = avi->segment.duration; /* queue the segment event for the streaming thread. */ if (avi->seek_event) gst_event_unref (avi->seek_event); if (avi->segment.rate > 0.0) { avi->seek_event = gst_event_new_new_segment (FALSE, avi->segment.rate, avi->segment.format, avi->segment.last_stop, stop, avi->segment.time); } else { avi->seek_event = gst_event_new_new_segment (FALSE, avi->segment.rate, avi->segment.format, avi->segment.start, avi->segment.last_stop, avi->segment.start); } if (!avi->streaming) { avi->segment_running = TRUE; gst_pad_start_task (avi->sinkpad, (GstTaskFunction) gst_avi_demux_loop, avi->sinkpad); } GST_PAD_STREAM_UNLOCK (avi->sinkpad); return TRUE; /* ERRORS */ no_format: { GST_DEBUG_OBJECT (avi, "unsupported format given, seek aborted."); return FALSE; } } /* * Helper for gst_avi_demux_invert() */ static inline void swap_line (guint8 * d1, guint8 * d2, guint8 * tmp, gint bytes) { memcpy (tmp, d1, bytes); memcpy (d1, d2, bytes); memcpy (d2, tmp, bytes); } /* * Invert DIB buffers... Takes existing buffer and * returns either the buffer or a new one (with old * one dereferenced). * FIXME: can't we preallocate tmp? and remember stride, bpp? */ static GstBuffer * gst_avi_demux_invert (avi_stream_context * stream, GstBuffer * buf) { GstStructure *s; gint y, h = stream->strf.vids->height; gint bpp, stride; guint8 *tmp = NULL; s = gst_caps_get_structure (GST_PAD_CAPS (stream->pad), 0); if (!gst_structure_get_int (s, "bpp", &bpp)) { GST_WARNING ("Failed to retrieve depth from caps"); return buf; } stride = stream->strf.vids->width * (bpp / 8); buf = gst_buffer_make_writable (buf); if (GST_BUFFER_SIZE (buf) < (stride * h)) { GST_WARNING ("Buffer is smaller than reported Width x Height x Depth"); return buf; } tmp = g_malloc (stride); for (y = 0; y < h / 2; y++) { swap_line (GST_BUFFER_DATA (buf) + stride * y, GST_BUFFER_DATA (buf) + stride * (h - 1 - y), tmp, stride); } g_free (tmp); return buf; } /* * Returns the aggregated GstFlowReturn. */ static GstFlowReturn gst_avi_demux_combine_flows (GstAviDemux * avi, avi_stream_context * stream, GstFlowReturn ret) { guint i; /* store the value */ stream->last_flow = ret; /* any other error that is not-linked can be returned right away */ if (ret != GST_FLOW_NOT_LINKED) goto done; /* only return NOT_LINKED if all other pads returned NOT_LINKED */ for (i = 0; i < avi->num_streams; i++) { avi_stream_context *ostream = &avi->stream[i]; ret = ostream->last_flow; /* some other return value (must be SUCCESS but we can return * other values as well) */ if (ret != GST_FLOW_NOT_LINKED) goto done; } /* if we get here, all other pads were unlinked and we return * NOT_LINKED then */ done: GST_LOG_OBJECT (avi, "combined return %s", gst_flow_get_name (ret)); return ret; } /* * prepare the avi element for a reverse jump to a prev keyframe * this function will return the start entry. if the function returns * NULL there was no prev keyframe. */ static gst_avi_index_entry * gst_avi_demux_step_reverse (GstAviDemux * avi) { gst_avi_index_entry *entry; gint i; avi->reverse_stop_index = avi->reverse_start_index; entry = gst_avi_demux_index_prev (avi, 0, avi->reverse_stop_index, GST_AVI_INDEX_ENTRY_FLAG_KEYFRAME); if (!entry) { GST_DEBUG_OBJECT (avi, "no valid index entry found index %d", avi->reverse_stop_index); return NULL; } avi->current_entry = avi->reverse_start_index = entry->index_nr; GST_DEBUG_OBJECT (avi, "reverse playback jump: start idx (%d) and stop idx (%d)", avi->reverse_start_index, avi->reverse_stop_index); gst_segment_set_last_stop (&avi->segment, GST_FORMAT_TIME, entry->ts); for (i = 0; i < avi->num_streams; i++) { avi->stream[i].last_flow = GST_FLOW_OK; avi->stream[i].discont = TRUE; } return entry; } /* * Read data from one index entry */ static GstFlowReturn gst_avi_demux_process_next_entry (GstAviDemux * avi) { GstFlowReturn res = GST_FLOW_OK; gboolean processed = FALSE; avi_stream_context *stream; gst_avi_index_entry *entry; GstBuffer *buf; do { /* see if we are at the end */ if ((avi->segment.rate > 0 && avi->current_entry >= avi->index_size)) goto eos; /* get next entry, this will work as we checked for the index size above */ entry = &avi->index_entries[avi->current_entry++]; /* check for reverse playback */ if (avi->segment.rate < 0 && avi->current_entry > avi->reverse_stop_index) { GST_LOG_OBJECT (avi, "stop_index %d reached", avi->reverse_stop_index); /* check if we have pushed enough data for this segment */ if (avi->reverse_start_index == 0) goto eos_reverse_zero; if (avi->index_entries[avi->reverse_start_index].ts < avi->segment.start) goto eos_reverse_segment; if (!(entry = gst_avi_demux_step_reverse (avi))) goto eos; avi->current_entry++; } /* see if we have a valid stream, ignore if not * FIXME: can't we check this when building the index? * we check it in _parse_index(), _stream_scan() */ if (entry->stream_nr >= avi->num_streams) { GST_WARNING_OBJECT (avi, "Entry %d has non-existing stream nr %d", avi->current_entry - 1, entry->stream_nr); continue; } /* get stream now */ stream = &avi->stream[entry->stream_nr]; if (avi->segment.rate > 0.0) { /* only check this for fowards playback for now */ if ((entry->flags & GST_AVI_INDEX_ENTRY_FLAG_KEYFRAME) && GST_CLOCK_TIME_IS_VALID (entry->ts) && GST_CLOCK_TIME_IS_VALID (avi->segment.stop) && (entry->ts > avi->segment.stop)) { goto eos_stop; } } /* skip empty entries */ if (entry->size == 0 || !stream->pad) { GST_DEBUG_OBJECT (avi, "Skipping entry %d (%d, %p)", avi->current_entry - 1, entry->size, stream->pad); goto next; } GST_LOG ("reading buffer (size=%d) from stream %d at current pos %" G_GUINT64_FORMAT " (%llx)", entry->size, entry->stream_nr, avi->index_offset + entry->offset, avi->index_offset + entry->offset); /* pull in the data */ res = gst_pad_pull_range (avi->sinkpad, entry->offset + avi->index_offset, entry->size, &buf); if (res != GST_FLOW_OK) goto pull_failed; /* check for short buffers, this is EOS as well */ if (GST_BUFFER_SIZE (buf) < entry->size) goto short_buffer; /* invert the picture if needed */ if (stream->strh->fcc_handler == GST_MAKE_FOURCC ('D', 'I', 'B', ' ')) buf = gst_avi_demux_invert (stream, buf); /* mark non-keyframes */ if (!(entry->flags & GST_AVI_INDEX_ENTRY_FLAG_KEYFRAME)) GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT); GST_BUFFER_TIMESTAMP (buf) = entry->ts; GST_BUFFER_DURATION (buf) = entry->dur; GST_BUFFER_OFFSET (buf) = GST_BUFFER_OFFSET_NONE; GST_BUFFER_OFFSET_END (buf) = GST_BUFFER_OFFSET_NONE; gst_buffer_set_caps (buf, GST_PAD_CAPS (stream->pad)); GST_DEBUG_OBJECT (avi, "Pushing buffer of size %d and time %" GST_TIME_FORMAT " on pad %s", GST_BUFFER_SIZE (buf), GST_TIME_ARGS (entry->ts), GST_PAD_NAME (stream->pad)); /* update current position in the segment */ gst_segment_set_last_stop (&avi->segment, GST_FORMAT_TIME, entry->ts); /* mark discont when pending */ if (stream->discont) { GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT); stream->discont = FALSE; } res = gst_pad_push (stream->pad, buf); /* mark as processed, we increment the frame and byte counters then * leave the while loop and return the GstFlowReturn */ processed = TRUE; GST_DEBUG_OBJECT (avi, "Processed buffer %d: %s", entry->index_nr, gst_flow_get_name (res)); if (avi->segment.rate < 0 && entry->ts > avi->segment.stop && res == GST_FLOW_UNEXPECTED) { /* In reverse playback we can get a GST_FLOW_UNEXPECTED when * we are at the end of the segment, so we just need to jump * back to the previous section. */ GST_DEBUG_OBJECT (avi, "downstream has reached end of segment"); if (!(entry = gst_avi_demux_step_reverse (avi))) goto eos; res = GST_FLOW_OK; stream->current_frame = entry->frames_before; stream->current_byte = entry->bytes_before; continue; } /* combine flows */ res = gst_avi_demux_combine_flows (avi, stream, res); next: stream->current_frame = entry->frames_before + 1; stream->current_byte = entry->bytes_before + entry->size; } while (!processed); beach: GST_DEBUG_OBJECT (avi, "returning %s", gst_flow_get_name (res)); return res; /* ERRORS */ eos: { GST_LOG_OBJECT (avi, "Handled last index entry, setting EOS (%d > %d)", avi->current_entry, avi->index_size); /* we mark the first stream as EOS */ res = GST_FLOW_UNEXPECTED; goto beach; } eos_stop: { GST_LOG_OBJECT (avi, "Found keyframe after segment," " setting EOS (%" GST_TIME_FORMAT " > %" GST_TIME_FORMAT ")", GST_TIME_ARGS (entry->ts), GST_TIME_ARGS (avi->segment.stop)); res = GST_FLOW_UNEXPECTED; goto beach; } eos_reverse_zero: { GST_DEBUG_OBJECT (avi, "start_index was 0, setting EOS"); res = GST_FLOW_UNEXPECTED; goto beach; } eos_reverse_segment: { GST_DEBUG_OBJECT (avi, "full segment pushed, setting EOS"); res = GST_FLOW_UNEXPECTED; goto beach; } pull_failed: { GST_DEBUG_OBJECT (avi, "pull range failed: pos=%" G_GUINT64_FORMAT " size=%d", entry->offset + avi->index_offset, entry->size); goto beach; } short_buffer: { GST_WARNING_OBJECT (avi, "Short read at offset %" G_GUINT64_FORMAT ", only got %d/%d bytes (truncated file?)", entry->offset + avi->index_offset, GST_BUFFER_SIZE (buf), entry->size); gst_buffer_unref (buf); res = GST_FLOW_UNEXPECTED; goto beach; } } /* * Read data. If we have an index it delegates to * gst_avi_demux_process_next_entry(). */ static GstFlowReturn gst_avi_demux_stream_data (GstAviDemux * avi) { guint32 tag = 0; guint32 size = 0; gint stream_nr = 0; GstFlowReturn res = GST_FLOW_OK; GstFormat format = GST_FORMAT_TIME; /* if we have a avi->index_entries[], we don't want to read * the stream linearly, but seek to the next ts/index_entry. */ if (avi->index_entries != NULL) return gst_avi_demux_process_next_entry (avi); if (avi->have_eos) { /* Clean adapter, we're done */ gst_adapter_clear (avi->adapter); return res; } /* if (!gst_avi_demux_sync (avi, &tag, FALSE)) return FALSE; */ /* Iterate until need more data, so adapter won't grow too much */ while (1) { if (!gst_avi_demux_peek_chunk_info (avi, &tag, &size)) { return GST_FLOW_OK; } GST_DEBUG ("Trying chunk (%" GST_FOURCC_FORMAT "), size %d", GST_FOURCC_ARGS (tag), size); if ((tag & 0xff) >= '0' && (tag & 0xff) <= '9' && ((tag >> 8) & 0xff) >= '0' && ((tag >> 8) & 0xff) <= '9') { GST_LOG ("Chunk ok"); } else if ((tag & 0xffff) == (('x' << 8) | 'i')) { GST_DEBUG ("Found sub-index tag"); if (gst_avi_demux_peek_chunk (avi, &tag, &size)) { if ((size > 0) && (size != -1)) { GST_DEBUG (" skipping %d bytes for now", size); gst_adapter_flush (avi->adapter, 8 + size); } } return GST_FLOW_OK; } else if (tag == GST_RIFF_TAG_idx1) { GST_DEBUG ("Found index tag, stream done"); gst_avi_demux_push_event (avi, gst_event_new_eos ()); avi->have_eos = TRUE; return GST_FLOW_OK; } else { GST_DEBUG ("No more stream chunks, send EOS"); gst_avi_demux_push_event (avi, gst_event_new_eos ()); avi->have_eos = TRUE; return GST_FLOW_OK; } if (!gst_avi_demux_peek_chunk (avi, &tag, &size)) { if ((size == 0) || (size == -1)) gst_adapter_flush (avi->adapter, 8); return GST_FLOW_OK; } GST_DEBUG ("chunk ID %" GST_FOURCC_FORMAT ", size %u", GST_FOURCC_ARGS (tag), size); stream_nr = CHUNKID_TO_STREAMNR (tag); if (stream_nr < 0 || stream_nr >= avi->num_streams) { /* recoverable */ GST_WARNING ("Invalid stream ID %d (%" GST_FOURCC_FORMAT ")", stream_nr, GST_FOURCC_ARGS (tag)); avi->offset += 8 + ((size + 1) & ~1); gst_adapter_flush (avi->adapter, 8 + ((size + 1) & ~1)); } else { avi_stream_context *stream; GstClockTime next_ts = 0; GstBuffer *buf; gst_adapter_flush (avi->adapter, 8); /* get buffer */ buf = gst_adapter_take_buffer (avi->adapter, ((size + 1) & ~1)); /* patch the size */ GST_BUFFER_SIZE (buf) = size; avi->offset += 8 + ((size + 1) & ~1); /* get time of this buffer */ stream = &avi->stream[stream_nr]; gst_pad_query_position (stream->pad, &format, (gint64 *) & next_ts); if (format != GST_FORMAT_TIME) goto wrong_format; /* set delay (if any) if (stream->strh->init_frames == stream->current_frame && stream->delay == 0) stream->delay = next_ts; */ stream->current_frame++; stream->current_byte += size; if (!stream->pad) { GST_WARNING ("No pad."); gst_buffer_unref (buf); } else { GstClockTime dur_ts = 0; /* invert the picture if needed */ if (stream->strh->fcc_handler == GST_MAKE_FOURCC ('D', 'I', 'B', ' ')) { buf = gst_avi_demux_invert (stream, buf); } gst_pad_query_position (stream->pad, &format, (gint64 *) & dur_ts); if (format != GST_FORMAT_TIME) goto wrong_format; GST_BUFFER_TIMESTAMP (buf) = next_ts; GST_BUFFER_DURATION (buf) = dur_ts - next_ts; gst_buffer_set_caps (buf, GST_PAD_CAPS (stream->pad)); GST_DEBUG_OBJECT (avi, "Pushing buffer with time=%" GST_TIME_FORMAT " and size %d over pad %s", GST_TIME_ARGS (next_ts), size, GST_PAD_NAME (stream->pad)); /* update current position in the segment */ gst_segment_set_last_stop (&avi->segment, GST_FORMAT_TIME, next_ts); /* mark discont when pending */ if (stream->discont) { GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT); stream->discont = FALSE; } res = gst_pad_push (stream->pad, buf); /* combine flows */ res = gst_avi_demux_combine_flows (avi, stream, res); if (res != GST_FLOW_OK) { GST_DEBUG ("Push failed; %s", gst_flow_get_name (res)); return res; } } } } done: return res; /* ERRORS */ wrong_format: { GST_DEBUG_OBJECT (avi, "format %s != GST_FORMAT_TIME", gst_format_get_name (format)); res = GST_FLOW_ERROR; goto done; } } /* * Send pending tags. */ static void push_tag_lists (GstAviDemux * avi) { guint i; if (!avi->got_tags) return; GST_DEBUG_OBJECT (avi, "Pushing pending tag lists"); for (i = 0; i < avi->num_streams; i++) if (avi->stream[i].pad && avi->stream[i].taglist) { gst_element_found_tags_for_pad (GST_ELEMENT (avi), avi->stream[i].pad, avi->stream[i].taglist); avi->stream[i].taglist = NULL; } if (avi->globaltags) { gst_element_found_tags (GST_ELEMENT (avi), avi->globaltags); avi->globaltags = NULL; } avi->got_tags = FALSE; GST_DEBUG_OBJECT (avi, "Pushed tag lists"); } static void gst_avi_demux_loop (GstPad * pad) { GstFlowReturn res; GstAviDemux *avi = GST_AVI_DEMUX (GST_PAD_PARENT (pad)); switch (avi->state) { case GST_AVI_DEMUX_START: if ((res = gst_avi_demux_stream_init_pull (avi)) != GST_FLOW_OK) { GST_WARNING ("stream_init flow: %s", gst_flow_get_name (res)); goto pause; } avi->state = GST_AVI_DEMUX_HEADER; /* fall-through */ case GST_AVI_DEMUX_HEADER: if ((res = gst_avi_demux_stream_header_pull (avi)) != GST_FLOW_OK) { GST_WARNING ("stream_header flow: %s", gst_flow_get_name (res)); goto pause; } avi->state = GST_AVI_DEMUX_MOVI; break; case GST_AVI_DEMUX_MOVI: if (G_UNLIKELY (avi->seek_event)) { gst_avi_demux_push_event (avi, avi->seek_event); avi->seek_event = NULL; } if (G_UNLIKELY (avi->got_tags)) { push_tag_lists (avi); } /* process each index entry in turn */ res = gst_avi_demux_stream_data (avi); /* pause when error */ if (res != GST_FLOW_OK) { GST_INFO ("stream_movi flow: %s", gst_flow_get_name (res)); goto pause; } break; default: GST_ERROR_OBJECT (avi, "unknown state %d", avi->state); res = GST_FLOW_ERROR; goto pause; } GST_LOG_OBJECT (avi, "state: %d res:%s", avi->state, gst_flow_get_name (res)); return; /* ERRORS */ pause: GST_LOG_OBJECT (avi, "pausing task, reason %s", gst_flow_get_name (res)); avi->segment_running = FALSE; gst_pad_pause_task (avi->sinkpad); if (GST_FLOW_IS_FATAL (res) || (res == GST_FLOW_NOT_LINKED)) { gboolean push_eos = TRUE; if (res == GST_FLOW_UNEXPECTED) { /* handle end-of-stream/segment */ if (avi->segment.flags & GST_SEEK_FLAG_SEGMENT) { gint64 stop; if ((stop = avi->segment.stop) == -1) stop = avi->segment.duration; GST_INFO_OBJECT (avi, "sending segment_done"); gst_element_post_message (GST_ELEMENT (avi), gst_message_new_segment_done (GST_OBJECT (avi), GST_FORMAT_TIME, stop)); push_eos = FALSE; } } else { /* for fatal errors we post an error message */ GST_ELEMENT_ERROR (avi, STREAM, FAILED, (_("Internal data stream error.")), ("streaming stopped, reason %s", gst_flow_get_name (res))); } if (push_eos) { GST_INFO_OBJECT (avi, "sending eos"); if (!(gst_avi_demux_push_event (avi, gst_event_new_eos ()))) { /* if we don't error out here it will hang */ GST_ELEMENT_ERROR (avi, STREAM, FAILED, (_("Internal data stream error.")), ("downstream did not handle EOS")); } } } } static GstFlowReturn gst_avi_demux_chain (GstPad * pad, GstBuffer * buf) { GstFlowReturn res; GstAviDemux *avi = GST_AVI_DEMUX (GST_PAD_PARENT (pad)); GST_DEBUG ("Store %d bytes in adapter", GST_BUFFER_SIZE (buf)); gst_adapter_push (avi->adapter, buf); switch (avi->state) { case GST_AVI_DEMUX_START: if ((res = gst_avi_demux_stream_init_push (avi)) != GST_FLOW_OK) { GST_WARNING ("stream_init flow: %s", gst_flow_get_name (res)); break; } break; case GST_AVI_DEMUX_HEADER: if ((res = gst_avi_demux_stream_header_push (avi)) != GST_FLOW_OK) { GST_WARNING ("stream_header flow: %s", gst_flow_get_name (res)); break; } break; case GST_AVI_DEMUX_MOVI: if (G_UNLIKELY (avi->seek_event)) { gst_avi_demux_push_event (avi, avi->seek_event); avi->seek_event = NULL; } if (G_UNLIKELY (avi->got_tags)) { push_tag_lists (avi); } res = gst_avi_demux_stream_data (avi); break; default: GST_ELEMENT_ERROR (avi, STREAM, FAILED, (NULL), ("Illegal internal state")); res = GST_FLOW_ERROR; break; } GST_DEBUG_OBJECT (avi, "state: %d res:%s", avi->state, gst_flow_get_name (res)); return res; } static gboolean gst_avi_demux_sink_activate (GstPad * sinkpad) { if (gst_pad_check_pull_range (sinkpad)) { GST_DEBUG ("going to pull mode"); return gst_pad_activate_pull (sinkpad, TRUE); } else { GST_DEBUG ("going to push (streaming) mode"); return gst_pad_activate_push (sinkpad, TRUE); } } static gboolean gst_avi_demux_sink_activate_pull (GstPad * sinkpad, gboolean active) { GstAviDemux *avi = GST_AVI_DEMUX (GST_OBJECT_PARENT (sinkpad)); if (active) { avi->segment_running = TRUE; return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_avi_demux_loop, sinkpad); } else { avi->segment_running = FALSE; return gst_pad_stop_task (sinkpad); } } static gboolean gst_avi_demux_activate_push (GstPad * pad, gboolean active) { if (active) { GST_DEBUG ("avi: activating push/chain function"); } else { GST_DEBUG ("avi: deactivating push/chain function"); } return TRUE; } static GstStateChangeReturn gst_avi_demux_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret; GstAviDemux *avi = GST_AVI_DEMUX (element); switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: avi->streaming = FALSE; gst_segment_init (&avi->segment, GST_FORMAT_TIME); 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_PAUSED_TO_READY: gst_avi_demux_reset (avi); break; default: break; } done: return ret; }