/* GStreamer * Copyright (C) <1999> Erik Walthinsen * * 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 */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gst/riff/riff-media.h" #include "gstavidemux.h" #include "avi-ids.h" 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_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_handle_seek (GstAviDemux * avi, guint64 time); 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 GstElementStateReturn gst_avi_demux_change_state (GstElement * element); static GstElementClass *parent_class = NULL; 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 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 "); GstElementClass *element_class = GST_ELEMENT_CLASS (klass); GstPadTemplate *videosrctempl, *audiosrctempl; GstCaps *audcaps, *vidcaps; audcaps = gst_riff_create_audio_template_caps (); 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 ()); videosrctempl = gst_pad_template_new ("video_%02d", GST_PAD_SRC, GST_PAD_SOMETIMES, vidcaps); 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, 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); GST_DEBUG_CATEGORY_INIT (avidemux_debug, "avidemux", 0, "Demuxer for AVI streams"); parent_class = g_type_class_ref (GST_TYPE_ELEMENT); gstelement_class->change_state = gst_avi_demux_change_state; } static void gst_avi_demux_init (GstAviDemux * avi) { avi->sinkpad = gst_pad_new_from_template (gst_static_pad_template_get (&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_element_add_pad (GST_ELEMENT (avi), avi->sinkpad); gst_avi_demux_reset (avi); avi->index_entries = NULL; memset (&avi->stream, 0, sizeof (avi->stream)); } static void gst_avi_demux_reset (GstAviDemux * avi) { gint i; 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); gst_element_remove_pad (GST_ELEMENT (avi), avi->stream[i].pad); } memset (&avi->stream, 0, sizeof (avi->stream)); avi->num_streams = 0; avi->num_v_streams = 0; avi->num_a_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; avi->seek_offset = (guint64) - 1; if (avi->seek_event) gst_event_unref (avi->seek_event); avi->seek_event = NULL; } static gst_avi_index_entry * gst_avi_demux_index_next (GstAviDemux * avi, gint stream_nr, gint start) { gint i; gst_avi_index_entry *entry = NULL; for (i = start; i < avi->index_size; i++) { entry = &avi->index_entries[i]; if (entry->stream_nr == stream_nr) break; } return entry; } static gst_avi_index_entry * gst_avi_demux_index_entry_for_time (GstAviDemux * avi, gint stream_nr, guint64 time, guint32 flags) { gst_avi_index_entry *entry = NULL, *last_entry = NULL; gint i; i = -1; do { entry = gst_avi_demux_index_next (avi, stream_nr, i + 1); if (!entry) return NULL; i = entry->index_nr; if (entry->ts <= time && (entry->flags & flags) == flags) last_entry = entry; } while (entry->ts < time); return last_entry; } static gst_avi_index_entry * gst_avi_demux_index_entry_for_byte (GstAviDemux * avi, gint stream_nr, guint64 byte, guint32 flags) { gst_avi_index_entry *entry = NULL, *last_entry = NULL; gint i; i = -1; do { entry = gst_avi_demux_index_next (avi, stream_nr, i + 1); if (!entry) return NULL; i = entry->index_nr; if (entry->bytes_before <= byte && (entry->flags & flags) == flags) last_entry = entry; } while (entry->bytes_before < byte); return last_entry; } static gst_avi_index_entry * gst_avi_demux_index_entry_for_frame (GstAviDemux * avi, gint stream_nr, guint32 frame, guint32 flags) { gst_avi_index_entry *entry = NULL, *last_entry = NULL; gint i; i = -1; do { entry = gst_avi_demux_index_next (avi, stream_nr, i + 1); if (!entry) return NULL; i = entry->index_nr; if (entry->frames_before <= frame && (entry->flags & flags) == flags) last_entry = entry; } while (entry->frames_before < frame); return last_entry; } #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; avi_stream_context *stream = gst_pad_get_element_private (pad); if (src_format == *dest_format) { *dest_value = src_value; return TRUE; } if (!stream->strh || !stream->strf.data) return FALSE; if (stream->strh->type == GST_RIFF_FCC_vids && (src_format == GST_FORMAT_BYTES || *dest_format == GST_FORMAT_BYTES)) return FALSE; switch (src_format) { case GST_FORMAT_TIME: switch (*dest_format) { case GST_FORMAT_BYTES: *dest_value = src_value * stream->strf.auds->av_bps / GST_SECOND; break; case GST_FORMAT_DEFAULT: *dest_value = 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 = ((gfloat) src_value) * GST_SECOND / 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 = ((((gfloat) src_value) * stream->strh->scale) / stream->strh->rate) * GST_SECOND; break; default: res = FALSE; break; } break; default: res = FALSE; } return res; } static const GstQueryType * gst_avi_demux_get_src_query_types (GstPad * pad) { static const GstQueryType src_types[] = { GST_QUERY_POSITION, 0 }; return src_types; } static gboolean gst_avi_demux_handle_src_query (GstPad * pad, GstQuery * query) { gboolean res = TRUE; GstAviDemux *demux = GST_AVI_DEMUX (GST_PAD_PARENT (pad)); avi_stream_context *stream = gst_pad_get_element_private (pad); if (!stream->strh || !stream->strf.data) return FALSE; switch (GST_QUERY_TYPE (query)) { case GST_QUERY_POSITION:{ gint64 len, pos = 0; len = (((gfloat) stream->strh->scale) * stream->strh->length / stream->strh->rate) * GST_SECOND; if (stream->strh->type == GST_RIFF_FCC_auds) { if (!stream->strh->samplesize) { pos = GST_SECOND * stream->current_frame * stream->strh->scale / stream->strh->rate; } else if (stream->strf.auds->av_bps != 0) { pos = ((gfloat) stream->current_byte) * GST_SECOND / stream->strf.auds->av_bps; } else if (stream->total_frames != 0 && stream->total_bytes != 0) { /* calculate timestamps based on video size */ guint64 xlen = demux->avih->us_frame * demux->avih->tot_frames * GST_USECOND; if (!stream->strh->samplesize) pos = xlen * stream->current_frame / stream->total_frames; else pos = xlen * stream->current_byte / stream->total_bytes; } else { res = FALSE; } } else { if (stream->strh->rate != 0) { pos = ((gfloat) stream->current_frame * stream->strh->scale * GST_SECOND / stream->strh->rate); } else { pos = stream->current_frame * demux->avih->us_frame * GST_USECOND; } } if (res) gst_query_set_position (query, GST_FORMAT_TIME, pos, len); break; } default: res = FALSE; break; } 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_PARENT (pad)); avi_stream_context *stream; GST_CAT_DEBUG_OBJECT (GST_CAT_EVENT, avi, "have event type %d: %p on src pad", GST_EVENT_TYPE (event), event); if (!avi->index_entries) { GST_CAT_DEBUG_OBJECT (GST_CAT_EVENT, avi, "no index entries, returning"); return FALSE; } stream = gst_pad_get_element_private (pad); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEEK: { GstFormat format; GstSeekFlags flags; gint64 cur, stop; gst_event_parse_seek (event, NULL, &format, &flags, NULL, &cur, NULL, &stop); GST_DEBUG_OBJECT (avi, "seek format %d, %08x", format, stream->strh->type); switch (format) { case GST_FORMAT_BYTES: case GST_FORMAT_DEFAULT: case GST_FORMAT_TIME:{ gst_avi_index_entry *entry = NULL, *real; gint64 desired_offset = cur; guint32 flags; GST_DEBUG_OBJECT (avi, "seeking to %" G_GINT64_FORMAT, desired_offset); flags = GST_RIFF_IF_KEYFRAME; switch (format) { case GST_FORMAT_BYTES: entry = gst_avi_demux_index_entry_for_byte (avi, 0, //stream->num, desired_offset, flags); real = gst_avi_demux_index_entry_for_byte (avi, stream->num, desired_offset, 0); break; case GST_FORMAT_DEFAULT: entry = gst_avi_demux_index_entry_for_frame (avi, 0, //stream->num, desired_offset, flags); real = gst_avi_demux_index_entry_for_frame (avi, stream->num, desired_offset, 0); break; case GST_FORMAT_TIME: entry = gst_avi_demux_index_entry_for_time (avi, 0, //stream->num, desired_offset, flags); real = gst_avi_demux_index_entry_for_time (avi, stream->num, desired_offset, 0); break; default: break; } if (!(flags & GST_SEEK_FLAG_ACCURATE)) real = entry; if (entry) { avi->seek_offset = entry->offset + avi->index_offset; avi->last_seek = real->ts; avi->seek_flush = flags & GST_SEEK_FLAG_FLUSH; avi->seek_entry = entry->index_nr; GST_DEBUG_OBJECT (avi, "Will seek to entry %d", avi->seek_entry); res = gst_avi_demux_handle_seek (avi, real->ts); } else { GST_DEBUG_OBJECT (avi, "no index entry found for format=%d value=%" G_GINT64_FORMAT, format, desired_offset); res = FALSE; } GST_LOG ("seek done"); break; } default: res = FALSE; break; } break; } default: res = FALSE; break; } gst_event_unref (event); return res; } /** * 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. Discards buffer after use. * * 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; if (!gst_riff_parse_file_header (element, buf, &doctype)) return FALSE; if (doctype != GST_RIFF_RIFF_AVI) { GST_ELEMENT_ERROR (element, STREAM, WRONG_TYPE, (NULL), ("File is not an AVI file: " GST_FOURCC_FORMAT, GST_FOURCC_ARGS (doctype))); return FALSE; } return TRUE; } static GstFlowReturn gst_avi_demux_stream_init (GstAviDemux * avi) { GstFlowReturn res; GstBuffer *buf = NULL; if ((res = gst_pad_pull_range (avi->sinkpad, avi->offset, 12, &buf)) != GST_FLOW_OK) return res; else if (!gst_avi_demux_parse_file_header (GST_ELEMENT (avi), buf)) return GST_FLOW_ERROR; avi->offset += 12; return GST_FLOW_OK; } /** * 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 || GST_BUFFER_SIZE (buf) < sizeof (gst_riff_avih)) { GST_ELEMENT_ERROR (element, STREAM, DEMUX, (NULL), ("Too small avih (%d available, %d needed)", GST_BUFFER_SIZE (buf), (int) sizeof (gst_riff_avih))); if (buf) gst_buffer_unref (buf); return FALSE; } 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; } /** * gst_avi_demux_parse_superindex: * @element: 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 (GstElement * element, GstBuffer * buf, guint64 ** _indexes) { guint8 *data = GST_BUFFER_DATA (buf); gint bpe = 16, num, i; guint64 *indexes; *_indexes = NULL; if (!buf || GST_BUFFER_SIZE (buf) < 24) { GST_ERROR_OBJECT (element, "Not enough data to parse superindex (%d available, %d needed)", GST_BUFFER_SIZE (buf), 24); if (buf) gst_buffer_unref (buf); return FALSE; } /* 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 (element, "Superindex for stream %d 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 (GST_BUFFER_SIZE (buf) < 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; } /** * gst_avi_demux_parse_subindex: * @element: caller element (used for errors/debug). * @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 (GstElement * element, GstBuffer * buf, avi_stream_context * stream, GList ** _entries_list) { guint8 *data = GST_BUFFER_DATA (buf); gint bpe, num, x; guint64 baseoff; gst_avi_index_entry *entries, *entry; GList *entries_list = NULL; GstFormat format = GST_FORMAT_TIME; gint64 tmp; /* check size */ if (!buf || GST_BUFFER_SIZE (buf) < 24) { GST_ERROR_OBJECT (element, "Not enough data to parse subindex (%d available, %d needed)", GST_BUFFER_SIZE (buf), 24); if (buf) gst_buffer_unref (buf); *_entries_list = NULL; return TRUE; /* continue */ } /* We don't support index-data yet */ if (data[3] & 0x80) { GST_ELEMENT_ERROR (element, STREAM, NOT_IMPLEMENTED, (NULL), ("Subindex-is-data is not implemented")); gst_buffer_unref (buf); return FALSE; } /* 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 (element, "Superindex for stream %d 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]); baseoff = GST_READ_UINT64_LE (&data[12]); entries = g_new (gst_avi_index_entry, num); for (x = 0; x < num; x++) { entry = &entries[x]; if (GST_BUFFER_SIZE (buf) < 24 + bpe * (x + 1)) break; /* fill in */ entry->offset = baseoff + GST_READ_UINT32_LE (&data[24 + bpe * x]); entry->size = GST_READ_UINT32_LE (&data[24 + bpe * x + 4]); entry->flags = (entry->size & 0x80000000) ? 0 : GST_RIFF_IF_KEYFRAME; entry->size &= ~0x80000000; entry->index_nr = x; entry->stream_nr = stream->num; /* timestamps */ if (stream->strh->samplesize && stream->strh->type == GST_RIFF_FCC_auds) { /* constant rate stream */ gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES, stream->total_bytes, &format, &tmp); entry->ts = tmp; gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES, stream->total_bytes + entry->size, &format, &tmp); entry->dur = tmp; } else { /* VBR stream */ gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT, stream->total_frames, &format, &tmp); entry->ts = tmp; gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT, stream->total_frames + 1, &format, &tmp); entry->dur = tmp; } 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++; entries_list = g_list_prepend (entries_list, entry); } GST_LOG_OBJECT (element, "Read %d index entries", x); gst_buffer_unref (buf); if (x > 0) { *_entries_list = g_list_reverse (entries_list); } else { *_entries_list = NULL; g_free (entries); } return TRUE; } static void gst_avi_demux_read_subindexes (GstAviDemux * avi, GList ** index, GList ** alloc_list) { GList *list; guint32 tag; GstBuffer *buf; gint i, n; 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_ERROR_OBJECT (GST_ELEMENT (avi), "Not an ix## chunk (" GST_FOURCC_FORMAT ")", GST_FOURCC_ARGS (tag)); gst_buffer_unref (buf); continue; } if (!gst_avi_demux_parse_subindex (GST_ELEMENT (avi), buf, stream, &list)) continue; if (list) { *alloc_list = g_list_append (*alloc_list, list->data); *index = g_list_concat (*index, list); } } g_free (stream->indexes); stream->indexes = NULL; } } /** * gst_avi_demux_parse_stream: * @element: 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 (GstElement * element, GstBuffer * buf) { GstAviDemux *avi = GST_AVI_DEMUX (element); avi_stream_context *stream = &avi->stream[avi->num_streams]; GstElementClass *klass = GST_ELEMENT_GET_CLASS (element); 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; GST_DEBUG_OBJECT (element, "Parsing stream"); /* read strh */ if (!buf || !gst_riff_parse_chunk (element, buf, &offset, &tag, &sub) || tag != GST_RIFF_TAG_strh) { GST_ERROR_OBJECT (element, "Failed to find strh chunk (tag: " GST_FOURCC_FORMAT ")", buf ? GST_BUFFER_SIZE (buf) : 0, GST_FOURCC_ARGS (tag)); goto fail; } else if (!gst_riff_parse_strh (element, sub, &stream->strh)) goto fail; /* read strf */ if (!gst_riff_parse_chunk (element, buf, &offset, &tag, &sub) || tag != GST_RIFF_TAG_strf) { GST_ERROR_OBJECT (element, "Failed to find strh chunk (size: %d, tag: " GST_FOURCC_FORMAT ")", buf ? GST_BUFFER_SIZE (buf) : 0, GST_FOURCC_ARGS (tag)); goto fail; } else { gboolean res = FALSE; switch (stream->strh->type) { case GST_RIFF_FCC_vids: res = gst_riff_parse_strf_vids (element, sub, &stream->strf.vids, &stream->extradata); break; case GST_RIFF_FCC_auds: res = gst_riff_parse_strf_auds (element, sub, &stream->strf.auds, &stream->extradata); break; case GST_RIFF_FCC_iavs: res = gst_riff_parse_strf_iavs (element, sub, &stream->strf.iavs, &stream->extradata); break; default: GST_ERROR_OBJECT (element, "Don´t know how to handle stream type " GST_FOURCC_FORMAT, GST_FOURCC_ARGS (stream->strh->type)); break; } if (!res) goto fail; } /* read strd/strn */ while (gst_riff_parse_chunk (element, buf, &offset, &tag, &sub)) { switch (tag) { 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); stream->name = g_new (gchar, GST_BUFFER_SIZE (sub) + 1); memcpy (stream->name, GST_BUFFER_DATA (sub), GST_BUFFER_SIZE (sub)); stream->name[GST_BUFFER_SIZE (sub)] = '\0'; gst_buffer_unref (sub); 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 (element, sub, &stream->indexes); break; } GST_WARNING_OBJECT (element, "Unknown stream header tag " GST_FOURCC_FORMAT ", ignoring", GST_FOURCC_ARGS (tag)); /* fall-through */ case GST_RIFF_TAG_JUNK: gst_buffer_unref (sub); break; } } /* 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: 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 (stream->strf.vids->compression ? stream->strf.vids->compression : stream->strh->fcc_handler, stream->strh, stream->strf.vids, stream->extradata, stream->initdata, &codec_name); 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); tag_name = GST_TAG_AUDIO_CODEC; avi->num_a_streams++; break; case GST_RIFF_FCC_iavs: 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 (stream->strh->fcc_handler, stream->strh, stream->strf.iavs, stream->extradata, stream->initdata, &codec_name); tag_name = GST_TAG_VIDEO_CODEC; avi->num_v_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; } /* set proper settings and add it */ pad = stream->pad = gst_pad_new_from_template (templ, padname); g_free (padname); gst_pad_use_fixed_caps (pad); #if 0 gst_pad_set_formats_function (pad, gst_avi_demux_get_src_formats); gst_pad_set_event_mask_function (pad, gst_avi_demux_get_event_mask); #endif gst_pad_set_event_function (pad, gst_avi_demux_handle_src_event); gst_pad_set_query_type_function (pad, gst_avi_demux_get_src_query_types); gst_pad_set_query_function (pad, gst_avi_demux_handle_src_query); #if 0 gst_pad_set_convert_function (pad, 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; stream->current_entry = -1; gst_pad_set_element_private (pad, stream); avi->num_streams++; gst_pad_set_active (pad, TRUE); gst_pad_set_caps (pad, caps); gst_element_add_pad (GST_ELEMENT (avi), pad); GST_LOG_OBJECT (element, "Added pad %s", gst_pad_get_name (pad)); return TRUE; fail: /* unref any mem that may be in use */ if (buf) gst_buffer_unref (buf); if (sub) gst_buffer_unref (sub); 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: * @element: 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 (GstElement * element, GstBuffer * buf) { GstAviDemux *avi = GST_AVI_DEMUX (element); guint32 tag = 0; guint offset = 4; GstBuffer *sub = NULL; while (gst_riff_parse_chunk (element, buf, &offset, &tag, &sub)) { switch (tag) { case GST_RIFF_TAG_dmlh:{ gst_riff_dmlh dmlh, *_dmlh; if (GST_BUFFER_SIZE (sub) < sizeof (gst_riff_dmlh)) { GST_ERROR_OBJECT (element, "DMLH entry is too small (%d bytes, %d needed)", GST_BUFFER_SIZE (buf), (int) sizeof (gst_riff_dmlh)); gst_buffer_unref (sub); break; } _dmlh = (gst_riff_dmlh *) GST_BUFFER_DATA (buf); dmlh.totalframes = GUINT32_FROM_LE (_dmlh->totalframes); GST_INFO_OBJECT (element, "dmlh tag found:"); GST_INFO_OBJECT (element, " totalframes: %u", dmlh.totalframes); avi->avih->tot_frames = dmlh.totalframes; gst_buffer_unref (sub); break; } default: GST_WARNING_OBJECT (element, "Unknown tag " GST_FOURCC_FORMAT " in ODML header", GST_FOURCC_ARGS (tag)); /* fall-through */ case GST_RIFF_TAG_JUNK: gst_buffer_unref (sub); break; } } gst_buffer_unref (buf); } /** * gst_avi_demux_parse_index: * @element: 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. */ static void gst_avi_demux_parse_index (GstElement * element, GstBuffer * buf, GList ** _entries_list) { GstAviDemux *avi = GST_AVI_DEMUX (element); guint64 pos_before = avi->offset; gst_avi_index_entry *entries = NULL; guint8 *data; GList *entries_list = NULL; guint i, num, n; if (!buf) { *_entries_list = NULL; return; } data = GST_BUFFER_DATA (buf); num = GST_BUFFER_SIZE (buf) / sizeof (gst_riff_index_entry); entries = g_new (gst_avi_index_entry, num); for (i = 0, n = 0; i < num; i++) { gst_riff_index_entry entry, *_entry; avi_stream_context *stream; gint stream_nr; gst_avi_index_entry *target; GstFormat format; gint64 ts; _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 || stream_nr < 0) { GST_WARNING_OBJECT (element, "Index entry %d has invalid stream nr %d", i, stream_nr); continue; } target->stream_nr = stream_nr; stream = &avi->stream[stream_nr]; target->index_nr = i; target->flags = entry.flags; 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; } target->bytes_before = stream->total_bytes; target->frames_before = stream->total_frames; format = GST_FORMAT_TIME; if (stream->strh->type == GST_RIFF_FCC_auds) { /* all audio frames are keyframes */ target->flags |= GST_RIFF_IF_KEYFRAME; } if (stream->strh->samplesize && stream->strh->type == GST_RIFF_FCC_auds) { /* constant rate stream */ gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES, stream->total_bytes, &format, &ts); target->ts = ts; gst_avi_demux_src_convert (stream->pad, GST_FORMAT_BYTES, stream->total_bytes + target->size, &format, &ts); target->dur = ts; } else { /* VBR stream */ gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT, stream->total_frames, &format, &ts); target->ts = ts; gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT, stream->total_frames + 1, &format, &ts); target->dur = ts; } target->dur -= target->ts; stream->total_bytes += target->size; stream->total_frames++; GST_DEBUG ("Adding index entry %d (%d) for stream %d of size %u " "at offset %" G_GUINT64_FORMAT " and time %" GST_TIME_FORMAT, target->index_nr, stream->total_frames - 1, target->stream_nr, target->size, target->offset, GST_TIME_ARGS (target->ts)); entries_list = g_list_prepend (entries_list, target); n++; } *_entries_list = g_list_reverse (entries_list); 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) { guint64 offset = avi->offset; GstBuffer *buf; guint32 tag; gint i; *alloc_list = NULL; *index = NULL; /* get position */ if (gst_pad_pull_range (avi->sinkpad, offset, 8, &buf) != GST_FLOW_OK) return; else if (!buf || GST_BUFFER_SIZE (buf) < 8) { if (buf) gst_buffer_unref (buf); return; } offset += 8 + GST_READ_UINT32_LE (GST_BUFFER_DATA (buf) + 4); gst_buffer_unref (buf); /* get size */ if (gst_riff_read_chunk (GST_ELEMENT (avi), avi->sinkpad, &offset, &tag, &buf) != GST_FLOW_OK) return; else if (tag != GST_RIFF_TAG_idx1) { GST_ERROR_OBJECT (avi, "No index data after movi chunk, but " GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag)); gst_buffer_unref (buf); return; } gst_avi_demux_parse_index (GST_ELEMENT (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; } #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; } /* * 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. */ static gboolean gst_avi_demux_stream_scan (GstAviDemux * avi, GList ** index, GList ** alloc_list) { GstRiffRead *riff = GST_RIFF_READ (avi); gst_avi_index_entry *entry, *entries = NULL; avi_stream_context *stream; guint64 pos = gst_bytestream_tell (riff->bs), length = gst_bytestream_length (riff->bs); guint32 tag; GstEvent *event; GList *list = NULL; guint index_size = 0; /* FIXME: * - implement non-seekable source support. */ if (*index) { GstEvent *event; guint64 off; entry = g_list_last (*index)->data; off = entry->offset + avi->index_offset + entry->size; if (entry->size & 1) off++; if (off < length) { GST_LOG ("Incomplete index, seeking to last valid entry @ %" G_GUINT64_FORMAT " of %" G_GUINT64_FORMAT " (%" G_GUINT64_FORMAT "+%u)", off, length, entry->offset, entry->size); if (!(event = gst_riff_read_seek (riff, off))) return FALSE; gst_event_unref (event); } else { return TRUE; } } GST_LOG_OBJECT (avi, "Creating index"); while (gst_avi_demux_sync (avi, &tag, TRUE)) { gint stream_nr = CHUNKID_TO_STREAMNR (tag); guint8 *data; GstFormat format = GST_FORMAT_TIME; if (stream_nr < 0 || 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; /* 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]; /* fill in */ entry->index_nr = index_size++; entry->stream_nr = stream_nr; entry->flags = GST_RIFF_IF_KEYFRAME; entry->offset = gst_bytestream_tell (riff->bs) + 8 - avi->index_offset; entry->size = GST_READ_UINT32_LE (&data[4]); /* timestamps */ if (stream->strh->samplesize && stream->strh->type == GST_RIFF_FCC_auds) { /* 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); } else { /* 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); } 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); GST_LOG_OBJECT (avi, "index created, %d items", index_size); *index = g_list_concat (*index, g_list_reverse (list)); return TRUE; } #endif /* * Massage index. * 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 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; } static void gst_avi_demux_massage_index (GstAviDemux * avi, GList * list, GList * alloc_list) { gst_avi_index_entry *entry; avi_stream_context *stream; gint i; GList *one; GST_LOG ("Starting index massage"); /* init frames */ for (i = 0; i < avi->num_streams; i++) { GstFormat fmt = GST_FORMAT_TIME; gint64 delay = 0; stream = &avi->stream[i]; if (stream->strh->type == GST_RIFF_FCC_vids) { if (!gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT, stream->strh->init_frames, &fmt, &delay)) { delay = 0; } } else { if (!gst_avi_demux_src_convert (stream->pad, GST_FORMAT_DEFAULT, stream->strh->init_frames, &fmt, &delay)) { delay = 0; } } GST_LOG ("Adding init_time=%" GST_TIME_FORMAT " to stream %d", GST_TIME_ARGS (delay), i); for (one = list; one != NULL; one = one->next) { entry = one->data; if (entry->stream_nr == i) entry->ts += delay; } } GST_LOG ("I'm now going to cut large chunks into smaller pieces"); /* cut chunks in small (seekable) pieces */ for (i = 0; i < avi->num_streams; i++) { if (avi->stream[i].total_frames != 1) continue; for (one = list; one != NULL; one = one->next) { entry = one->data; if (entry->stream_nr != i) continue; #define MAX_DURATION (GST_SECOND / 2) /* 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 = stream->strf.auds->av_bps / 10; gst_avi_index_entry *entries; gint old_size, num_added; GList *one2; /* 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 (one2 = one->next; one2 != NULL; one2 = one2->next) { gst_avi_index_entry *entry2 = one2->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, one->next, entry2); entry = one->data; one = one->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++; } } } } } GST_LOG ("I'm now going to reorder the index entries for time"); /* re-order for time */ list = g_list_sort (list, (GCompareFunc) sort); GST_LOG ("Filling in index array"); avi->index_size = g_list_length (list); avi->index_entries = g_new (gst_avi_index_entry, avi->index_size); for (i = 0, one = list; one != NULL; one = one->next, i++) { entry = one->data; memcpy (&avi->index_entries[i], entry, sizeof (gst_avi_index_entry)); avi->index_entries[i].index_nr = i; } GST_LOG ("Freeing original index list"); g_list_foreach (alloc_list, (GFunc) g_free, NULL); g_list_free (alloc_list); g_list_free (list); for (i = 0; i < avi->num_streams; i++) { GST_LOG ("Stream %d, %d frames, %" G_GUINT64_FORMAT " bytes", i, avi->stream[i].total_frames, avi->stream[i].total_bytes); } GST_LOG ("Index massaging done"); } static gboolean gst_avi_demux_send_event (GstAviDemux * avi, GstEvent * event) { gint i; for (i = 0; i < avi->num_streams; i++) { avi_stream_context *stream = &avi->stream[i]; gst_event_ref (event); gst_pad_push_event (stream->pad, event); } gst_event_unref (event); return TRUE; } /* * Read full AVI headers. */ static GstFlowReturn gst_avi_demux_stream_header (GstAviDemux * avi) { GstFlowReturn res; GstBuffer *buf, *sub = NULL; guint32 tag; GList *index = NULL, *alloc = NULL; guint offset = 4; /* the header consists of a 'hdrl' LIST tag */ if ((res = gst_riff_read_chunk (GST_ELEMENT (avi), avi->sinkpad, &avi->offset, &tag, &buf)) != GST_FLOW_OK) return res; else if (tag != GST_RIFF_TAG_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; } else if (GST_BUFFER_SIZE (buf) < 4 || GST_READ_UINT32_LE (GST_BUFFER_DATA (buf)) != GST_RIFF_LIST_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; } /* the hdrl starts with a 'avih' header */ if (!gst_riff_parse_chunk (GST_ELEMENT (avi), buf, &offset, &tag, &sub) || tag != GST_RIFF_TAG_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; } else if (!gst_avi_demux_parse_avih (GST_ELEMENT (avi), sub, &avi->avih)) { gst_buffer_unref (buf); return GST_FLOW_ERROR; } /* now, read the elements from the header until the end */ while (gst_riff_parse_chunk (GST_ELEMENT (avi), buf, &offset, &tag, &sub)) { switch (tag) { case GST_RIFF_TAG_LIST: if (!sub || GST_BUFFER_SIZE (sub) < 4) { if (sub) gst_buffer_unref (sub); break; } switch (GST_READ_UINT32_LE (GST_BUFFER_DATA (sub))) { case GST_RIFF_LIST_strl: gst_avi_demux_parse_stream (GST_ELEMENT (avi), sub); break; case GST_RIFF_LIST_odml: gst_avi_demux_parse_odml (GST_ELEMENT (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: gst_buffer_unref (sub); break; } 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: gst_buffer_unref (sub); break; } } gst_buffer_unref (buf); /* check parsed streams */ if (avi->num_streams == 0) { GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("No streams found")); return GST_FLOW_ERROR; } 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; if ((res = gst_pad_pull_range (avi->sinkpad, avi->offset, 12, &buf)) != GST_FLOW_OK) return res; else if (!buf || GST_BUFFER_SIZE (buf) < 12) 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 done; case GST_RIFF_LIST_INFO: if ((res = gst_riff_read_chunk (GST_ELEMENT (avi), avi->sinkpad, &avi->offset, &tag, &buf)) != GST_FLOW_OK) return res; else { GstTagList *t; sub = gst_buffer_create_sub (buf, 4, GST_BUFFER_SIZE (buf) - 4); gst_riff_parse_info (GST_ELEMENT (avi), sub, &t); if (t) gst_tag_list_free (t); 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); done: /* create or read stream index (for seeking) */ if (avi->stream[0].indexes != NULL) { gst_avi_demux_read_subindexes (avi, &index, &alloc); } if (!index) { if (avi->avih->flags & GST_RIFF_AVIH_HASINDEX) { gst_avi_demux_stream_index (avi, &index, &alloc); } #if 0 /* some indexes are incomplete, continue streaming from there */ if (!index || avi->stream[0].total_frames < avi->num_frames) { if (!gst_avi_demux_stream_scan (avi, &index, &alloc)) { g_list_foreach (alloc, (GFunc) g_free, NULL); g_list_free (alloc); return FALSE; } } #endif } if (index) { gst_avi_demux_massage_index (avi, index, alloc); } else { g_list_free (index); g_list_foreach (alloc, (GFunc) g_free, NULL); g_list_free (alloc); GST_ELEMENT_ERROR (avi, STREAM, NOT_IMPLEMENTED, (NULL), ("Indexless reading todo")); return GST_FLOW_ERROR; } /* send initial discont */ avi->seek_event = gst_event_new_newsegment (1.0, GST_FORMAT_TIME, (gint64) 0, (gint64) (((gfloat) avi->stream[0].strh->scale) * avi->stream[0].strh->length / avi->stream[0].strh->rate) * GST_SECOND, 0); /* 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; } /* * Handle seek. */ static gboolean gst_avi_demux_handle_seek (GstAviDemux * avi, guint64 time) { /* FIXME: if we seek in an openDML file, we will have multiple * primary levels. Seeking in between those will cause havoc. */ GST_LOG ("Seeking to entry %d", avi->seek_entry); gst_avi_demux_send_event (avi, gst_event_new_flush_start ()); GST_STREAM_LOCK (avi->sinkpad); avi->last_seek = time; avi->current_entry = avi->seek_entry; avi->seek_event = gst_event_new_newsegment (1.0, GST_FORMAT_TIME, time, (gint64) (((gfloat) avi->stream[0].strh->scale) * avi->stream[0].strh->length / avi->stream[0].strh->rate) * GST_SECOND, 0); gst_avi_demux_send_event (avi, gst_event_new_flush_stop ()); gst_pad_start_task (avi->sinkpad, (GstTaskFunction) gst_avi_demux_loop, avi->sinkpad); GST_STREAM_UNLOCK (avi->sinkpad); return TRUE; } static GstFlowReturn gst_avi_demux_process_next_entry (GstAviDemux * avi) { GstFlowReturn res; gboolean processed = FALSE; do { if (avi->current_entry >= avi->index_size) { GST_LOG_OBJECT (avi, "Handled last index entry, setting EOS (%d > %d)", avi->current_entry, avi->index_size); gst_avi_demux_send_event (avi, gst_event_new_eos ()); return GST_FLOW_WRONG_STATE; } else { GstBuffer *buf; gst_avi_index_entry *entry = &avi->index_entries[avi->current_entry++]; avi_stream_context *stream; if (entry->stream_nr >= avi->num_streams) { GST_DEBUG_OBJECT (avi, "Entry has non-existing stream nr %d", entry->stream_nr); continue; } stream = &avi->stream[entry->stream_nr]; 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; } else if (GST_CLOCK_TIME_IS_VALID (avi->last_seek)) { if (stream->strh->type != GST_RIFF_FCC_vids && entry->ts < avi->last_seek) { GST_DEBUG_OBJECT (avi, "Doing keyframe sync"); goto next; } else if (entry->ts >= avi->last_seek) { avi->last_seek = GST_CLOCK_TIME_NONE; } } if ((res = gst_pad_pull_range (avi->sinkpad, entry->offset + avi->index_offset, entry->size, &buf)) != GST_FLOW_OK) return res; else { if (!(entry->flags & GST_RIFF_IF_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_set_caps (buf, GST_PAD_CAPS (stream->pad)); GST_DEBUG_OBJECT (avi, "Processing buffer of size %d and time %" GST_TIME_FORMAT " on pad %s", GST_BUFFER_SIZE (buf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), gst_pad_get_name (stream->pad)); if ((res = gst_pad_push (stream->pad, buf)) != GST_FLOW_OK && res != GST_FLOW_NOT_LINKED) return res; processed = TRUE; } next: stream->current_frame = entry->frames_before + 1; stream->current_byte = entry->bytes_before + entry->size; } } while (!processed); return GST_FLOW_OK; } /* * Read data. */ static GstFlowReturn gst_avi_demux_stream_data (GstAviDemux * avi) { #if 0 if (avi->seek_offset != (guint64) - 1) { if (!gst_avi_demux_handle_seek (avi)) return FALSE; avi->seek_offset = (guint64) - 1; } #endif /* 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 0 if (!gst_avi_demux_sync (avi, &tag, FALSE)) return FALSE; 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)); if (!gst_riff_read_skip (riff)) return FALSE; } else { avi_stream_context *stream; GstClockTime next_ts; GstFormat format; GstBuffer *buf; /* get buffer */ if (!gst_riff_read_data (riff, &tag, &buf)) return FALSE; /* get time of this buffer */ stream = &avi->stream[stream_nr]; format = GST_FORMAT_TIME; gst_pad_query (stream->pad, GST_QUERY_POSITION, &format, &next_ts); /* 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 += GST_BUFFER_SIZE (buf); /* should we skip this data? */ if (stream->skip) { stream->skip--; gst_buffer_unref (buf); } else { if (!stream->pad || !GST_PAD_IS_USABLE (stream->pad)) { gst_buffer_unref (buf); } else { GstClockTime dur_ts; GST_BUFFER_TIMESTAMP (buf) = next_ts; gst_pad_query (stream->pad, GST_QUERY_POSITION, &format, &dur_ts); GST_BUFFER_DURATION (buf) = dur_ts - next_ts; GST_DEBUG_OBJECT (avi, "Pushing buffer with time=%" GST_TIME_FORMAT " over pad %s", GST_TIME_ARGS (next_ts), gst_pad_get_name (stream->pad)); gst_pad_push (stream->pad, GST_DATA (buf)); } } } return TRUE; #endif } static void gst_avi_demux_loop (GstPad * pad) { GstFlowReturn res; GstAviDemux *avi = GST_AVI_DEMUX (GST_PAD_PARENT (pad)); GST_STREAM_LOCK (avi->sinkpad); switch (avi->state) { case GST_AVI_DEMUX_START: if ((res = gst_avi_demux_stream_init (avi)) != GST_FLOW_OK) goto pause; avi->state = GST_AVI_DEMUX_HEADER; /* fall-through */ case GST_AVI_DEMUX_HEADER: if ((res = gst_avi_demux_stream_header (avi)) != GST_FLOW_OK) goto pause; avi->state = GST_AVI_DEMUX_MOVI; break; case GST_AVI_DEMUX_MOVI: if (avi->seek_event) { gst_avi_demux_send_event (avi, avi->seek_event); avi->seek_event = NULL; } if ((res = gst_avi_demux_stream_data (avi)) != GST_FLOW_OK) goto pause; break; default: g_assert_not_reached (); } GST_STREAM_UNLOCK (avi->sinkpad); return; pause: GST_LOG_OBJECT (avi, "pausing task"); gst_pad_pause_task (avi->sinkpad); GST_STREAM_UNLOCK (pad); } static gboolean gst_avi_demux_sink_activate (GstPad * sinkpad) { if (gst_pad_check_pull_range (sinkpad)) return gst_pad_activate_pull (sinkpad, TRUE); return FALSE; } static gboolean gst_avi_demux_sink_activate_pull (GstPad * sinkpad, gboolean active) { if (active) { /* if we have a scheduler we can start the task */ gst_pad_start_task (sinkpad, (GstTaskFunction) gst_avi_demux_loop, sinkpad); } else { gst_pad_stop_task (sinkpad); } return TRUE; } static GstElementStateReturn gst_avi_demux_change_state (GstElement * element) { GstAviDemux *avi = GST_AVI_DEMUX (element); switch (GST_STATE_TRANSITION (element)) { case GST_STATE_PAUSED_TO_READY: gst_avi_demux_reset (avi); break; default: break; } if (GST_ELEMENT_CLASS (parent_class)->change_state) return GST_ELEMENT_CLASS (parent_class)->change_state (element); return GST_STATE_SUCCESS; }