yading@11: /* yading@11: * Silicon Graphics Movie demuxer yading@11: * Copyright (c) 2012 Peter Ross yading@11: * yading@11: * This file is part of FFmpeg. yading@11: * yading@11: * FFmpeg is free software; you can redistribute it and/or yading@11: * modify it under the terms of the GNU Lesser General Public yading@11: * License as published by the Free Software Foundation; either yading@11: * version 2.1 of the License, or (at your option) any later version. yading@11: * yading@11: * FFmpeg is distributed in the hope that it will be useful, yading@11: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@11: * Lesser General Public License for more details. yading@11: * yading@11: * You should have received a copy of the GNU Lesser General Public yading@11: * License along with FFmpeg; if not, write to the Free Software yading@11: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@11: */ yading@11: yading@11: /** yading@11: * @file yading@11: * Silicon Graphics Movie demuxer yading@11: */ yading@11: yading@11: #include "libavutil/eval.h" yading@11: #include "libavutil/intreadwrite.h" yading@11: #include "libavutil/rational.h" yading@11: #include "avformat.h" yading@11: #include "internal.h" yading@11: yading@11: typedef struct { yading@11: int nb_video_tracks; yading@11: int nb_audio_tracks; yading@11: yading@11: int eof_count; /**< number of streams that have finished */ yading@11: int stream_index; /**< current stream index */ yading@11: int frame[2]; /**< frame nb for current stream */ yading@11: } MvContext; yading@11: yading@11: #define AUDIO_FORMAT_SIGNED 401 yading@11: yading@11: static int mv_probe(AVProbeData *p) yading@11: { yading@11: if (AV_RB32(p->buf) == MKBETAG('M','O','V','I') && AV_RB16(p->buf + 4) < 3) yading@11: return AVPROBE_SCORE_MAX; yading@11: return 0; yading@11: } yading@11: yading@11: static char * var_read_string(AVIOContext *pb, int size) yading@11: { yading@11: char *str = av_malloc(size + 1); yading@11: int n; yading@11: if (!str) yading@11: return NULL; yading@11: n = avio_get_str(pb, size, str, size + 1); yading@11: if (n < size) yading@11: avio_skip(pb, size - n); yading@11: return str; yading@11: } yading@11: yading@11: static int var_read_int(AVIOContext *pb, int size) yading@11: { yading@11: int v; yading@11: char * s = var_read_string(pb, size); yading@11: if (!s || sscanf(s, "%d", &v) != 1) yading@11: v = 0; yading@11: av_free(s); yading@11: return v; yading@11: } yading@11: yading@11: static AVRational var_read_float(AVIOContext *pb, int size) yading@11: { yading@11: AVRational v; yading@11: char * s = var_read_string(pb, size); yading@11: if (!s) yading@11: return (AVRational){0, 0}; yading@11: v = av_d2q(av_strtod(s, NULL), INT_MAX); yading@11: av_free(s); yading@11: return v; yading@11: } yading@11: yading@11: static void var_read_metadata(AVFormatContext *avctx, const char *tag, int size) yading@11: { yading@11: char *value = var_read_string(avctx->pb, size); yading@11: if (value) yading@11: av_dict_set(&avctx->metadata, tag, value, AV_DICT_DONT_STRDUP_VAL); yading@11: } yading@11: yading@11: static int set_channels(AVFormatContext *avctx, AVStream *st, int channels) { yading@11: if (channels <= 0) { yading@11: av_log(avctx, AV_LOG_ERROR, "Channel count %d invalid\n", channels); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: st->codec->channels = channels; yading@11: st->codec->channel_layout = (st->codec->channels == 1) ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO; yading@11: return 0; yading@11: } yading@11: yading@11: /** yading@11: * Parse global variable yading@11: * @return < 0 if unknown yading@11: */ yading@11: static int parse_global_var(AVFormatContext *avctx, AVStream *st, const char *name, int size) yading@11: { yading@11: MvContext *mv = avctx->priv_data; yading@11: AVIOContext *pb = avctx->pb; yading@11: if (!strcmp(name, "__NUM_I_TRACKS")) { yading@11: mv->nb_video_tracks = var_read_int(pb, size); yading@11: } else if (!strcmp(name, "__NUM_A_TRACKS")) { yading@11: mv->nb_audio_tracks = var_read_int(pb, size); yading@11: } else if (!strcmp(name, "COMMENT") || !strcmp(name, "TITLE")) { yading@11: var_read_metadata(avctx, name, size); yading@11: } else if (!strcmp(name, "LOOP_MODE") || !strcmp(name, "NUM_LOOPS") || !strcmp(name, "OPTIMIZED")) { yading@11: avio_skip(pb, size); // ignore yading@11: } else yading@11: return -1; yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: /** yading@11: * Parse audio variable yading@11: * @return < 0 if unknown yading@11: */ yading@11: static int parse_audio_var(AVFormatContext *avctx, AVStream *st, const char *name, int size) yading@11: { yading@11: AVIOContext *pb = avctx->pb; yading@11: if (!strcmp(name, "__DIR_COUNT")) { yading@11: st->nb_frames = var_read_int(pb, size); yading@11: } else if (!strcmp(name, "AUDIO_FORMAT")) { yading@11: st->codec->codec_id = var_read_int(pb, size); yading@11: } else if (!strcmp(name, "COMPRESSION")) { yading@11: st->codec->codec_tag = var_read_int(pb, size); yading@11: } else if (!strcmp(name, "DEFAULT_VOL")) { yading@11: var_read_metadata(avctx, name, size); yading@11: } else if (!strcmp(name, "NUM_CHANNELS")) { yading@11: return set_channels(avctx, st, var_read_int(pb, size)); yading@11: } else if (!strcmp(name, "SAMPLE_RATE")) { yading@11: st->codec->sample_rate = var_read_int(pb, size); yading@11: avpriv_set_pts_info(st, 33, 1, st->codec->sample_rate); yading@11: } else if (!strcmp(name, "SAMPLE_WIDTH")) { yading@11: st->codec->bits_per_coded_sample = var_read_int(pb, size) * 8; yading@11: } else yading@11: return -1; yading@11: return 0; yading@11: } yading@11: yading@11: /** yading@11: * Parse video variable yading@11: * @return < 0 if unknown yading@11: */ yading@11: static int parse_video_var(AVFormatContext *avctx, AVStream *st, const char *name, int size) yading@11: { yading@11: AVIOContext *pb = avctx->pb; yading@11: if (!strcmp(name, "__DIR_COUNT")) { yading@11: st->nb_frames = st->duration = var_read_int(pb, size); yading@11: } else if (!strcmp(name, "COMPRESSION")) { yading@11: char * str = var_read_string(pb, size); yading@11: if (!str) yading@11: return AVERROR_INVALIDDATA; yading@11: if (!strcmp(str, "1")) { yading@11: st->codec->codec_id = AV_CODEC_ID_MVC1; yading@11: } else if (!strcmp(str, "2")) { yading@11: st->codec->pix_fmt = AV_PIX_FMT_ABGR; yading@11: st->codec->codec_id = AV_CODEC_ID_RAWVIDEO; yading@11: } else if (!strcmp(str, "3")) { yading@11: st->codec->codec_id = AV_CODEC_ID_SGIRLE; yading@11: } else if (!strcmp(str, "10")) { yading@11: st->codec->codec_id = AV_CODEC_ID_MJPEG; yading@11: } else if (!strcmp(str, "MVC2")) { yading@11: st->codec->codec_id = AV_CODEC_ID_MVC2; yading@11: } else { yading@11: avpriv_request_sample(avctx, "video compression %s", str); yading@11: } yading@11: av_free(str); yading@11: } else if (!strcmp(name, "FPS")) { yading@11: AVRational fps = var_read_float(pb, size); yading@11: avpriv_set_pts_info(st, 64, fps.den, fps.num); yading@11: } else if (!strcmp(name, "HEIGHT")) { yading@11: st->codec->height = var_read_int(pb, size); yading@11: } else if (!strcmp(name, "PIXEL_ASPECT")) { yading@11: st->sample_aspect_ratio = var_read_float(pb, size); yading@11: av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den, yading@11: st->sample_aspect_ratio.num, st->sample_aspect_ratio.den, INT_MAX); yading@11: } else if (!strcmp(name, "WIDTH")) { yading@11: st->codec->width = var_read_int(pb, size); yading@11: } else if (!strcmp(name, "ORIENTATION")) { yading@11: if (var_read_int(pb, size) == 1101) { yading@11: st->codec->extradata = av_strdup("BottomUp"); yading@11: st->codec->extradata_size = 9; yading@11: } yading@11: } else if (!strcmp(name, "Q_SPATIAL") || !strcmp(name, "Q_TEMPORAL")) { yading@11: var_read_metadata(avctx, name, size); yading@11: } else if (!strcmp(name, "INTERLACING") || !strcmp(name, "PACKING")) { yading@11: avio_skip(pb, size); // ignore yading@11: } else yading@11: return -1; yading@11: return 0; yading@11: } yading@11: yading@11: static void read_table(AVFormatContext *avctx, AVStream *st, int (*parse)(AVFormatContext *avctx, AVStream *st, const char *name, int size)) yading@11: { yading@11: int count, i; yading@11: AVIOContext *pb = avctx->pb; yading@11: avio_skip(pb, 4); yading@11: count = avio_rb32(pb); yading@11: avio_skip(pb, 4); yading@11: for (i = 0; i < count; i++) { yading@11: char name[17]; yading@11: int size; yading@11: avio_read(pb, name, 16); yading@11: name[sizeof(name) - 1] = 0; yading@11: size = avio_rb32(pb); yading@11: if (parse(avctx, st, name, size) < 0) { yading@11: avpriv_request_sample(avctx, "variable %s", name); yading@11: avio_skip(pb, size); yading@11: } yading@11: } yading@11: } yading@11: yading@11: static void read_index(AVIOContext *pb, AVStream *st) yading@11: { yading@11: uint64_t timestamp = 0; yading@11: int i; yading@11: for (i = 0; i < st->nb_frames; i++) { yading@11: uint32_t pos = avio_rb32(pb); yading@11: uint32_t size = avio_rb32(pb); yading@11: avio_skip(pb, 8); yading@11: av_add_index_entry(st, pos, timestamp, size, 0, AVINDEX_KEYFRAME); yading@11: if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { yading@11: timestamp += size / (st->codec->channels * 2); yading@11: } else { yading@11: timestamp++; yading@11: } yading@11: } yading@11: } yading@11: yading@11: static int mv_read_header(AVFormatContext *avctx) yading@11: { yading@11: MvContext *mv = avctx->priv_data; yading@11: AVIOContext *pb = avctx->pb; yading@11: AVStream *ast = NULL, *vst = NULL; //initialization to suppress warning yading@11: int version, i; yading@11: yading@11: avio_skip(pb, 4); yading@11: yading@11: version = avio_rb16(pb); yading@11: if (version == 2) { yading@11: uint64_t timestamp; yading@11: int v; yading@11: avio_skip(pb, 22); yading@11: yading@11: /* allocate audio track first to prevent unnecessary seeking yading@11: (audio packet always precede video packet for a given frame) */ yading@11: ast = avformat_new_stream(avctx, NULL); yading@11: if (!ast) yading@11: return AVERROR(ENOMEM); yading@11: yading@11: vst = avformat_new_stream(avctx, NULL); yading@11: if (!vst) yading@11: return AVERROR(ENOMEM); yading@11: vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; yading@11: avpriv_set_pts_info(vst, 64, 1, 15); yading@11: vst->nb_frames = avio_rb32(pb); yading@11: v = avio_rb32(pb); yading@11: switch (v) { yading@11: case 1: yading@11: vst->codec->codec_id = AV_CODEC_ID_MVC1; yading@11: break; yading@11: case 2: yading@11: vst->codec->pix_fmt = AV_PIX_FMT_ARGB; yading@11: vst->codec->codec_id = AV_CODEC_ID_RAWVIDEO; yading@11: break; yading@11: default: yading@11: avpriv_request_sample(avctx, "video compression %i", v); yading@11: break; yading@11: } yading@11: vst->codec->codec_tag = 0; yading@11: vst->codec->width = avio_rb32(pb); yading@11: vst->codec->height = avio_rb32(pb); yading@11: avio_skip(pb, 12); yading@11: yading@11: ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; yading@11: ast->nb_frames = vst->nb_frames; yading@11: ast->codec->sample_rate = avio_rb32(pb); yading@11: avpriv_set_pts_info(ast, 33, 1, ast->codec->sample_rate); yading@11: if (set_channels(avctx, ast, avio_rb32(pb)) < 0) yading@11: return AVERROR_INVALIDDATA; yading@11: yading@11: v = avio_rb32(pb); yading@11: if (v == AUDIO_FORMAT_SIGNED) { yading@11: ast->codec->codec_id = AV_CODEC_ID_PCM_S16BE; yading@11: } else { yading@11: avpriv_request_sample(avctx, "audio compression (format %i)", v); yading@11: } yading@11: yading@11: avio_skip(pb, 12); yading@11: var_read_metadata(avctx, "title", 0x80); yading@11: var_read_metadata(avctx, "comment", 0x100); yading@11: avio_skip(pb, 0x80); yading@11: yading@11: timestamp = 0; yading@11: for (i = 0; i < vst->nb_frames; i++) { yading@11: uint32_t pos = avio_rb32(pb); yading@11: uint32_t asize = avio_rb32(pb); yading@11: uint32_t vsize = avio_rb32(pb); yading@11: avio_skip(pb, 8); yading@11: av_add_index_entry(ast, pos, timestamp, asize, 0, AVINDEX_KEYFRAME); yading@11: av_add_index_entry(vst, pos + asize, i, vsize, 0, AVINDEX_KEYFRAME); yading@11: timestamp += asize / (ast->codec->channels * 2); yading@11: } yading@11: } else if (!version && avio_rb16(pb) == 3) { yading@11: avio_skip(pb, 4); yading@11: yading@11: read_table(avctx, NULL, parse_global_var); yading@11: yading@11: if (mv->nb_audio_tracks > 1) { yading@11: avpriv_request_sample(avctx, "multiple audio streams support"); yading@11: return AVERROR_PATCHWELCOME; yading@11: } else if (mv->nb_audio_tracks) { yading@11: ast = avformat_new_stream(avctx, NULL); yading@11: if (!ast) yading@11: return AVERROR(ENOMEM); yading@11: ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; yading@11: /* temporarily store compression value in codec_tag; format value in codec_id */ yading@11: read_table(avctx, ast, parse_audio_var); yading@11: if (ast->codec->codec_tag == 100 && ast->codec->codec_id == AUDIO_FORMAT_SIGNED && ast->codec->bits_per_coded_sample == 16) { yading@11: ast->codec->codec_id = AV_CODEC_ID_PCM_S16BE; yading@11: } else { yading@11: avpriv_request_sample(avctx, "audio compression %i (format %i, width %i)", yading@11: ast->codec->codec_tag, ast->codec->codec_id, ast->codec->bits_per_coded_sample); yading@11: ast->codec->codec_id = AV_CODEC_ID_NONE; yading@11: } yading@11: ast->codec->codec_tag = 0; yading@11: if (ast->codec->channels <= 0) { yading@11: av_log(avctx, AV_LOG_ERROR, "No valid channel count found\n"); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: } yading@11: yading@11: if (mv->nb_video_tracks > 1) { yading@11: avpriv_request_sample(avctx, "multiple video streams support"); yading@11: return AVERROR_PATCHWELCOME; yading@11: } else if (mv->nb_video_tracks) { yading@11: vst = avformat_new_stream(avctx, NULL); yading@11: if (!vst) yading@11: return AVERROR(ENOMEM); yading@11: vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; yading@11: read_table(avctx, vst, parse_video_var); yading@11: } yading@11: yading@11: if (mv->nb_audio_tracks) yading@11: read_index(pb, ast); yading@11: yading@11: if (mv->nb_video_tracks) yading@11: read_index(pb, vst); yading@11: } else { yading@11: avpriv_request_sample(avctx, "version %i", version); yading@11: return AVERROR_PATCHWELCOME; yading@11: } yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int mv_read_packet(AVFormatContext *avctx, AVPacket *pkt) yading@11: { yading@11: MvContext *mv = avctx->priv_data; yading@11: AVIOContext *pb = avctx->pb; yading@11: AVStream *st = avctx->streams[mv->stream_index]; yading@11: const AVIndexEntry *index; yading@11: int frame = mv->frame[mv->stream_index]; yading@11: int ret; yading@11: uint64_t pos; yading@11: yading@11: if (frame < st->nb_index_entries) { yading@11: index = &st->index_entries[frame]; yading@11: pos = avio_tell(pb); yading@11: if (index->pos > pos) yading@11: avio_skip(pb, index->pos - pos); yading@11: else if (index->pos < pos) { yading@11: if (!pb->seekable) yading@11: return AVERROR(EIO); yading@11: ret = avio_seek(pb, index->pos, SEEK_SET); yading@11: if (ret < 0) yading@11: return ret; yading@11: } yading@11: ret = av_get_packet(pb, pkt, index->size); yading@11: if (ret < 0) yading@11: return ret; yading@11: yading@11: pkt->stream_index = mv->stream_index; yading@11: pkt->pts = index->timestamp; yading@11: pkt->flags |= AV_PKT_FLAG_KEY; yading@11: yading@11: mv->frame[mv->stream_index]++; yading@11: mv->eof_count = 0; yading@11: } else { yading@11: mv->eof_count++; yading@11: if (mv->eof_count >= avctx->nb_streams) yading@11: return AVERROR_EOF; yading@11: } yading@11: yading@11: mv->stream_index++; yading@11: if (mv->stream_index >= avctx->nb_streams) yading@11: mv->stream_index = 0; yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int mv_read_seek(AVFormatContext *avctx, int stream_index, int64_t timestamp, int flags) yading@11: { yading@11: MvContext *mv = avctx->priv_data; yading@11: AVStream *st = avctx->streams[stream_index]; yading@11: int frame, i; yading@11: yading@11: if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE)) yading@11: return AVERROR(ENOSYS); yading@11: yading@11: if (!avctx->pb->seekable) yading@11: return AVERROR(EIO); yading@11: yading@11: frame = av_index_search_timestamp(st, timestamp, flags); yading@11: if (frame < 0) yading@11: return -1; yading@11: yading@11: for (i = 0; i < avctx->nb_streams; i++) yading@11: mv->frame[i] = frame; yading@11: return 0; yading@11: } yading@11: yading@11: AVInputFormat ff_mv_demuxer = { yading@11: .name = "mv", yading@11: .long_name = NULL_IF_CONFIG_SMALL("Silicon Graphics Movie"), yading@11: .priv_data_size = sizeof(MvContext), yading@11: .read_probe = mv_probe, yading@11: .read_header = mv_read_header, yading@11: .read_packet = mv_read_packet, yading@11: .read_seek = mv_read_seek, yading@11: };