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-rw-r--r--libavformat/mvdec.c441
1 files changed, 441 insertions, 0 deletions
diff --git a/libavformat/mvdec.c b/libavformat/mvdec.c
new file mode 100644
index 0000000000..5525233db5
--- /dev/null
+++ b/libavformat/mvdec.c
@@ -0,0 +1,441 @@
+/*
+ * Silicon Graphics Movie demuxer
+ * Copyright (c) 2012 Peter Ross
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Silicon Graphics Movie demuxer
+ */
+
+#include "libavutil/eval.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/rational.h"
+#include "avformat.h"
+#include "internal.h"
+
+typedef struct {
+ int nb_video_tracks;
+ int nb_audio_tracks;
+
+ int eof_count; /**< number of streams that have finished */
+ int stream_index; /**< current stream index */
+ int frame[2]; /**< frame nb for current stream */
+} MvContext;
+
+#define AUDIO_FORMAT_SIGNED 401
+
+static int mv_probe(AVProbeData *p)
+{
+ if (AV_RB32(p->buf) == MKBETAG('M','O','V','I') && AV_RB16(p->buf + 4) < 3)
+ return AVPROBE_SCORE_MAX;
+ return 0;
+}
+
+static char * var_read_string(AVIOContext *pb, int size)
+{
+ char *str = av_malloc(size + 1);
+ int n;
+ if (!str)
+ return NULL;
+ n = avio_get_str(pb, size, str, size + 1);
+ if (n < size)
+ avio_skip(pb, size - n);
+ return str;
+}
+
+static int var_read_int(AVIOContext *pb, int size)
+{
+ int v;
+ char * s = var_read_string(pb, size);
+ if (!s || sscanf(s, "%d", &v) != 1)
+ v = 0;
+ av_free(s);
+ return v;
+}
+
+static AVRational var_read_float(AVIOContext *pb, int size)
+{
+ AVRational v;
+ char * s = var_read_string(pb, size);
+ if (!s)
+ return (AVRational){0, 0};
+ v = av_d2q(av_strtod(s, NULL), INT_MAX);
+ av_free(s);
+ return v;
+}
+
+static void var_read_metadata(AVFormatContext *avctx, const char *tag, int size)
+{
+ char *value = var_read_string(avctx->pb, size);
+ if (value)
+ av_dict_set(&avctx->metadata, tag, value, AV_DICT_DONT_STRDUP_VAL);
+}
+
+static int set_channels(AVFormatContext *avctx, AVStream *st, int channels) {
+ if (channels <= 0) {
+ av_log(avctx, AV_LOG_ERROR, "Channel count %d invalid\n", channels);
+ return AVERROR_INVALIDDATA;
+ }
+ st->codec->channels = channels;
+ st->codec->channel_layout = (st->codec->channels == 1) ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO;
+ return 0;
+}
+
+/**
+ * Parse global variable
+ * @return < 0 if unknown
+ */
+static int parse_global_var(AVFormatContext *avctx, AVStream *st, const char *name, int size)
+{
+ MvContext *mv = avctx->priv_data;
+ AVIOContext *pb = avctx->pb;
+ if (!strcmp(name, "__NUM_I_TRACKS")) {
+ mv->nb_video_tracks = var_read_int(pb, size);
+ } else if (!strcmp(name, "__NUM_A_TRACKS")) {
+ mv->nb_audio_tracks = var_read_int(pb, size);
+ } else if (!strcmp(name, "COMMENT") || !strcmp(name, "TITLE")) {
+ var_read_metadata(avctx, name, size);
+ } else if (!strcmp(name, "LOOP_MODE") || !strcmp(name, "NUM_LOOPS") || !strcmp(name, "OPTIMIZED")) {
+ avio_skip(pb, size); // ignore
+ } else
+ return -1;
+
+ return 0;
+}
+
+/**
+ * Parse audio variable
+ * @return < 0 if unknown
+ */
+static int parse_audio_var(AVFormatContext *avctx, AVStream *st, const char *name, int size)
+{
+ AVIOContext *pb = avctx->pb;
+ if (!strcmp(name, "__DIR_COUNT")) {
+ st->nb_frames = var_read_int(pb, size);
+ } else if (!strcmp(name, "AUDIO_FORMAT")) {
+ st->codec->codec_id = var_read_int(pb, size);
+ } else if (!strcmp(name, "COMPRESSION")) {
+ st->codec->codec_tag = var_read_int(pb, size);
+ } else if (!strcmp(name, "DEFAULT_VOL")) {
+ var_read_metadata(avctx, name, size);
+ } else if (!strcmp(name, "NUM_CHANNELS")) {
+ return set_channels(avctx, st, var_read_int(pb, size));
+ } else if (!strcmp(name, "SAMPLE_RATE")) {
+ st->codec->sample_rate = var_read_int(pb, size);
+ avpriv_set_pts_info(st, 33, 1, st->codec->sample_rate);
+ } else if (!strcmp(name, "SAMPLE_WIDTH")) {
+ st->codec->bits_per_coded_sample = var_read_int(pb, size) * 8;
+ } else
+ return -1;
+ return 0;
+}
+
+/**
+ * Parse video variable
+ * @return < 0 if unknown
+ */
+static int parse_video_var(AVFormatContext *avctx, AVStream *st, const char *name, int size)
+{
+ AVIOContext *pb = avctx->pb;
+ if (!strcmp(name, "__DIR_COUNT")) {
+ st->nb_frames = st->duration = var_read_int(pb, size);
+ } else if (!strcmp(name, "COMPRESSION")) {
+ char * str = var_read_string(pb, size);
+ if (!str)
+ return AVERROR_INVALIDDATA;
+ if (!strcmp(str, "1")) {
+ st->codec->codec_id = AV_CODEC_ID_MVC1;
+ } else if (!strcmp(str, "2")) {
+ st->codec->pix_fmt = AV_PIX_FMT_ABGR;
+ st->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
+ } else if (!strcmp(str, "3")) {
+ st->codec->codec_id = AV_CODEC_ID_SGIRLE;
+ } else if (!strcmp(str, "10")) {
+ st->codec->codec_id = AV_CODEC_ID_MJPEG;
+ } else if (!strcmp(str, "MVC2")) {
+ st->codec->codec_id = AV_CODEC_ID_MVC2;
+ } else {
+ avpriv_request_sample(avctx, "video compression %s", str);
+ }
+ av_free(str);
+ } else if (!strcmp(name, "FPS")) {
+ AVRational fps = var_read_float(pb, size);
+ avpriv_set_pts_info(st, 64, fps.den, fps.num);
+ } else if (!strcmp(name, "HEIGHT")) {
+ st->codec->height = var_read_int(pb, size);
+ } else if (!strcmp(name, "PIXEL_ASPECT")) {
+ st->sample_aspect_ratio = var_read_float(pb, size);
+ av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den,
+ st->sample_aspect_ratio.num, st->sample_aspect_ratio.den, INT_MAX);
+ } else if (!strcmp(name, "WIDTH")) {
+ st->codec->width = var_read_int(pb, size);
+ } else if (!strcmp(name, "ORIENTATION")) {
+ if (var_read_int(pb, size) == 1101) {
+ st->codec->extradata = av_strdup("BottomUp");
+ st->codec->extradata_size = 9;
+ }
+ } else if (!strcmp(name, "Q_SPATIAL") || !strcmp(name, "Q_TEMPORAL")) {
+ var_read_metadata(avctx, name, size);
+ } else if (!strcmp(name, "INTERLACING") || !strcmp(name, "PACKING")) {
+ avio_skip(pb, size); // ignore
+ } else
+ return -1;
+ return 0;
+}
+
+static void read_table(AVFormatContext *avctx, AVStream *st, int (*parse)(AVFormatContext *avctx, AVStream *st, const char *name, int size))
+{
+ int count, i;
+ AVIOContext *pb = avctx->pb;
+ avio_skip(pb, 4);
+ count = avio_rb32(pb);
+ avio_skip(pb, 4);
+ for (i = 0; i < count; i++) {
+ char name[17];
+ int size;
+ avio_read(pb, name, 16);
+ name[sizeof(name) - 1] = 0;
+ size = avio_rb32(pb);
+ if (parse(avctx, st, name, size) < 0) {
+ avpriv_request_sample(avctx, "variable %s", name);
+ avio_skip(pb, size);
+ }
+ }
+}
+
+static void read_index(AVIOContext *pb, AVStream *st)
+{
+ uint64_t timestamp = 0;
+ int i;
+ for (i = 0; i < st->nb_frames; i++) {
+ uint32_t pos = avio_rb32(pb);
+ uint32_t size = avio_rb32(pb);
+ avio_skip(pb, 8);
+ av_add_index_entry(st, pos, timestamp, size, 0, AVINDEX_KEYFRAME);
+ if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+ timestamp += size / (st->codec->channels * 2);
+ } else {
+ timestamp++;
+ }
+ }
+}
+
+static int mv_read_header(AVFormatContext *avctx)
+{
+ MvContext *mv = avctx->priv_data;
+ AVIOContext *pb = avctx->pb;
+ AVStream *ast = NULL, *vst = NULL; //initialization to suppress warning
+ int version, i;
+
+ avio_skip(pb, 4);
+
+ version = avio_rb16(pb);
+ if (version == 2) {
+ uint64_t timestamp;
+ int v;
+ avio_skip(pb, 22);
+
+ /* allocate audio track first to prevent unnecessary seeking
+ (audio packet always precede video packet for a given frame) */
+ ast = avformat_new_stream(avctx, NULL);
+ if (!ast)
+ return AVERROR(ENOMEM);
+
+ vst = avformat_new_stream(avctx, NULL);
+ if (!vst)
+ return AVERROR(ENOMEM);
+ vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ avpriv_set_pts_info(vst, 64, 1, 15);
+ vst->nb_frames = avio_rb32(pb);
+ v = avio_rb32(pb);
+ switch (v) {
+ case 1:
+ vst->codec->codec_id = AV_CODEC_ID_MVC1;
+ break;
+ case 2:
+ vst->codec->pix_fmt = AV_PIX_FMT_ARGB;
+ vst->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
+ break;
+ default:
+ avpriv_request_sample(avctx, "video compression %i", v);
+ break;
+ }
+ vst->codec->codec_tag = 0;
+ vst->codec->width = avio_rb32(pb);
+ vst->codec->height = avio_rb32(pb);
+ avio_skip(pb, 12);
+
+ ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ ast->nb_frames = vst->nb_frames;
+ ast->codec->sample_rate = avio_rb32(pb);
+ avpriv_set_pts_info(ast, 33, 1, ast->codec->sample_rate);
+ if (set_channels(avctx, ast, avio_rb32(pb)) < 0)
+ return AVERROR_INVALIDDATA;
+
+ v = avio_rb32(pb);
+ if (v == AUDIO_FORMAT_SIGNED) {
+ ast->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
+ } else {
+ avpriv_request_sample(avctx, "audio compression (format %i)", v);
+ }
+
+ avio_skip(pb, 12);
+ var_read_metadata(avctx, "title", 0x80);
+ var_read_metadata(avctx, "comment", 0x100);
+ avio_skip(pb, 0x80);
+
+ timestamp = 0;
+ for (i = 0; i < vst->nb_frames; i++) {
+ uint32_t pos = avio_rb32(pb);
+ uint32_t asize = avio_rb32(pb);
+ uint32_t vsize = avio_rb32(pb);
+ avio_skip(pb, 8);
+ av_add_index_entry(ast, pos, timestamp, asize, 0, AVINDEX_KEYFRAME);
+ av_add_index_entry(vst, pos + asize, i, vsize, 0, AVINDEX_KEYFRAME);
+ timestamp += asize / (ast->codec->channels * 2);
+ }
+ } else if (!version && avio_rb16(pb) == 3) {
+ avio_skip(pb, 4);
+
+ read_table(avctx, NULL, parse_global_var);
+
+ if (mv->nb_audio_tracks > 1) {
+ avpriv_request_sample(avctx, "multiple audio streams support");
+ return AVERROR_PATCHWELCOME;
+ } else if (mv->nb_audio_tracks) {
+ ast = avformat_new_stream(avctx, NULL);
+ if (!ast)
+ return AVERROR(ENOMEM);
+ ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ /* temporarily store compression value in codec_tag; format value in codec_id */
+ read_table(avctx, ast, parse_audio_var);
+ if (ast->codec->codec_tag == 100 && ast->codec->codec_id == AUDIO_FORMAT_SIGNED && ast->codec->bits_per_coded_sample == 16) {
+ ast->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
+ } else {
+ avpriv_request_sample(avctx, "audio compression %i (format %i, width %i)",
+ ast->codec->codec_tag, ast->codec->codec_id, ast->codec->bits_per_coded_sample);
+ ast->codec->codec_id = AV_CODEC_ID_NONE;
+ }
+ ast->codec->codec_tag = 0;
+ if (ast->codec->channels <= 0) {
+ av_log(avctx, AV_LOG_ERROR, "No valid channel count found\n");
+ return AVERROR_INVALIDDATA;
+ }
+ }
+
+ if (mv->nb_video_tracks > 1) {
+ avpriv_request_sample(avctx, "multiple video streams support");
+ return AVERROR_PATCHWELCOME;
+ } else if (mv->nb_video_tracks) {
+ vst = avformat_new_stream(avctx, NULL);
+ if (!vst)
+ return AVERROR(ENOMEM);
+ vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ read_table(avctx, vst, parse_video_var);
+ }
+
+ if (mv->nb_audio_tracks)
+ read_index(pb, ast);
+
+ if (mv->nb_video_tracks)
+ read_index(pb, vst);
+ } else {
+ avpriv_request_sample(avctx, "version %i", version);
+ return AVERROR_PATCHWELCOME;
+ }
+
+ return 0;
+}
+
+static int mv_read_packet(AVFormatContext *avctx, AVPacket *pkt)
+{
+ MvContext *mv = avctx->priv_data;
+ AVIOContext *pb = avctx->pb;
+ AVStream *st = avctx->streams[mv->stream_index];
+ const AVIndexEntry *index;
+ int frame = mv->frame[mv->stream_index];
+ int ret;
+ uint64_t pos;
+
+ if (frame < st->nb_index_entries) {
+ index = &st->index_entries[frame];
+ pos = avio_tell(pb);
+ if (index->pos > pos)
+ avio_skip(pb, index->pos - pos);
+ else if (index->pos < pos) {
+ if (!pb->seekable)
+ return AVERROR(EIO);
+ ret = avio_seek(pb, index->pos, SEEK_SET);
+ if (ret < 0)
+ return ret;
+ }
+ ret = av_get_packet(pb, pkt, index->size);
+ if (ret < 0)
+ return ret;
+
+ pkt->stream_index = mv->stream_index;
+ pkt->pts = index->timestamp;
+ pkt->flags |= AV_PKT_FLAG_KEY;
+
+ mv->frame[mv->stream_index]++;
+ mv->eof_count = 0;
+ } else {
+ mv->eof_count++;
+ if (mv->eof_count >= avctx->nb_streams)
+ return AVERROR_EOF;
+ }
+
+ mv->stream_index++;
+ if (mv->stream_index >= avctx->nb_streams)
+ mv->stream_index = 0;
+
+ return 0;
+}
+
+static int mv_read_seek(AVFormatContext *avctx, int stream_index, int64_t timestamp, int flags)
+{
+ MvContext *mv = avctx->priv_data;
+ AVStream *st = avctx->streams[stream_index];
+ int frame, i;
+
+ if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
+ return AVERROR(ENOSYS);
+
+ if (!avctx->pb->seekable)
+ return AVERROR(EIO);
+
+ frame = av_index_search_timestamp(st, timestamp, flags);
+ if (frame < 0)
+ return -1;
+
+ for (i = 0; i < avctx->nb_streams; i++)
+ mv->frame[i] = frame;
+ return 0;
+}
+
+AVInputFormat ff_mv_demuxer = {
+ .name = "mv",
+ .long_name = NULL_IF_CONFIG_SMALL("Silicon Graphics Movie"),
+ .priv_data_size = sizeof(MvContext),
+ .read_probe = mv_probe,
+ .read_header = mv_read_header,
+ .read_packet = mv_read_packet,
+ .read_seek = mv_read_seek,
+};
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