502 lines
16 KiB
C
Executable file
502 lines
16 KiB
C
Executable file
/*
|
|
* 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/channel_layout.h"
|
|
#include "libavutil/eval.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavutil/rational.h"
|
|
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
typedef struct MvContext {
|
|
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
|
|
|
|
int acompression; ///< compression level for audio stream
|
|
int aformat; ///< audio format
|
|
} MvContext;
|
|
|
|
#define AUDIO_FORMAT_SIGNED 401
|
|
|
|
static int mv_probe(const 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)
|
|
{
|
|
int n;
|
|
char *str;
|
|
|
|
if (size < 0 || size == INT_MAX)
|
|
return NULL;
|
|
|
|
str = av_malloc(size + 1);
|
|
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)
|
|
return 0;
|
|
v = strtol(s, NULL, 10);
|
|
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->codecpar->channels = channels;
|
|
st->codecpar->channel_layout = (st->codecpar->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 AVERROR_INVALIDDATA;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Parse audio variable
|
|
* @return < 0 if unknown
|
|
*/
|
|
static int parse_audio_var(AVFormatContext *avctx, AVStream *st,
|
|
const char *name, int size)
|
|
{
|
|
MvContext *mv = avctx->priv_data;
|
|
AVIOContext *pb = avctx->pb;
|
|
if (!strcmp(name, "__DIR_COUNT")) {
|
|
st->nb_frames = var_read_int(pb, size);
|
|
} else if (!strcmp(name, "AUDIO_FORMAT")) {
|
|
mv->aformat = var_read_int(pb, size);
|
|
} else if (!strcmp(name, "COMPRESSION")) {
|
|
mv->acompression = 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->codecpar->sample_rate = var_read_int(pb, size);
|
|
avpriv_set_pts_info(st, 33, 1, st->codecpar->sample_rate);
|
|
} else if (!strcmp(name, "SAMPLE_WIDTH")) {
|
|
st->codecpar->bits_per_coded_sample = var_read_int(pb, size) * 8;
|
|
} else
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
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->codecpar->codec_id = AV_CODEC_ID_MVC1;
|
|
} else if (!strcmp(str, "2")) {
|
|
st->codecpar->format = AV_PIX_FMT_ABGR;
|
|
st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
|
|
} else if (!strcmp(str, "3")) {
|
|
st->codecpar->codec_id = AV_CODEC_ID_SGIRLE;
|
|
} else if (!strcmp(str, "10")) {
|
|
st->codecpar->codec_id = AV_CODEC_ID_MJPEG;
|
|
} else if (!strcmp(str, "MVC2")) {
|
|
st->codecpar->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);
|
|
st->avg_frame_rate = fps;
|
|
} else if (!strcmp(name, "HEIGHT")) {
|
|
st->codecpar->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->codecpar->width = var_read_int(pb, size);
|
|
} else if (!strcmp(name, "ORIENTATION")) {
|
|
if (var_read_int(pb, size) == 1101) {
|
|
st->codecpar->extradata = av_strdup("BottomUp");
|
|
if (!st->codecpar->extradata)
|
|
return AVERROR(ENOMEM);
|
|
st->codecpar->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 AVERROR_INVALIDDATA;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int read_table(AVFormatContext *avctx, AVStream *st,
|
|
int (*parse)(AVFormatContext *avctx, AVStream *st,
|
|
const char *name, int size))
|
|
{
|
|
unsigned count;
|
|
int 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;
|
|
|
|
if (avio_feof(pb))
|
|
return AVERROR_EOF;
|
|
|
|
avio_read(pb, name, 16);
|
|
name[sizeof(name) - 1] = 0;
|
|
size = avio_rb32(pb);
|
|
if (size < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "entry size %d is invalid\n", size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (parse(avctx, st, name, size) < 0) {
|
|
avpriv_request_sample(avctx, "Variable %s", name);
|
|
avio_skip(pb, size);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
|
|
timestamp += size / (st->codecpar->channels * 2LL);
|
|
} 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;
|
|
int ret;
|
|
|
|
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);
|
|
avpriv_set_pts_info(vst, 64, 1, 15);
|
|
vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
vst->avg_frame_rate = av_inv_q(vst->time_base);
|
|
vst->nb_frames = avio_rb32(pb);
|
|
v = avio_rb32(pb);
|
|
switch (v) {
|
|
case 1:
|
|
vst->codecpar->codec_id = AV_CODEC_ID_MVC1;
|
|
break;
|
|
case 2:
|
|
vst->codecpar->format = AV_PIX_FMT_ARGB;
|
|
vst->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
|
|
break;
|
|
default:
|
|
avpriv_request_sample(avctx, "Video compression %i", v);
|
|
break;
|
|
}
|
|
vst->codecpar->codec_tag = 0;
|
|
vst->codecpar->width = avio_rb32(pb);
|
|
vst->codecpar->height = avio_rb32(pb);
|
|
avio_skip(pb, 12);
|
|
|
|
ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
ast->nb_frames = vst->nb_frames;
|
|
ast->codecpar->sample_rate = avio_rb32(pb);
|
|
if (ast->codecpar->sample_rate <= 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid sample rate %d\n", ast->codecpar->sample_rate);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
avpriv_set_pts_info(ast, 33, 1, ast->codecpar->sample_rate);
|
|
if (set_channels(avctx, ast, avio_rb32(pb)) < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
v = avio_rb32(pb);
|
|
if (v == AUDIO_FORMAT_SIGNED) {
|
|
ast->codecpar->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);
|
|
if (avio_feof(pb))
|
|
return AVERROR_INVALIDDATA;
|
|
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->codecpar->channels * 2LL);
|
|
}
|
|
} else if (!version && avio_rb16(pb) == 3) {
|
|
avio_skip(pb, 4);
|
|
|
|
if ((ret = read_table(avctx, NULL, parse_global_var)) < 0)
|
|
return ret;
|
|
|
|
if (mv->nb_audio_tracks < 0 || mv->nb_video_tracks < 0 ||
|
|
(mv->nb_audio_tracks == 0 && mv->nb_video_tracks == 0)) {
|
|
av_log(avctx, AV_LOG_ERROR, "Stream count is invalid.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
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->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
if ((read_table(avctx, ast, parse_audio_var)) < 0)
|
|
return ret;
|
|
if (mv->acompression == 100 &&
|
|
mv->aformat == AUDIO_FORMAT_SIGNED &&
|
|
ast->codecpar->bits_per_coded_sample == 16) {
|
|
ast->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE;
|
|
} else {
|
|
avpriv_request_sample(avctx,
|
|
"Audio compression %i (format %i, sr %i)",
|
|
mv->acompression, mv->aformat,
|
|
ast->codecpar->bits_per_coded_sample);
|
|
ast->codecpar->codec_id = AV_CODEC_ID_NONE;
|
|
}
|
|
if (ast->codecpar->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->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
if ((ret = read_table(avctx, vst, parse_video_var))<0)
|
|
return ret;
|
|
}
|
|
|
|
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];
|
|
int64_t 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 & AVIO_SEEKABLE_NORMAL))
|
|
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;
|
|
|
|
// avoid returning 0 without a packet
|
|
return AVERROR(EAGAIN);
|
|
}
|
|
|
|
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 & AVIO_SEEKABLE_NORMAL))
|
|
return AVERROR(EIO);
|
|
|
|
frame = av_index_search_timestamp(st, timestamp, flags);
|
|
if (frame < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
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,
|
|
};
|