/*
* MPEG1/2 demuxer
- * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
*
* This file is part of FFmpeg.
*
#define MAX_SYNC_SIZE 100000
-static int cdxa_probe(AVProbeData *p)
-{
- /* check file header */
- if (p->buf[0] == 'R' && p->buf[1] == 'I' &&
- p->buf[2] == 'F' && p->buf[3] == 'F' &&
- p->buf[8] == 'C' && p->buf[9] == 'D' &&
- p->buf[10] == 'X' && p->buf[11] == 'A')
- return AVPROBE_SCORE_MAX;
- else
- return 0;
-}
-
static int check_pes(uint8_t *p, uint8_t *end){
int pes1;
int pes2= (p[3] & 0xC0) == 0x80
if((*p&0xC0) == 0x40) p+=2;
if((*p&0xF0) == 0x20){
pes1= p[0]&p[2]&p[4]&1;
- p+=5;
}else if((*p&0xF0) == 0x30){
pes1= p[0]&p[2]&p[4]&p[5]&p[7]&p[9]&1;
- p+=10;
}else
pes1 = *p == 0x0F;
static int mpegps_probe(AVProbeData *p)
{
uint32_t code= -1;
- int sys=0, pspack=0, priv1=0, vid=0, audio=0;
+ int sys=0, pspack=0, priv1=0, vid=0, audio=0, invalid=0;
int i;
int score=0;
- score = cdxa_probe(p);
- if (score > 0) return score;
-
- /* Search for MPEG stream */
for(i=0; i<p->buf_size; i++){
code = (code<<8) + p->buf[i];
if ((code & 0xffffff00) == 0x100) {
- int pes= check_pes(p->buf+i, p->buf+i+p->buf_size);
+ int pes= check_pes(p->buf+i, p->buf+p->buf_size);
if(code == SYSTEM_HEADER_START_CODE) sys++;
else if(code == PRIVATE_STREAM_1) priv1++;
else if(code == PACK_START_CODE) pspack++;
- else if((code & 0xf0) == VIDEO_ID && pes) vid++;
- else if((code & 0xe0) == AUDIO_ID && pes) audio++;
+ else if((code & 0xf0) == VIDEO_ID && pes) vid++;
+ else if((code & 0xe0) == AUDIO_ID && pes) audio++;
+
+ else if((code & 0xf0) == VIDEO_ID && !pes) invalid++;
+ else if((code & 0xe0) == AUDIO_ID && !pes) invalid++;
}
}
- if(vid || audio) /* invalid VDR files nd short PES streams */
+ if(vid+audio > invalid) /* invalid VDR files nd short PES streams */
score= AVPROBE_SCORE_MAX/4;
-//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d len:%d\n", sys, priv1, pspack,vid, audio, p->buf_size);
- if(sys && sys*9 <= pspack*10)
- return AVPROBE_SCORE_MAX/2+2; // +1 for .mpg
- if((priv1 || vid || audio) && (priv1+vid+audio)*9 <= pspack*10)
- return AVPROBE_SCORE_MAX/2+2; // +1 for .mpg
- if((!!vid ^ !!audio) && (audio+vid > 1) && !sys && !pspack && p->buf_size>2048) /* PES stream */
- return AVPROBE_SCORE_MAX/2+2;
+//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d %d len:%d\n", sys, priv1, pspack,vid, audio, invalid, p->buf_size);
+ if(sys>invalid && sys*9 <= pspack*10)
+ return pspack > 2 ? AVPROBE_SCORE_MAX/2+2 : AVPROBE_SCORE_MAX/4; // +1 for .mpg
+ if(pspack > invalid && (priv1+vid+audio)*10 >= pspack*9)
+ return pspack > 2 ? AVPROBE_SCORE_MAX/2+2 : AVPROBE_SCORE_MAX/4; // +1 for .mpg
+ if((!!vid ^ !!audio) && (audio > 4 || vid > 1) && !sys && !pspack && p->buf_size>2048 && vid + audio > invalid) /* PES stream */
+ return (audio > 12 || vid > 3) ? AVPROBE_SCORE_MAX/2+2 : AVPROBE_SCORE_MAX/4;
//02-Penguin.flac has sys:0 priv1:0 pspack:0 vid:0 audio:1
+ //mp3_misidentified_2.mp3 has sys:0 priv1:0 pspack:0 vid:0 audio:6
return score;
}
typedef struct MpegDemuxContext {
int32_t header_state;
unsigned char psm_es_type[256];
+ int sofdec;
} MpegDemuxContext;
static int mpegps_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
MpegDemuxContext *m = s->priv_data;
+ const char *sofdec = "Sofdec";
+ int v, i = 0;
+
m->header_state = 0xff;
s->ctx_flags |= AVFMTCTX_NOHEADER;
+ m->sofdec = -1;
+ do {
+ v = get_byte(s->pb);
+ m->header_state = m->header_state << 8 | v;
+ m->sofdec++;
+ } while (v == sofdec[i] && i++ < 6);
+
+ m->sofdec = (m->sofdec == 6) ? 1 : 0;
+
/* no need to do more */
return 0;
}
static int64_t get_pts(ByteIOContext *pb, int c)
{
- int64_t pts;
- int val;
-
- if (c < 0)
- c = get_byte(pb);
- pts = (int64_t)((c >> 1) & 0x07) << 30;
- val = get_be16(pb);
- pts |= (int64_t)(val >> 1) << 15;
- val = get_be16(pb);
- pts |= (int64_t)(val >> 1);
- return pts;
+ uint8_t buf[5];
+
+ buf[0] = c<0 ? get_byte(pb) : c;
+ get_buffer(pb, buf+1, 4);
+
+ return ff_parse_pes_pts(buf);
}
static int find_next_start_code(ByteIOContext *pb, int *size_ptr,
/* at least one es available? */
while (es_map_length >= 4){
- unsigned char type = get_byte(pb);
- unsigned char es_id = get_byte(pb);
+ unsigned char type = get_byte(pb);
+ unsigned char es_id = get_byte(pb);
uint16_t es_info_length = get_be16(pb);
/* remember mapping from stream id to stream type */
m->psm_es_type[es_id] = type;
int len, size, startcode, c, flags, header_len;
int pes_ext, ext2_len, id_ext, skip;
int64_t pts, dts;
- int64_t last_sync= url_ftell(&s->pb);
+ int64_t last_sync= url_ftell(s->pb);
error_redo:
- url_fseek(&s->pb, last_sync, SEEK_SET);
+ url_fseek(s->pb, last_sync, SEEK_SET);
redo:
/* next start code (should be immediately after) */
m->header_state = 0xff;
size = MAX_SYNC_SIZE;
- startcode = find_next_start_code(&s->pb, &size, &m->header_state);
- last_sync = url_ftell(&s->pb);
- //printf("startcode=%x pos=0x%"PRIx64"\n", startcode, url_ftell(&s->pb));
- if (startcode < 0)
- return AVERROR(EIO);
+ startcode = find_next_start_code(s->pb, &size, &m->header_state);
+ last_sync = url_ftell(s->pb);
+ //printf("startcode=%x pos=0x%"PRIx64"\n", startcode, url_ftell(s->pb));
+ if (startcode < 0){
+ if(url_feof(s->pb))
+ return AVERROR_EOF;
+ //FIXME we should remember header_state
+ return AVERROR(EAGAIN);
+ }
+
if (startcode == PACK_START_CODE)
goto redo;
if (startcode == SYSTEM_HEADER_START_CODE)
goto redo;
- if (startcode == PADDING_STREAM ||
- startcode == PRIVATE_STREAM_2) {
- /* skip them */
- len = get_be16(&s->pb);
- url_fskip(&s->pb, len);
+ if (startcode == PADDING_STREAM) {
+ url_fskip(s->pb, get_be16(s->pb));
+ goto redo;
+ }
+ if (startcode == PRIVATE_STREAM_2) {
+ len = get_be16(s->pb);
+ if (!m->sofdec) {
+ while (len-- >= 6) {
+ if (get_byte(s->pb) == 'S') {
+ uint8_t buf[5];
+ get_buffer(s->pb, buf, sizeof(buf));
+ m->sofdec = !memcmp(buf, "ofdec", 5);
+ len -= sizeof(buf);
+ break;
+ }
+ }
+ m->sofdec -= !m->sofdec;
+ }
+ url_fskip(s->pb, len);
goto redo;
}
if (startcode == PROGRAM_STREAM_MAP) {
- mpegps_psm_parse(m, &s->pb);
+ mpegps_psm_parse(m, s->pb);
goto redo;
}
(startcode == 0x1bd) || (startcode == 0x1fd)))
goto redo;
if (ppos) {
- *ppos = url_ftell(&s->pb) - 4;
+ *ppos = url_ftell(s->pb) - 4;
}
- len = get_be16(&s->pb);
+ len = get_be16(s->pb);
pts =
dts = AV_NOPTS_VALUE;
/* stuffing */
for(;;) {
if (len < 1)
goto error_redo;
- c = get_byte(&s->pb);
+ c = get_byte(s->pb);
len--;
/* XXX: for mpeg1, should test only bit 7 */
if (c != 0xff)
}
if ((c & 0xc0) == 0x40) {
/* buffer scale & size */
- get_byte(&s->pb);
- c = get_byte(&s->pb);
+ get_byte(s->pb);
+ c = get_byte(s->pb);
len -= 2;
}
if ((c & 0xe0) == 0x20) {
- dts = pts = get_pts(&s->pb, c);
+ dts = pts = get_pts(s->pb, c);
len -= 4;
if (c & 0x10){
- dts = get_pts(&s->pb, -1);
+ dts = get_pts(s->pb, -1);
len -= 5;
}
} else if ((c & 0xc0) == 0x80) {
goto redo;
}
#endif
- flags = get_byte(&s->pb);
- header_len = get_byte(&s->pb);
+ flags = get_byte(s->pb);
+ header_len = get_byte(s->pb);
len -= 2;
if (header_len > len)
goto error_redo;
len -= header_len;
if (flags & 0x80) {
- dts = pts = get_pts(&s->pb, -1);
+ dts = pts = get_pts(s->pb, -1);
header_len -= 5;
if (flags & 0x40) {
- dts = get_pts(&s->pb, -1);
+ dts = get_pts(s->pb, -1);
header_len -= 5;
}
}
+ if (flags & 0x3f && header_len == 0){
+ flags &= 0xC0;
+ av_log(s, AV_LOG_WARNING, "Further flags set but no bytes left\n");
+ }
if (flags & 0x01) { /* PES extension */
- pes_ext = get_byte(&s->pb);
+ pes_ext = get_byte(s->pb);
header_len--;
- if (pes_ext & 0x40) { /* pack header - should be zero in PS */
- goto error_redo;
- }
/* Skip PES private data, program packet sequence counter and P-STD buffer */
skip = (pes_ext >> 4) & 0xb;
skip += skip & 0x9;
- url_fskip(&s->pb, skip);
+ if (pes_ext & 0x40 || skip > header_len){
+ av_log(s, AV_LOG_WARNING, "pes_ext %X is invalid\n", pes_ext);
+ pes_ext=skip=0;
+ }
+ url_fskip(s->pb, skip);
header_len -= skip;
if (pes_ext & 0x01) { /* PES extension 2 */
- ext2_len = get_byte(&s->pb);
+ ext2_len = get_byte(s->pb);
header_len--;
if ((ext2_len & 0x7f) > 0) {
- id_ext = get_byte(&s->pb);
+ id_ext = get_byte(s->pb);
if ((id_ext & 0x80) == 0)
startcode = ((startcode & 0xff) << 8) | id_ext;
header_len--;
}
if(header_len < 0)
goto error_redo;
- url_fskip(&s->pb, header_len);
+ url_fskip(s->pb, header_len);
}
else if( c!= 0xf )
goto redo;
if (startcode == PRIVATE_STREAM_1 && !m->psm_es_type[startcode & 0xff]) {
- startcode = get_byte(&s->pb);
+ startcode = get_byte(s->pb);
len--;
if (startcode >= 0x80 && startcode <= 0xcf) {
/* audio: skip header */
- get_byte(&s->pb);
- get_byte(&s->pb);
- get_byte(&s->pb);
+ get_byte(s->pb);
+ get_byte(s->pb);
+ get_byte(s->pb);
len -= 3;
if (startcode >= 0xb0 && startcode <= 0xbf) {
/* MLP/TrueHD audio has a 4-byte header */
- get_byte(&s->pb);
+ get_byte(s->pb);
len--;
}
}
if(dts != AV_NOPTS_VALUE && ppos){
int i;
for(i=0; i<s->nb_streams; i++){
- if(startcode == s->streams[i]->id) {
+ if(startcode == s->streams[i]->id &&
+ !url_is_streamed(s->pb) /* index useless on streams anyway */) {
+ ff_reduce_index(s, i);
av_add_index_entry(s->streams[i], *ppos, dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
}
}
{
MpegDemuxContext *m = s->priv_data;
AVStream *st;
- int len, startcode, i, type, codec_id = 0, es_type;
+ int len, startcode, i, es_type;
+ enum CodecID codec_id = CODEC_ID_NONE;
+ enum CodecType type;
int64_t pts, dts, dummy_pos; //dummy_pos is needed for the index building to work
+ uint8_t av_uninit(dvdaudio_substream_type);
redo:
len = mpegps_read_pes_header(s, &dummy_pos, &startcode, &pts, &dts);
if (len < 0)
return len;
+ if(startcode == 0x1bd) {
+ dvdaudio_substream_type = get_byte(s->pb);
+ url_fskip(s->pb, 3);
+ len -= 4;
+ }
+
/* now find stream */
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
}
es_type = m->psm_es_type[startcode & 0xff];
- if(es_type > 0){
+ if(es_type > 0 && es_type != STREAM_TYPE_PRIVATE_DATA){
if(es_type == STREAM_TYPE_VIDEO_MPEG1){
codec_id = CODEC_ID_MPEG2VIDEO;
type = CODEC_TYPE_VIDEO;
} else if (startcode >= 0x1e0 && startcode <= 0x1ef) {
static const unsigned char avs_seqh[4] = { 0, 0, 1, 0xb0 };
unsigned char buf[8];
- get_buffer(&s->pb, buf, 8);
- url_fseek(&s->pb, -8, SEEK_CUR);
+ get_buffer(s->pb, buf, 8);
+ url_fseek(s->pb, -8, SEEK_CUR);
if(!memcmp(buf, avs_seqh, 4) && (buf[6] != 0 || buf[7] != 1))
codec_id = CODEC_ID_CAVS;
else
- codec_id = CODEC_ID_MPEG2VIDEO;
+ codec_id = CODEC_ID_PROBE;
type = CODEC_TYPE_VIDEO;
} else if (startcode >= 0x1c0 && startcode <= 0x1df) {
type = CODEC_TYPE_AUDIO;
- codec_id = CODEC_ID_MP2;
+ codec_id = m->sofdec > 0 ? CODEC_ID_ADPCM_ADX : CODEC_ID_MP2;
} else if (startcode >= 0x80 && startcode <= 0x87) {
type = CODEC_TYPE_AUDIO;
codec_id = CODEC_ID_AC3;
- } else if ((startcode >= 0x88 && startcode <= 0x8f)
+ } else if ( ( startcode >= 0x88 && startcode <= 0x8f)
||( startcode >= 0x98 && startcode <= 0x9f)) {
/* 0x90 - 0x97 is reserved for SDDS in DVD specs */
type = CODEC_TYPE_AUDIO;
codec_id = CODEC_ID_DTS;
} else if (startcode >= 0xa0 && startcode <= 0xaf) {
type = CODEC_TYPE_AUDIO;
- codec_id = CODEC_ID_PCM_S16BE;
+ /* 16 bit form will be handled as CODEC_ID_PCM_S16BE */
+ codec_id = CODEC_ID_PCM_DVD;
} else if (startcode >= 0xb0 && startcode <= 0xbf) {
type = CODEC_TYPE_AUDIO;
- codec_id = CODEC_ID_MLP;
+ codec_id = CODEC_ID_TRUEHD;
} else if (startcode >= 0xc0 && startcode <= 0xcf) {
/* Used for both AC-3 and E-AC-3 in EVOB files */
type = CODEC_TYPE_AUDIO;
} else if (startcode >= 0xfd55 && startcode <= 0xfd5f) {
type = CODEC_TYPE_VIDEO;
codec_id = CODEC_ID_VC1;
+ } else if (startcode == 0x1bd) {
+ // check dvd audio substream type
+ type = CODEC_TYPE_AUDIO;
+ switch(dvdaudio_substream_type & 0xe0) {
+ case 0xa0: codec_id = CODEC_ID_PCM_DVD;
+ break;
+ case 0x80: if((dvdaudio_substream_type & 0xf8) == 0x88)
+ codec_id = CODEC_ID_DTS;
+ else codec_id = CODEC_ID_AC3;
+ break;
+ default: av_log(s, AV_LOG_ERROR, "Unknown 0x1bd sub-stream\n");
+ goto skip;
+ }
} else {
skip:
/* skip packet */
- url_fskip(&s->pb, len);
+ url_fskip(s->pb, len);
goto redo;
}
/* no stream found: add a new stream */
found:
if(st->discard >= AVDISCARD_ALL)
goto skip;
- if (startcode >= 0xa0 && startcode <= 0xaf) {
+ if ((startcode >= 0xa0 && startcode <= 0xaf) ||
+ (startcode == 0x1bd && ((dvdaudio_substream_type & 0xe0) == 0xa0))) {
int b1, freq;
/* for LPCM, we just skip the header and consider it is raw
audio data */
if (len <= 3)
goto skip;
- get_byte(&s->pb); /* emphasis (1), muse(1), reserved(1), frame number(5) */
- b1 = get_byte(&s->pb); /* quant (2), freq(2), reserved(1), channels(3) */
- get_byte(&s->pb); /* dynamic range control (0x80 = off) */
+ get_byte(s->pb); /* emphasis (1), muse(1), reserved(1), frame number(5) */
+ b1 = get_byte(s->pb); /* quant (2), freq(2), reserved(1), channels(3) */
+ get_byte(s->pb); /* dynamic range control (0x80 = off) */
len -= 3;
freq = (b1 >> 4) & 3;
st->codec->sample_rate = lpcm_freq_tab[freq];
st->codec->channels = 1 + (b1 & 7);
- st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * 2;
+ st->codec->bits_per_coded_sample = 16 + ((b1 >> 6) & 3) * 4;
+ st->codec->bit_rate = st->codec->channels *
+ st->codec->sample_rate *
+ st->codec->bits_per_coded_sample;
+ if (st->codec->bits_per_coded_sample == 16)
+ st->codec->codec_id = CODEC_ID_PCM_S16BE;
+ else if (st->codec->bits_per_coded_sample == 28)
+ return AVERROR(EINVAL);
}
av_new_packet(pkt, len);
- get_buffer(&s->pb, pkt->data, pkt->size);
+ get_buffer(s->pb, pkt->data, pkt->size);
pkt->pts = pts;
pkt->dts = dts;
+ pkt->pos = dummy_pos;
pkt->stream_index = st->index;
#if 0
av_log(s, AV_LOG_DEBUG, "%d: pts=%0.3f dts=%0.3f size=%d\n",
return 0;
}
-static int mpegps_read_close(AVFormatContext *s)
-{
- return 0;
-}
-
static int64_t mpegps_read_dts(AVFormatContext *s, int stream_index,
int64_t *ppos, int64_t pos_limit)
{
#ifdef DEBUG_SEEK
printf("read_dts: pos=0x%"PRIx64" next=%d -> ", pos, find_next);
#endif
- url_fseek(&s->pb, pos, SEEK_SET);
+ if (url_fseek(s->pb, pos, SEEK_SET) < 0)
+ return AV_NOPTS_VALUE;
+
for(;;) {
len = mpegps_read_pes_header(s, &pos, &startcode, &pts, &dts);
if (len < 0) {
dts != AV_NOPTS_VALUE) {
break;
}
- url_fskip(&s->pb, len);
+ url_fskip(s->pb, len);
}
#ifdef DEBUG_SEEK
printf("pos=0x%"PRIx64" dts=0x%"PRIx64" %0.3f\n", pos, dts, dts / 90000.0);
AVInputFormat mpegps_demuxer = {
"mpeg",
- "MPEG PS format",
+ NULL_IF_CONFIG_SMALL("MPEG-PS format"),
sizeof(MpegDemuxContext),
mpegps_probe,
mpegps_read_header,
mpegps_read_packet,
- mpegps_read_close,
+ NULL,
NULL, //mpegps_read_seek,
mpegps_read_dts,
- .flags = AVFMT_SHOW_IDS,
+ .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
};
projects / ffmpeg / blobdiff