/*
* 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
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) {
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++;
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;
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);
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;
+ 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(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
redo:
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;
} 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;
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);
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) {
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,
};