* MPEG1/2 demuxer
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
+#include "internal.h"
#include "mpeg.h"
-//#define DEBUG_SEEK
-
#undef NDEBUG
#include <assert.h>
return pes1||pes2;
}
+static int check_pack_header(const uint8_t *buf) {
+ return (buf[1] & 0xC0) == 0x40 || (buf[1] & 0xF0) == 0x20;
+}
+
static int mpegps_probe(AVProbeData *p)
{
uint32_t code= -1;
if ((code & 0xffffff00) == 0x100) {
int len= p->buf[i+1] << 8 | p->buf[i+2];
int pes= check_pes(p->buf+i, p->buf+p->buf_size);
+ int pack = check_pack_header(p->buf+i);
if(code == SYSTEM_HEADER_START_CODE) sys++;
- else if(code == PACK_START_CODE) pspack++;
+ else if(code == PACK_START_CODE && pack) pspack++;
else if((code & 0xf0) == VIDEO_ID && pes) vid++;
// skip pes payload to avoid start code emulation for private
// and audio streams
m->sofdec = -1;
do {
- v = get_byte(s->pb);
+ v = avio_r8(s->pb);
m->header_state = m->header_state << 8 | v;
m->sofdec++;
} while (v == sofdec[i] && i++ < 6);
return 0;
}
-static int64_t get_pts(ByteIOContext *pb, int c)
+static int64_t get_pts(AVIOContext *pb, int c)
{
uint8_t buf[5];
- buf[0] = c<0 ? get_byte(pb) : c;
- get_buffer(pb, buf+1, 4);
+ buf[0] = c<0 ? avio_r8(pb) : c;
+ avio_read(pb, buf+1, 4);
return ff_parse_pes_pts(buf);
}
-static int find_next_start_code(ByteIOContext *pb, int *size_ptr,
+static int find_next_start_code(AVIOContext *pb, int *size_ptr,
int32_t *header_state)
{
unsigned int state, v;
state = *header_state;
n = *size_ptr;
while (n > 0) {
- if (url_feof(pb))
+ if (pb->eof_reached)
break;
- v = get_byte(pb);
+ v = avio_r8(pb);
n--;
if (state == 0x000001) {
state = ((state << 8) | v) & 0xffffff;
#if 0 /* unused, remove? */
/* XXX: optimize */
-static int find_prev_start_code(ByteIOContext *pb, int *size_ptr)
+static int find_prev_start_code(AVIOContext *pb, int *size_ptr)
{
int64_t pos, pos_start;
int max_size, start_code;
max_size = *size_ptr;
- pos_start = url_ftell(pb);
+ pos_start = avio_tell(pb);
/* in order to go faster, we fill the buffer */
pos = pos_start - 16386;
if (pos < 0)
pos = 0;
- url_fseek(pb, pos, SEEK_SET);
- get_byte(pb);
+ avio_seek(pb, pos, SEEK_SET);
+ avio_r8(pb);
pos = pos_start;
for(;;) {
start_code = -1;
goto the_end;
}
- url_fseek(pb, pos, SEEK_SET);
- start_code = get_be32(pb);
+ avio_seek(pb, pos, SEEK_SET);
+ start_code = avio_rb32(pb);
if ((start_code & 0xffffff00) == 0x100)
break;
}
*
* @return number of bytes occupied by PSM in the bitstream
*/
-static long mpegps_psm_parse(MpegDemuxContext *m, ByteIOContext *pb)
+static long mpegps_psm_parse(MpegDemuxContext *m, AVIOContext *pb)
{
int psm_length, ps_info_length, es_map_length;
- psm_length = get_be16(pb);
- get_byte(pb);
- get_byte(pb);
- ps_info_length = get_be16(pb);
+ psm_length = avio_rb16(pb);
+ avio_r8(pb);
+ avio_r8(pb);
+ ps_info_length = avio_rb16(pb);
/* skip program_stream_info */
- url_fskip(pb, ps_info_length);
- es_map_length = get_be16(pb);
+ avio_skip(pb, ps_info_length);
+ es_map_length = avio_rb16(pb);
/* at least one es available? */
while (es_map_length >= 4){
- unsigned char type = get_byte(pb);
- unsigned char es_id = get_byte(pb);
- uint16_t es_info_length = get_be16(pb);
+ unsigned char type = avio_r8(pb);
+ unsigned char es_id = avio_r8(pb);
+ uint16_t es_info_length = avio_rb16(pb);
/* remember mapping from stream id to stream type */
m->psm_es_type[es_id] = type;
/* skip program_stream_info */
- url_fskip(pb, es_info_length);
+ avio_skip(pb, es_info_length);
es_map_length -= 4 + es_info_length;
}
- get_be32(pb); /* crc32 */
+ avio_rb32(pb); /* crc32 */
return 2 + psm_length;
}
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= avio_tell(s->pb);
error_redo:
- url_fseek(s->pb, last_sync, SEEK_SET);
+ avio_seek(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));
+ last_sync = avio_tell(s->pb);
+ //printf("startcode=%x pos=0x%"PRIx64"\n", startcode, avio_tell(s->pb));
if (startcode < 0){
- if(url_feof(s->pb))
+ if(s->pb->eof_reached)
return AVERROR_EOF;
//FIXME we should remember header_state
return AVERROR(EAGAIN);
if (startcode == SYSTEM_HEADER_START_CODE)
goto redo;
if (startcode == PADDING_STREAM) {
- url_fskip(s->pb, get_be16(s->pb));
+ avio_skip(s->pb, avio_rb16(s->pb));
goto redo;
}
if (startcode == PRIVATE_STREAM_2) {
- len = get_be16(s->pb);
+ len = avio_rb16(s->pb);
if (!m->sofdec) {
while (len-- >= 6) {
- if (get_byte(s->pb) == 'S') {
+ if (avio_r8(s->pb) == 'S') {
uint8_t buf[5];
- get_buffer(s->pb, buf, sizeof(buf));
+ avio_read(s->pb, buf, sizeof(buf));
m->sofdec = !memcmp(buf, "ofdec", 5);
len -= sizeof(buf);
break;
}
m->sofdec -= !m->sofdec;
}
- url_fskip(s->pb, len);
+ avio_skip(s->pb, len);
goto redo;
}
if (startcode == PROGRAM_STREAM_MAP) {
(startcode == 0x1bd) || (startcode == 0x1fd)))
goto redo;
if (ppos) {
- *ppos = url_ftell(s->pb) - 4;
+ *ppos = avio_tell(s->pb) - 4;
}
- len = get_be16(s->pb);
+ len = avio_rb16(s->pb);
pts =
dts = AV_NOPTS_VALUE;
/* stuffing */
for(;;) {
if (len < 1)
goto error_redo;
- c = get_byte(s->pb);
+ c = avio_r8(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);
+ avio_r8(s->pb);
+ c = avio_r8(s->pb);
len -= 2;
}
if ((c & 0xe0) == 0x20) {
goto redo;
}
#endif
- flags = get_byte(s->pb);
- header_len = get_byte(s->pb);
+ flags = avio_r8(s->pb);
+ header_len = avio_r8(s->pb);
len -= 2;
if (header_len > len)
goto error_redo;
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 = avio_r8(s->pb);
header_len--;
/* Skip PES private data, program packet sequence counter and P-STD buffer */
skip = (pes_ext >> 4) & 0xb;
av_log(s, AV_LOG_WARNING, "pes_ext %X is invalid\n", pes_ext);
pes_ext=skip=0;
}
- url_fskip(s->pb, skip);
+ avio_skip(s->pb, skip);
header_len -= skip;
if (pes_ext & 0x01) { /* PES extension 2 */
- ext2_len = get_byte(s->pb);
+ ext2_len = avio_r8(s->pb);
header_len--;
if ((ext2_len & 0x7f) > 0) {
- id_ext = get_byte(s->pb);
+ id_ext = avio_r8(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);
+ avio_skip(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 = avio_r8(s->pb);
len--;
if (startcode >= 0x80 && startcode <= 0xcf) {
/* audio: skip header */
- get_byte(s->pb);
- get_byte(s->pb);
- get_byte(s->pb);
+ avio_r8(s->pb);
+ avio_r8(s->pb);
+ avio_r8(s->pb);
len -= 3;
if (startcode >= 0xb0 && startcode <= 0xbf) {
/* MLP/TrueHD audio has a 4-byte header */
- get_byte(s->pb);
+ avio_r8(s->pb);
len--;
}
}
int i;
for(i=0; i<s->nb_streams; i++){
if(startcode == s->streams[i]->id &&
- !url_is_streamed(s->pb) /* index useless on streams anyway */) {
+ s->pb->seekable /* 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, es_type;
+ int len, startcode, i, es_type, ret;
enum CodecID codec_id = CODEC_ID_NONE;
enum AVMediaType type;
int64_t pts, dts, dummy_pos; //dummy_pos is needed for the index building to work
return len;
if(startcode == 0x1bd) {
- dvdaudio_substream_type = get_byte(s->pb);
- url_fskip(s->pb, 3);
+ dvdaudio_substream_type = avio_r8(s->pb);
+ avio_skip(s->pb, 3);
len -= 4;
}
} 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);
+ avio_read(s->pb, buf, 8);
+ avio_seek(s->pb, -8, SEEK_CUR);
if(!memcmp(buf, avs_seqh, 4) && (buf[6] != 0 || buf[7] != 1))
codec_id = CODEC_ID_CAVS;
else
} else {
skip:
/* skip packet */
- url_fskip(s->pb, len);
+ avio_skip(s->pb, len);
goto redo;
}
/* no stream found: add a new stream */
- st = av_new_stream(s, startcode);
+ st = avformat_new_stream(s, NULL);
if (!st)
goto skip;
+ st->id = startcode;
st->codec->codec_type = type;
st->codec->codec_id = codec_id;
if (codec_id != CODEC_ID_PCM_S16BE)
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) */
+ avio_r8(s->pb); /* emphasis (1), muse(1), reserved(1), frame number(5) */
+ b1 = avio_r8(s->pb); /* quant (2), freq(2), reserved(1), channels(3) */
+ avio_r8(s->pb); /* dynamic range control (0x80 = off) */
len -= 3;
freq = (b1 >> 4) & 3;
st->codec->sample_rate = lpcm_freq_tab[freq];
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);
+ ret = av_get_packet(s->pb, pkt, len);
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",
- pkt->stream_index, pkt->pts / 90000.0, pkt->dts / 90000.0, pkt->size);
-#endif
+ av_dlog(s, "%d: pts=%0.3f dts=%0.3f size=%d\n",
+ pkt->stream_index, pkt->pts / 90000.0, pkt->dts / 90000.0,
+ pkt->size);
- return 0;
+ return (ret < 0) ? ret : 0;
}
static int64_t mpegps_read_dts(AVFormatContext *s, int stream_index,
int64_t pos, pts, dts;
pos = *ppos;
-#ifdef DEBUG_SEEK
- printf("read_dts: pos=0x%"PRIx64" next=%d -> ", pos, find_next);
-#endif
- if (url_fseek(s->pb, pos, SEEK_SET) < 0)
+ if (avio_seek(s->pb, pos, SEEK_SET) < 0)
return AV_NOPTS_VALUE;
for(;;) {
len = mpegps_read_pes_header(s, &pos, &startcode, &pts, &dts);
if (len < 0) {
-#ifdef DEBUG_SEEK
- printf("none (ret=%d)\n", len);
-#endif
+ av_dlog(s, "none (ret=%d)\n", len);
return AV_NOPTS_VALUE;
}
if (startcode == s->streams[stream_index]->id &&
dts != AV_NOPTS_VALUE) {
break;
}
- url_fskip(s->pb, len);
+ avio_skip(s->pb, len);
}
-#ifdef DEBUG_SEEK
- printf("pos=0x%"PRIx64" dts=0x%"PRIx64" %0.3f\n", pos, dts, dts / 90000.0);
-#endif
+ av_dlog(s, "pos=0x%"PRIx64" dts=0x%"PRIx64" %0.3f\n",
+ pos, dts, dts / 90000.0);
*ppos = pos;
return dts;
}
AVInputFormat ff_mpegps_demuxer = {
- "mpeg",
- NULL_IF_CONFIG_SMALL("MPEG-PS format"),
- sizeof(MpegDemuxContext),
- mpegps_probe,
- mpegps_read_header,
- mpegps_read_packet,
- NULL,
- NULL, //mpegps_read_seek,
- mpegps_read_dts,
+ .name = "mpeg",
+ .long_name = NULL_IF_CONFIG_SMALL("MPEG-PS format"),
+ .priv_data_size = sizeof(MpegDemuxContext),
+ .read_probe = mpegps_probe,
+ .read_header = mpegps_read_header,
+ .read_packet = mpegps_read_packet,
+ .read_timestamp = mpegps_read_dts,
.flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
};
projects / ffmpeg / blobdiff