Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 1 | /* |
Baptiste Coudurier | 2abe5a0 | 2007-06-21 09:39:29 | [diff] [blame] | 2 | * MPEG1/2 demuxer |
Diego Biurrun | 406792e | 2009-01-19 15:46:40 | [diff] [blame] | 3 | * Copyright (c) 2000, 2001, 2002 Fabrice Bellard |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 4 | * |
Diego Biurrun | b78e719 | 2006-10-07 15:30:46 | [diff] [blame] | 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
Fabrice Bellard | 19720f1 | 2002-05-25 22:34:32 | [diff] [blame] | 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
Diego Biurrun | b78e719 | 2006-10-07 15:30:46 | [diff] [blame] | 10 | * version 2.1 of the License, or (at your option) any later version. |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 11 | * |
Diego Biurrun | b78e719 | 2006-10-07 15:30:46 | [diff] [blame] | 12 | * FFmpeg is distributed in the hope that it will be useful, |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
Fabrice Bellard | 19720f1 | 2002-05-25 22:34:32 | [diff] [blame] | 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 16 | * |
Fabrice Bellard | 19720f1 | 2002-05-25 22:34:32 | [diff] [blame] | 17 | * You should have received a copy of the GNU Lesser General Public |
Diego Biurrun | b78e719 | 2006-10-07 15:30:46 | [diff] [blame] | 18 | * License along with FFmpeg; if not, write to the Free Software |
Diego Biurrun | 5509bff | 2006-01-12 22:43:26 | [diff] [blame] | 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 20 | */ |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 21 | |
Baptiste Coudurier | 2abe5a0 | 2007-06-21 09:39:29 | [diff] [blame] | 22 | #include "avformat.h" |
Anton Khirnov | f819467 | 2011-02-06 14:38:55 | [diff] [blame] | 23 | #include "internal.h" |
Baptiste Coudurier | 2abe5a0 | 2007-06-21 09:39:29 | [diff] [blame] | 24 | #include "mpeg.h" |
| 25 | |
Michael Niedermayer | b754978 | 2004-01-13 22:02:49 | [diff] [blame] | 26 | #undef NDEBUG |
| 27 | #include <assert.h> |
| 28 | |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 29 | /*********************************************/ |
| 30 | /* demux code */ |
| 31 | |
| 32 | #define MAX_SYNC_SIZE 100000 |
| 33 | |
Michael Niedermayer | c6dcd0d | 2007-11-03 13:48:30 | [diff] [blame] | 34 | static int check_pes(uint8_t *p, uint8_t *end){ |
| 35 | int pes1; |
| 36 | int pes2= (p[3] & 0xC0) == 0x80 |
| 37 | && (p[4] & 0xC0) != 0x40 |
| 38 | &&((p[4] & 0xC0) == 0x00 || (p[4]&0xC0)>>2 == (p[6]&0xF0)); |
| 39 | |
| 40 | for(p+=3; p<end && *p == 0xFF; p++); |
| 41 | if((*p&0xC0) == 0x40) p+=2; |
| 42 | if((*p&0xF0) == 0x20){ |
| 43 | pes1= p[0]&p[2]&p[4]&1; |
Michael Niedermayer | c6dcd0d | 2007-11-03 13:48:30 | [diff] [blame] | 44 | }else if((*p&0xF0) == 0x30){ |
| 45 | pes1= p[0]&p[2]&p[4]&p[5]&p[7]&p[9]&1; |
Michael Niedermayer | c6dcd0d | 2007-11-03 13:48:30 | [diff] [blame] | 46 | }else |
| 47 | pes1 = *p == 0x0F; |
| 48 | |
| 49 | return pes1||pes2; |
| 50 | } |
| 51 | |
Alex Converse | fe21f78 | 2011-09-28 22:43:24 | [diff] [blame] | 52 | static int check_pack_header(const uint8_t *buf) { |
| 53 | return (buf[1] & 0xC0) == 0x40 || (buf[1] & 0xF0) == 0x20; |
| 54 | } |
| 55 | |
Fabrice Bellard | db7f1f9 | 2002-05-20 16:29:40 | [diff] [blame] | 56 | static int mpegps_probe(AVProbeData *p) |
| 57 | { |
Michael Niedermayer | 9870a7b | 2006-02-08 17:35:44 | [diff] [blame] | 58 | uint32_t code= -1; |
Michael Niedermayer | 7e1720d | 2007-12-03 09:37:06 | [diff] [blame] | 59 | int sys=0, pspack=0, priv1=0, vid=0, audio=0, invalid=0; |
Michael Niedermayer | 95f97de | 2004-10-01 16:00:00 | [diff] [blame] | 60 | int i; |
Michael Niedermayer | a1c69e0 | 2006-08-19 08:39:00 | [diff] [blame] | 61 | int score=0; |
Fabrice Bellard | db7f1f9 | 2002-05-20 16:29:40 | [diff] [blame] | 62 | |
Michael Niedermayer | 9870a7b | 2006-02-08 17:35:44 | [diff] [blame] | 63 | for(i=0; i<p->buf_size; i++){ |
| 64 | code = (code<<8) + p->buf[i]; |
Isaac Richards | ec23a47 | 2003-07-10 09:04:04 | [diff] [blame] | 65 | if ((code & 0xffffff00) == 0x100) { |
Janne Grunau | 612dc02 | 2010-05-24 12:32:13 | [diff] [blame] | 66 | int len= p->buf[i+1] << 8 | p->buf[i+2]; |
Michael Niedermayer | 0c904db | 2007-11-03 14:57:26 | [diff] [blame] | 67 | int pes= check_pes(p->buf+i, p->buf+p->buf_size); |
Alex Converse | fe21f78 | 2011-09-28 22:43:24 | [diff] [blame] | 68 | int pack = check_pack_header(p->buf+i); |
Michael Niedermayer | c6dcd0d | 2007-11-03 13:48:30 | [diff] [blame] | 69 | |
Måns Rullgård | 25c533a | 2006-06-29 19:03:53 | [diff] [blame] | 70 | if(code == SYSTEM_HEADER_START_CODE) sys++; |
Alex Converse | fe21f78 | 2011-09-28 22:43:24 | [diff] [blame] | 71 | else if(code == PACK_START_CODE && pack) pspack++; |
Michael Niedermayer | 274335e | 2008-08-26 01:29:43 | [diff] [blame] | 72 | else if((code & 0xf0) == VIDEO_ID && pes) vid++; |
Janne Grunau | 612dc02 | 2010-05-24 12:32:13 | [diff] [blame] | 73 | // skip pes payload to avoid start code emulation for private |
| 74 | // and audio streams |
| 75 | else if((code & 0xe0) == AUDIO_ID && pes) {audio++; i+=len;} |
| 76 | else if(code == PRIVATE_STREAM_1 && pes) {priv1++; i+=len;} |
Michael Niedermayer | 2f9815d | 2011-03-09 00:07:35 | [diff] [blame] | 77 | else if(code == 0x1fd && pes) vid++; //VC1 |
Michael Niedermayer | 7e1720d | 2007-12-03 09:37:06 | [diff] [blame] | 78 | |
| 79 | else if((code & 0xf0) == VIDEO_ID && !pes) invalid++; |
| 80 | else if((code & 0xe0) == AUDIO_ID && !pes) invalid++; |
Janne Grunau | 612dc02 | 2010-05-24 12:32:13 | [diff] [blame] | 81 | else if(code == PRIVATE_STREAM_1 && !pes) invalid++; |
Isaac Richards | ec23a47 | 2003-07-10 09:04:04 | [diff] [blame] | 82 | } |
Fabrice Bellard | db7f1f9 | 2002-05-20 16:29:40 | [diff] [blame] | 83 | } |
Michael Niedermayer | a1c69e0 | 2006-08-19 08:39:00 | [diff] [blame] | 84 | |
Michael Niedermayer | 2f9815d | 2011-03-09 00:07:35 | [diff] [blame] | 85 | if(vid+audio > invalid+1) /* invalid VDR files nd short PES streams */ |
Michael Niedermayer | a1c69e0 | 2006-08-19 08:39:00 | [diff] [blame] | 86 | score= AVPROBE_SCORE_MAX/4; |
| 87 | |
Michael Niedermayer | 6de5b62 | 2009-12-08 12:24:41 | [diff] [blame] | 88 | //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d %d len:%d\n", sys, priv1, pspack,vid, audio, invalid, p->buf_size); |
Michael Niedermayer | 7e1720d | 2007-12-03 09:37:06 | [diff] [blame] | 89 | if(sys>invalid && sys*9 <= pspack*10) |
Michael Niedermayer | 00ddf62 | 2012-07-31 01:59:29 | [diff] [blame] | 90 | return (audio > 12 || vid > 3 || pspack > 2) ? AVPROBE_SCORE_MAX/2+2 : AVPROBE_SCORE_MAX/4; // +1 for .mpg |
Michael Niedermayer | 55f6524 | 2009-12-08 12:19:30 | [diff] [blame] | 91 | if(pspack > invalid && (priv1+vid+audio)*10 >= pspack*9) |
Michael Niedermayer | c4674a4 | 2009-09-15 12:20:03 | [diff] [blame] | 92 | return pspack > 2 ? AVPROBE_SCORE_MAX/2+2 : AVPROBE_SCORE_MAX/4; // +1 for .mpg |
| 93 | if((!!vid ^ !!audio) && (audio > 4 || vid > 1) && !sys && !pspack && p->buf_size>2048 && vid + audio > invalid) /* PES stream */ |
Michael Niedermayer | 31d8261 | 2012-08-03 00:45:07 | [diff] [blame] | 94 | return (audio > 12 || vid > 3 + 2*invalid) ? AVPROBE_SCORE_MAX/2+2 : AVPROBE_SCORE_MAX/4; |
Michael Niedermayer | a1c69e0 | 2006-08-19 08:39:00 | [diff] [blame] | 95 | |
| 96 | //02-Penguin.flac has sys:0 priv1:0 pspack:0 vid:0 audio:1 |
Reimar Döffinger | 3489e15 | 2009-09-15 10:01:25 | [diff] [blame] | 97 | //mp3_misidentified_2.mp3 has sys:0 priv1:0 pspack:0 vid:0 audio:6 |
Michael Niedermayer | 31d8261 | 2012-08-03 00:45:07 | [diff] [blame] | 98 | //Have\ Yourself\ a\ Merry\ Little\ Christmas.mp3 0 0 0 5 0 1 len:21618 |
Michael Niedermayer | a1c69e0 | 2006-08-19 08:39:00 | [diff] [blame] | 99 | return score; |
Fabrice Bellard | db7f1f9 | 2002-05-20 16:29:40 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 103 | typedef struct MpegDemuxContext { |
Måns Rullgård | 191e8ca | 2006-09-27 19:47:39 | [diff] [blame] | 104 | int32_t header_state; |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 105 | unsigned char psm_es_type[256]; |
Aurelien Jacobs | 8cd4ac3 | 2007-11-07 23:56:00 | [diff] [blame] | 106 | int sofdec; |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 107 | } MpegDemuxContext; |
| 108 | |
Anton Khirnov | 6e9651d | 2012-01-12 12:20:36 | [diff] [blame] | 109 | static int mpegps_read_header(AVFormatContext *s) |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 110 | { |
| 111 | MpegDemuxContext *m = s->priv_data; |
Måns Rullgård | 2c18784 | 2007-11-08 21:27:37 | [diff] [blame] | 112 | const char *sofdec = "Sofdec"; |
| 113 | int v, i = 0; |
Arne de Bruijn | b2f230e | 2011-09-17 12:59:00 | [diff] [blame] | 114 | int64_t last_pos = avio_tell(s->pb); |
Aurelien Jacobs | 8cd4ac3 | 2007-11-07 23:56:00 | [diff] [blame] | 115 | |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 116 | m->header_state = 0xff; |
| 117 | s->ctx_flags |= AVFMTCTX_NOHEADER; |
| 118 | |
Måns Rullgård | 2c18784 | 2007-11-08 21:27:37 | [diff] [blame] | 119 | m->sofdec = -1; |
| 120 | do { |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 121 | v = avio_r8(s->pb); |
Måns Rullgård | 2c18784 | 2007-11-08 21:27:37 | [diff] [blame] | 122 | m->sofdec++; |
| 123 | } while (v == sofdec[i] && i++ < 6); |
Aurelien Jacobs | 8cd4ac3 | 2007-11-07 23:56:00 | [diff] [blame] | 124 | |
[email protected] | 711e69a | 2009-10-20 15:27:05 | [diff] [blame] | 125 | m->sofdec = (m->sofdec == 6) ? 1 : 0; |
| 126 | |
Arne de Bruijn | b2f230e | 2011-09-17 12:59:00 | [diff] [blame] | 127 | if (!m->sofdec) |
| 128 | avio_seek(s->pb, last_pos, SEEK_SET); |
| 129 | |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 130 | /* no need to do more */ |
| 131 | return 0; |
| 132 | } |
| 133 | |
Anton Khirnov | 471fe57 | 2011-02-20 10:04:12 | [diff] [blame] | 134 | static int64_t get_pts(AVIOContext *pb, int c) |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 135 | { |
Ivo van Poorten | 66e9e30 | 2008-01-07 23:32:57 | [diff] [blame] | 136 | uint8_t buf[5]; |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 137 | |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 138 | buf[0] = c<0 ? avio_r8(pb) : c; |
| 139 | avio_read(pb, buf+1, 4); |
Ivo van Poorten | 66e9e30 | 2008-01-07 23:32:57 | [diff] [blame] | 140 | |
| 141 | return ff_parse_pes_pts(buf); |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 142 | } |
| 143 | |
Anton Khirnov | 471fe57 | 2011-02-20 10:04:12 | [diff] [blame] | 144 | static int find_next_start_code(AVIOContext *pb, int *size_ptr, |
Måns Rullgård | 191e8ca | 2006-09-27 19:47:39 | [diff] [blame] | 145 | int32_t *header_state) |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 146 | { |
| 147 | unsigned int state, v; |
| 148 | int val, n; |
| 149 | |
| 150 | state = *header_state; |
| 151 | n = *size_ptr; |
| 152 | while (n > 0) { |
| 153 | if (url_feof(pb)) |
| 154 | break; |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 155 | v = avio_r8(pb); |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 156 | n--; |
| 157 | if (state == 0x000001) { |
| 158 | state = ((state << 8) | v) & 0xffffff; |
| 159 | val = state; |
| 160 | goto found; |
| 161 | } |
| 162 | state = ((state << 8) | v) & 0xffffff; |
| 163 | } |
| 164 | val = -1; |
| 165 | found: |
| 166 | *header_state = state; |
| 167 | *size_ptr = n; |
| 168 | return val; |
| 169 | } |
| 170 | |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 171 | /** |
Måns Rullgård | 49bd8e4 | 2010-06-30 15:38:06 | [diff] [blame] | 172 | * Extract stream types from a program stream map |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 173 | * According to ISO/IEC 13818-1 ('MPEG-2 Systems') table 2-35 |
Diego Biurrun | 115329f | 2005-12-17 18:14:38 | [diff] [blame] | 174 | * |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 175 | * @return number of bytes occupied by PSM in the bitstream |
| 176 | */ |
Anton Khirnov | 471fe57 | 2011-02-20 10:04:12 | [diff] [blame] | 177 | static long mpegps_psm_parse(MpegDemuxContext *m, AVIOContext *pb) |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 178 | { |
| 179 | int psm_length, ps_info_length, es_map_length; |
| 180 | |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 181 | psm_length = avio_rb16(pb); |
| 182 | avio_r8(pb); |
| 183 | avio_r8(pb); |
| 184 | ps_info_length = avio_rb16(pb); |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 185 | |
| 186 | /* skip program_stream_info */ |
Anton Khirnov | 45a8a02 | 2011-03-15 08:14:38 | [diff] [blame] | 187 | avio_skip(pb, ps_info_length); |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 188 | es_map_length = avio_rb16(pb); |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 189 | |
| 190 | /* at least one es available? */ |
| 191 | while (es_map_length >= 4){ |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 192 | unsigned char type = avio_r8(pb); |
| 193 | unsigned char es_id = avio_r8(pb); |
| 194 | uint16_t es_info_length = avio_rb16(pb); |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 195 | /* remember mapping from stream id to stream type */ |
| 196 | m->psm_es_type[es_id] = type; |
| 197 | /* skip program_stream_info */ |
Anton Khirnov | 45a8a02 | 2011-03-15 08:14:38 | [diff] [blame] | 198 | avio_skip(pb, es_info_length); |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 199 | es_map_length -= 4 + es_info_length; |
| 200 | } |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 201 | avio_rb32(pb); /* crc32 */ |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 202 | return 2 + psm_length; |
| 203 | } |
| 204 | |
Diego Biurrun | 115329f | 2005-12-17 18:14:38 | [diff] [blame] | 205 | /* read the next PES header. Return its position in ppos |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 206 | (if not NULL), and its start code, pts and dts. |
| 207 | */ |
| 208 | static int mpegps_read_pes_header(AVFormatContext *s, |
Diego Biurrun | 115329f | 2005-12-17 18:14:38 | [diff] [blame] | 209 | int64_t *ppos, int *pstart_code, |
Michael Niedermayer | 8d14a25 | 2004-04-12 16:50:03 | [diff] [blame] | 210 | int64_t *ppts, int64_t *pdts) |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 211 | { |
| 212 | MpegDemuxContext *m = s->priv_data; |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 213 | int len, size, startcode, c, flags, header_len; |
Michael Niedermayer | aad512b | 2007-02-06 19:14:16 | [diff] [blame] | 214 | int pes_ext, ext2_len, id_ext, skip; |
Michael Niedermayer | e56cfad | 2007-01-17 10:19:10 | [diff] [blame] | 215 | int64_t pts, dts; |
Anton Khirnov | 384c9c2 | 2011-03-03 19:11:45 | [diff] [blame] | 216 | int64_t last_sync= avio_tell(s->pb); |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 217 | |
Michael Niedermayer | e56cfad | 2007-01-17 10:19:10 | [diff] [blame] | 218 | error_redo: |
Anton Khirnov | f59d8ff | 2011-02-28 13:57:54 | [diff] [blame] | 219 | avio_seek(s->pb, last_sync, SEEK_SET); |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 220 | redo: |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 221 | /* next start code (should be immediately after) */ |
| 222 | m->header_state = 0xff; |
| 223 | size = MAX_SYNC_SIZE; |
Björn Axelsson | 899681c | 2007-11-21 07:41:00 | [diff] [blame] | 224 | startcode = find_next_start_code(s->pb, &size, &m->header_state); |
Anton Khirnov | 384c9c2 | 2011-03-03 19:11:45 | [diff] [blame] | 225 | last_sync = avio_tell(s->pb); |
| 226 | //printf("startcode=%x pos=0x%"PRIx64"\n", startcode, avio_tell(s->pb)); |
Michael Niedermayer | 0332324 | 2010-02-10 14:25:57 | [diff] [blame] | 227 | if (startcode < 0){ |
| 228 | if(url_feof(s->pb)) |
| 229 | return AVERROR_EOF; |
| 230 | //FIXME we should remember header_state |
| 231 | return AVERROR(EAGAIN); |
| 232 | } |
| 233 | |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 234 | if (startcode == PACK_START_CODE) |
| 235 | goto redo; |
| 236 | if (startcode == SYSTEM_HEADER_START_CODE) |
| 237 | goto redo; |
Måns Rullgård | 2c18784 | 2007-11-08 21:27:37 | [diff] [blame] | 238 | if (startcode == PADDING_STREAM) { |
Anton Khirnov | 45a8a02 | 2011-03-15 08:14:38 | [diff] [blame] | 239 | avio_skip(s->pb, avio_rb16(s->pb)); |
Måns Rullgård | 2c18784 | 2007-11-08 21:27:37 | [diff] [blame] | 240 | goto redo; |
| 241 | } |
| 242 | if (startcode == PRIVATE_STREAM_2) { |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 243 | len = avio_rb16(s->pb); |
Måns Rullgård | 2c18784 | 2007-11-08 21:27:37 | [diff] [blame] | 244 | if (!m->sofdec) { |
| 245 | while (len-- >= 6) { |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 246 | if (avio_r8(s->pb) == 'S') { |
Måns Rullgård | 2c18784 | 2007-11-08 21:27:37 | [diff] [blame] | 247 | uint8_t buf[5]; |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 248 | avio_read(s->pb, buf, sizeof(buf)); |
Måns Rullgård | 2c18784 | 2007-11-08 21:27:37 | [diff] [blame] | 249 | m->sofdec = !memcmp(buf, "ofdec", 5); |
| 250 | len -= sizeof(buf); |
| 251 | break; |
| 252 | } |
| 253 | } |
| 254 | m->sofdec -= !m->sofdec; |
| 255 | } |
Anton Khirnov | 45a8a02 | 2011-03-15 08:14:38 | [diff] [blame] | 256 | avio_skip(s->pb, len); |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 257 | goto redo; |
| 258 | } |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 259 | if (startcode == PROGRAM_STREAM_MAP) { |
Björn Axelsson | 899681c | 2007-11-21 07:41:00 | [diff] [blame] | 260 | mpegps_psm_parse(m, s->pb); |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 261 | goto redo; |
| 262 | } |
Diego Biurrun | 115329f | 2005-12-17 18:14:38 | [diff] [blame] | 263 | |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 264 | /* find matching stream */ |
| 265 | if (!((startcode >= 0x1c0 && startcode <= 0x1df) || |
| 266 | (startcode >= 0x1e0 && startcode <= 0x1ef) || |
Michael Niedermayer | aad512b | 2007-02-06 19:14:16 | [diff] [blame] | 267 | (startcode == 0x1bd) || (startcode == 0x1fd))) |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 268 | goto redo; |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 269 | if (ppos) { |
Anton Khirnov | 384c9c2 | 2011-03-03 19:11:45 | [diff] [blame] | 270 | *ppos = avio_tell(s->pb) - 4; |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 271 | } |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 272 | len = avio_rb16(s->pb); |
Michael Niedermayer | 75a9fbb | 2007-01-17 10:45:59 | [diff] [blame] | 273 | pts = |
Fabrice Bellard | b2cac18 | 2002-10-21 15:57:21 | [diff] [blame] | 274 | dts = AV_NOPTS_VALUE; |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 275 | /* stuffing */ |
| 276 | for(;;) { |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 277 | if (len < 1) |
Michael Niedermayer | e56cfad | 2007-01-17 10:19:10 | [diff] [blame] | 278 | goto error_redo; |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 279 | c = avio_r8(s->pb); |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 280 | len--; |
| 281 | /* XXX: for mpeg1, should test only bit 7 */ |
Diego Biurrun | 115329f | 2005-12-17 18:14:38 | [diff] [blame] | 282 | if (c != 0xff) |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 283 | break; |
| 284 | } |
| 285 | if ((c & 0xc0) == 0x40) { |
| 286 | /* buffer scale & size */ |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 287 | avio_r8(s->pb); |
| 288 | c = avio_r8(s->pb); |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 289 | len -= 2; |
| 290 | } |
Michael Niedermayer | b90ba24 | 2007-01-17 10:55:01 | [diff] [blame] | 291 | if ((c & 0xe0) == 0x20) { |
Björn Axelsson | 899681c | 2007-11-21 07:41:00 | [diff] [blame] | 292 | dts = pts = get_pts(s->pb, c); |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 293 | len -= 4; |
Michael Niedermayer | b90ba24 | 2007-01-17 10:55:01 | [diff] [blame] | 294 | if (c & 0x10){ |
Björn Axelsson | 899681c | 2007-11-21 07:41:00 | [diff] [blame] | 295 | dts = get_pts(s->pb, -1); |
Michael Niedermayer | b90ba24 | 2007-01-17 10:55:01 | [diff] [blame] | 296 | len -= 5; |
| 297 | } |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 298 | } else if ((c & 0xc0) == 0x80) { |
| 299 | /* mpeg 2 PES */ |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 300 | flags = avio_r8(s->pb); |
| 301 | header_len = avio_r8(s->pb); |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 302 | len -= 2; |
| 303 | if (header_len > len) |
Michael Niedermayer | e56cfad | 2007-01-17 10:19:10 | [diff] [blame] | 304 | goto error_redo; |
Michael Niedermayer | 8003620 | 2007-01-17 12:06:31 | [diff] [blame] | 305 | len -= header_len; |
Michael Niedermayer | b90ba24 | 2007-01-17 10:55:01 | [diff] [blame] | 306 | if (flags & 0x80) { |
Björn Axelsson | 899681c | 2007-11-21 07:41:00 | [diff] [blame] | 307 | dts = pts = get_pts(s->pb, -1); |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 308 | header_len -= 5; |
Michael Niedermayer | b90ba24 | 2007-01-17 10:55:01 | [diff] [blame] | 309 | if (flags & 0x40) { |
Björn Axelsson | 899681c | 2007-11-21 07:41:00 | [diff] [blame] | 310 | dts = get_pts(s->pb, -1); |
Michael Niedermayer | b90ba24 | 2007-01-17 10:55:01 | [diff] [blame] | 311 | header_len -= 5; |
Michael Niedermayer | b90ba24 | 2007-01-17 10:55:01 | [diff] [blame] | 312 | } |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 313 | } |
Michael Niedermayer | 675b839 | 2008-03-04 01:31:15 | [diff] [blame] | 314 | if (flags & 0x3f && header_len == 0){ |
| 315 | flags &= 0xC0; |
| 316 | av_log(s, AV_LOG_WARNING, "Further flags set but no bytes left\n"); |
| 317 | } |
Michael Niedermayer | aad512b | 2007-02-06 19:14:16 | [diff] [blame] | 318 | if (flags & 0x01) { /* PES extension */ |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 319 | pes_ext = avio_r8(s->pb); |
Michael Niedermayer | aad512b | 2007-02-06 19:14:16 | [diff] [blame] | 320 | header_len--; |
Michael Niedermayer | aad512b | 2007-02-06 19:14:16 | [diff] [blame] | 321 | /* Skip PES private data, program packet sequence counter and P-STD buffer */ |
| 322 | skip = (pes_ext >> 4) & 0xb; |
| 323 | skip += skip & 0x9; |
Michael Niedermayer | b22d0c0 | 2008-04-29 00:12:49 | [diff] [blame] | 324 | if (pes_ext & 0x40 || skip > header_len){ |
| 325 | av_log(s, AV_LOG_WARNING, "pes_ext %X is invalid\n", pes_ext); |
| 326 | pes_ext=skip=0; |
| 327 | } |
Anton Khirnov | 45a8a02 | 2011-03-15 08:14:38 | [diff] [blame] | 328 | avio_skip(s->pb, skip); |
Michael Niedermayer | aad512b | 2007-02-06 19:14:16 | [diff] [blame] | 329 | header_len -= skip; |
| 330 | |
| 331 | if (pes_ext & 0x01) { /* PES extension 2 */ |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 332 | ext2_len = avio_r8(s->pb); |
Michael Niedermayer | aad512b | 2007-02-06 19:14:16 | [diff] [blame] | 333 | header_len--; |
| 334 | if ((ext2_len & 0x7f) > 0) { |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 335 | id_ext = avio_r8(s->pb); |
Michael Niedermayer | aad512b | 2007-02-06 19:14:16 | [diff] [blame] | 336 | if ((id_ext & 0x80) == 0) |
| 337 | startcode = ((startcode & 0xff) << 8) | id_ext; |
| 338 | header_len--; |
| 339 | } |
| 340 | } |
| 341 | } |
Michael Niedermayer | 8003620 | 2007-01-17 12:06:31 | [diff] [blame] | 342 | if(header_len < 0) |
| 343 | goto error_redo; |
Anton Khirnov | 45a8a02 | 2011-03-15 08:14:38 | [diff] [blame] | 344 | avio_skip(s->pb, header_len); |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 345 | } |
Dmitry Borisov | df70de1 | 2004-04-23 21:02:01 | [diff] [blame] | 346 | else if( c!= 0xf ) |
| 347 | goto redo; |
| 348 | |
Michael Niedermayer | afa6afc | 2012-07-31 17:20:00 | [diff] [blame] | 349 | if (startcode == PRIVATE_STREAM_1) { |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 350 | startcode = avio_r8(s->pb); |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 351 | len--; |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 352 | } |
Michael Niedermayer | 7e4709b | 2007-01-17 10:44:57 | [diff] [blame] | 353 | if(len<0) |
| 354 | goto error_redo; |
Michael Niedermayer | b754978 | 2004-01-13 22:02:49 | [diff] [blame] | 355 | if(dts != AV_NOPTS_VALUE && ppos){ |
| 356 | int i; |
| 357 | for(i=0; i<s->nb_streams; i++){ |
Michel Bardiaux | 6ba90c2 | 2008-01-14 16:11:08 | [diff] [blame] | 358 | if(startcode == s->streams[i]->id && |
Anton Khirnov | 8978fed | 2011-03-05 20:06:46 | [diff] [blame] | 359 | s->pb->seekable /* index useless on streams anyway */) { |
Paul Kelly | 3dea63b | 2008-01-13 13:33:37 | [diff] [blame] | 360 | ff_reduce_index(s, i); |
Michael Niedermayer | 30a43f2 | 2006-03-01 11:29:55 | [diff] [blame] | 361 | av_add_index_entry(s->streams[i], *ppos, dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */); |
Michael Niedermayer | b754978 | 2004-01-13 22:02:49 | [diff] [blame] | 362 | } |
| 363 | } |
| 364 | } |
Diego Biurrun | 115329f | 2005-12-17 18:14:38 | [diff] [blame] | 365 | |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 366 | *pstart_code = startcode; |
| 367 | *ppts = pts; |
| 368 | *pdts = dts; |
| 369 | return len; |
| 370 | } |
| 371 | |
| 372 | static int mpegps_read_packet(AVFormatContext *s, |
| 373 | AVPacket *pkt) |
| 374 | { |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 375 | MpegDemuxContext *m = s->priv_data; |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 376 | AVStream *st; |
Alex Converse | 9fba8eb | 2011-09-23 23:28:23 | [diff] [blame] | 377 | int len, startcode, i, es_type, ret; |
Michael Niedermayer | 759901f | 2012-07-31 18:54:33 | [diff] [blame] | 378 | int lpcm_header_len; |
Michael Niedermayer | 5b56ad0 | 2011-03-04 00:12:17 | [diff] [blame] | 379 | int request_probe= 0; |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 380 | enum AVCodecID codec_id = AV_CODEC_ID_NONE; |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 381 | enum AVMediaType type; |
Michael Niedermayer | b754978 | 2004-01-13 22:02:49 | [diff] [blame] | 382 | int64_t pts, dts, dummy_pos; //dummy_pos is needed for the index building to work |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 383 | |
| 384 | redo: |
Michael Niedermayer | 8d14a25 | 2004-04-12 16:50:03 | [diff] [blame] | 385 | len = mpegps_read_pes_header(s, &dummy_pos, &startcode, &pts, &dts); |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 386 | if (len < 0) |
| 387 | return len; |
Diego Biurrun | 115329f | 2005-12-17 18:14:38 | [diff] [blame] | 388 | |
Michael Niedermayer | ce7cf60 | 2012-07-31 17:43:20 | [diff] [blame] | 389 | if (startcode >= 0x80 && startcode <= 0xcf) { |
| 390 | if(len < 4) |
| 391 | goto skip; |
| 392 | |
| 393 | /* audio: skip header */ |
| 394 | avio_r8(s->pb); |
Michael Niedermayer | 759901f | 2012-07-31 18:54:33 | [diff] [blame] | 395 | lpcm_header_len = avio_rb16(s->pb); |
Michael Niedermayer | ce7cf60 | 2012-07-31 17:43:20 | [diff] [blame] | 396 | len -= 3; |
| 397 | if (startcode >= 0xb0 && startcode <= 0xbf) { |
| 398 | /* MLP/TrueHD audio has a 4-byte header */ |
| 399 | avio_r8(s->pb); |
| 400 | len--; |
| 401 | } |
| 402 | } |
| 403 | |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 404 | /* now find stream */ |
| 405 | for(i=0;i<s->nb_streams;i++) { |
| 406 | st = s->streams[i]; |
| 407 | if (st->id == startcode) |
| 408 | goto found; |
| 409 | } |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 410 | |
| 411 | es_type = m->psm_es_type[startcode & 0xff]; |
Benoit Fouet | 80e58c6 | 2009-02-11 11:09:36 | [diff] [blame] | 412 | if(es_type > 0 && es_type != STREAM_TYPE_PRIVATE_DATA){ |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 413 | if(es_type == STREAM_TYPE_VIDEO_MPEG1){ |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 414 | codec_id = AV_CODEC_ID_MPEG2VIDEO; |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 415 | type = AVMEDIA_TYPE_VIDEO; |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 416 | } else if(es_type == STREAM_TYPE_VIDEO_MPEG2){ |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 417 | codec_id = AV_CODEC_ID_MPEG2VIDEO; |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 418 | type = AVMEDIA_TYPE_VIDEO; |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 419 | } else if(es_type == STREAM_TYPE_AUDIO_MPEG1 || |
| 420 | es_type == STREAM_TYPE_AUDIO_MPEG2){ |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 421 | codec_id = AV_CODEC_ID_MP3; |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 422 | type = AVMEDIA_TYPE_AUDIO; |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 423 | } else if(es_type == STREAM_TYPE_AUDIO_AAC){ |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 424 | codec_id = AV_CODEC_ID_AAC; |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 425 | type = AVMEDIA_TYPE_AUDIO; |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 426 | } else if(es_type == STREAM_TYPE_VIDEO_MPEG4){ |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 427 | codec_id = AV_CODEC_ID_MPEG4; |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 428 | type = AVMEDIA_TYPE_VIDEO; |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 429 | } else if(es_type == STREAM_TYPE_VIDEO_H264){ |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 430 | codec_id = AV_CODEC_ID_H264; |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 431 | type = AVMEDIA_TYPE_VIDEO; |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 432 | } else if(es_type == STREAM_TYPE_AUDIO_AC3){ |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 433 | codec_id = AV_CODEC_ID_AC3; |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 434 | type = AVMEDIA_TYPE_AUDIO; |
Måns Rullgård | e3d1cd8 | 2005-03-28 17:33:21 | [diff] [blame] | 435 | } else { |
| 436 | goto skip; |
| 437 | } |
| 438 | } else if (startcode >= 0x1e0 && startcode <= 0x1ef) { |
Måns Rullgård | 83d0731 | 2006-07-03 21:40:01 | [diff] [blame] | 439 | static const unsigned char avs_seqh[4] = { 0, 0, 1, 0xb0 }; |
| 440 | unsigned char buf[8]; |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 441 | avio_read(s->pb, buf, 8); |
Anton Khirnov | f59d8ff | 2011-02-28 13:57:54 | [diff] [blame] | 442 | avio_seek(s->pb, -8, SEEK_CUR); |
Måns Rullgård | 83d0731 | 2006-07-03 21:40:01 | [diff] [blame] | 443 | if(!memcmp(buf, avs_seqh, 4) && (buf[6] != 0 || buf[7] != 1)) |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 444 | codec_id = AV_CODEC_ID_CAVS; |
Måns Rullgård | 83d0731 | 2006-07-03 21:40:01 | [diff] [blame] | 445 | else |
Michael Niedermayer | 5b56ad0 | 2011-03-04 00:12:17 | [diff] [blame] | 446 | request_probe= 1; |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 447 | type = AVMEDIA_TYPE_VIDEO; |
Fabrice Bellard | db7f1f9 | 2002-05-20 16:29:40 | [diff] [blame] | 448 | } else if (startcode >= 0x1c0 && startcode <= 0x1df) { |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 449 | type = AVMEDIA_TYPE_AUDIO; |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 450 | codec_id = m->sofdec > 0 ? AV_CODEC_ID_ADPCM_ADX : AV_CODEC_ID_MP2; |
Joakim Plate | 3f2bf07 | 2005-05-20 13:10:09 | [diff] [blame] | 451 | } else if (startcode >= 0x80 && startcode <= 0x87) { |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 452 | type = AVMEDIA_TYPE_AUDIO; |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 453 | codec_id = AV_CODEC_ID_AC3; |
Michael Niedermayer | 274335e | 2008-08-26 01:29:43 | [diff] [blame] | 454 | } else if ( ( startcode >= 0x88 && startcode <= 0x8f) |
Michael Niedermayer | aad512b | 2007-02-06 19:14:16 | [diff] [blame] | 455 | ||( startcode >= 0x98 && startcode <= 0x9f)) { |
| 456 | /* 0x90 - 0x97 is reserved for SDDS in DVD specs */ |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 457 | type = AVMEDIA_TYPE_AUDIO; |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 458 | codec_id = AV_CODEC_ID_DTS; |
Michael Niedermayer | aad512b | 2007-02-06 19:14:16 | [diff] [blame] | 459 | } else if (startcode >= 0xa0 && startcode <= 0xaf) { |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 460 | type = AVMEDIA_TYPE_AUDIO; |
Michael Niedermayer | 759901f | 2012-07-31 18:54:33 | [diff] [blame] | 461 | if(lpcm_header_len == 6) { |
Michael Niedermayer | 7a72695 | 2012-08-07 20:45:46 | [diff] [blame^] | 462 | codec_id = AV_CODEC_ID_MLP; |
Michael Niedermayer | 759901f | 2012-07-31 18:54:33 | [diff] [blame] | 463 | } else { |
Michael Niedermayer | 7a72695 | 2012-08-07 20:45:46 | [diff] [blame^] | 464 | /* 16 bit form will be handled as AV_CODEC_ID_PCM_S16BE */ |
| 465 | codec_id = AV_CODEC_ID_PCM_DVD; |
Michael Niedermayer | 759901f | 2012-07-31 18:54:33 | [diff] [blame] | 466 | } |
Michael Niedermayer | aad512b | 2007-02-06 19:14:16 | [diff] [blame] | 467 | } else if (startcode >= 0xb0 && startcode <= 0xbf) { |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 468 | type = AVMEDIA_TYPE_AUDIO; |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 469 | codec_id = AV_CODEC_ID_TRUEHD; |
Michael Niedermayer | aad512b | 2007-02-06 19:14:16 | [diff] [blame] | 470 | } else if (startcode >= 0xc0 && startcode <= 0xcf) { |
| 471 | /* Used for both AC-3 and E-AC-3 in EVOB files */ |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 472 | type = AVMEDIA_TYPE_AUDIO; |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 473 | codec_id = AV_CODEC_ID_AC3; |
Fabrice Bellard | a9c3213 | 2005-06-03 14:01:49 | [diff] [blame] | 474 | } else if (startcode >= 0x20 && startcode <= 0x3f) { |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 475 | type = AVMEDIA_TYPE_SUBTITLE; |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 476 | codec_id = AV_CODEC_ID_DVD_SUBTITLE; |
Michael Niedermayer | aad512b | 2007-02-06 19:14:16 | [diff] [blame] | 477 | } else if (startcode >= 0xfd55 && startcode <= 0xfd5f) { |
Stefano Sabatini | 72415b2 | 2010-03-30 23:30:55 | [diff] [blame] | 478 | type = AVMEDIA_TYPE_VIDEO; |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 479 | codec_id = AV_CODEC_ID_VC1; |
Fabrice Bellard | db7f1f9 | 2002-05-20 16:29:40 | [diff] [blame] | 480 | } else { |
| 481 | skip: |
| 482 | /* skip packet */ |
Anton Khirnov | 45a8a02 | 2011-03-15 08:14:38 | [diff] [blame] | 483 | avio_skip(s->pb, len); |
Fabrice Bellard | db7f1f9 | 2002-05-20 16:29:40 | [diff] [blame] | 484 | goto redo; |
| 485 | } |
Fabrice Bellard | 1e5c667 | 2002-10-04 15:46:59 | [diff] [blame] | 486 | /* no stream found: add a new stream */ |
Anton Khirnov | 84ad31f | 2011-06-18 09:43:24 | [diff] [blame] | 487 | st = avformat_new_stream(s, NULL); |
Diego Biurrun | 115329f | 2005-12-17 18:14:38 | [diff] [blame] | 488 | if (!st) |
Fabrice Bellard | 1e5c667 | 2002-10-04 15:46:59 | [diff] [blame] | 489 | goto skip; |
Anton Khirnov | 84ad31f | 2011-06-18 09:43:24 | [diff] [blame] | 490 | st->id = startcode; |
Michael Niedermayer | 01f4895 | 2005-07-17 22:24:36 | [diff] [blame] | 491 | st->codec->codec_type = type; |
| 492 | st->codec->codec_id = codec_id; |
Michael Niedermayer | 5b56ad0 | 2011-03-04 00:12:17 | [diff] [blame] | 493 | st->request_probe = request_probe; |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 494 | if (codec_id != AV_CODEC_ID_PCM_S16BE) |
Aurelien Jacobs | 57004ff | 2007-04-15 13:51:57 | [diff] [blame] | 495 | st->need_parsing = AVSTREAM_PARSE_FULL; |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 496 | found: |
Michael Niedermayer | f3356e9 | 2005-03-17 01:25:01 | [diff] [blame] | 497 | if(st->discard >= AVDISCARD_ALL) |
Michael Niedermayer | b9866eb | 2005-01-22 13:36:02 | [diff] [blame] | 498 | goto skip; |
Michael Niedermayer | afa6afc | 2012-07-31 17:20:00 | [diff] [blame] | 499 | if (startcode >= 0xa0 && startcode <= 0xaf) { |
Michael Niedermayer | 759901f | 2012-07-31 18:54:33 | [diff] [blame] | 500 | if (lpcm_header_len == 6) { |
| 501 | if (len < 6) |
| 502 | goto skip; |
| 503 | avio_skip(s->pb, 6); |
| 504 | len -=6; |
| 505 | } else { |
Fabrice Bellard | 9ec05e3 | 2003-01-31 17:04:46 | [diff] [blame] | 506 | int b1, freq; |
Fabrice Bellard | 9ec05e3 | 2003-01-31 17:04:46 | [diff] [blame] | 507 | |
| 508 | /* for LPCM, we just skip the header and consider it is raw |
| 509 | audio data */ |
| 510 | if (len <= 3) |
| 511 | goto skip; |
Anton Khirnov | e63a362 | 2011-02-21 15:43:01 | [diff] [blame] | 512 | avio_r8(s->pb); /* emphasis (1), muse(1), reserved(1), frame number(5) */ |
| 513 | b1 = avio_r8(s->pb); /* quant (2), freq(2), reserved(1), channels(3) */ |
| 514 | avio_r8(s->pb); /* dynamic range control (0x80 = off) */ |
Fabrice Bellard | 9ec05e3 | 2003-01-31 17:04:46 | [diff] [blame] | 515 | len -= 3; |
| 516 | freq = (b1 >> 4) & 3; |
Michael Niedermayer | 01f4895 | 2005-07-17 22:24:36 | [diff] [blame] | 517 | st->codec->sample_rate = lpcm_freq_tab[freq]; |
| 518 | st->codec->channels = 1 + (b1 & 7); |
Luca Abeni | dd1c8f3 | 2008-09-08 14:24:59 | [diff] [blame] | 519 | st->codec->bits_per_coded_sample = 16 + ((b1 >> 6) & 3) * 4; |
Lars Täuber | 4860abb | 2008-05-21 02:26:42 | [diff] [blame] | 520 | st->codec->bit_rate = st->codec->channels * |
| 521 | st->codec->sample_rate * |
Luca Abeni | dd1c8f3 | 2008-09-08 14:24:59 | [diff] [blame] | 522 | st->codec->bits_per_coded_sample; |
| 523 | if (st->codec->bits_per_coded_sample == 16) |
Anton Khirnov | 36ef536 | 2012-08-05 09:11:04 | [diff] [blame] | 524 | st->codec->codec_id = AV_CODEC_ID_PCM_S16BE; |
Luca Abeni | dd1c8f3 | 2008-09-08 14:24:59 | [diff] [blame] | 525 | else if (st->codec->bits_per_coded_sample == 28) |
Lars Täuber | 4860abb | 2008-05-21 02:26:42 | [diff] [blame] | 526 | return AVERROR(EINVAL); |
Michael Niedermayer | 759901f | 2012-07-31 18:54:33 | [diff] [blame] | 527 | } |
Fabrice Bellard | 9ec05e3 | 2003-01-31 17:04:46 | [diff] [blame] | 528 | } |
Alex Converse | 98ef887 | 2011-10-08 00:02:36 | [diff] [blame] | 529 | ret = av_get_packet(s->pb, pkt, len); |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 530 | pkt->pts = pts; |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 531 | pkt->dts = dts; |
Michael Niedermayer | c45ebd5 | 2010-02-02 16:47:51 | [diff] [blame] | 532 | pkt->pos = dummy_pos; |
Fabrice Bellard | db7f1f9 | 2002-05-20 16:29:40 | [diff] [blame] | 533 | pkt->stream_index = st->index; |
Diego Biurrun | b751f61 | 2011-06-02 18:40:09 | [diff] [blame] | 534 | av_dlog(s, "%d: pts=%0.3f dts=%0.3f size=%d\n", |
Diego Biurrun | 045dd4b | 2011-04-29 15:27:01 | [diff] [blame] | 535 | pkt->stream_index, pkt->pts / 90000.0, pkt->dts / 90000.0, |
| 536 | pkt->size); |
Mike Melanson | 0bd586c | 2004-06-19 03:59:34 | [diff] [blame] | 537 | |
Alex Converse | 9fba8eb | 2011-09-23 23:28:23 | [diff] [blame] | 538 | return (ret < 0) ? ret : 0; |
Fabrice Bellard | de6d9b6 | 2001-07-22 14:18:56 | [diff] [blame] | 539 | } |
| 540 | |
Diego Biurrun | 115329f | 2005-12-17 18:14:38 | [diff] [blame] | 541 | static int64_t mpegps_read_dts(AVFormatContext *s, int stream_index, |
Michael Niedermayer | 8d14a25 | 2004-04-12 16:50:03 | [diff] [blame] | 542 | int64_t *ppos, int64_t pos_limit) |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 543 | { |
| 544 | int len, startcode; |
| 545 | int64_t pos, pts, dts; |
| 546 | |
| 547 | pos = *ppos; |
Anton Khirnov | f59d8ff | 2011-02-28 13:57:54 | [diff] [blame] | 548 | if (avio_seek(s->pb, pos, SEEK_SET) < 0) |
Joakim Plate | 5faf168 | 2008-05-29 09:50:17 | [diff] [blame] | 549 | return AV_NOPTS_VALUE; |
| 550 | |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 551 | for(;;) { |
Michael Niedermayer | 8d14a25 | 2004-04-12 16:50:03 | [diff] [blame] | 552 | len = mpegps_read_pes_header(s, &pos, &startcode, &pts, &dts); |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 553 | if (len < 0) { |
Diego Biurrun | 919d7a3 | 2011-06-07 11:18:12 | [diff] [blame] | 554 | av_dlog(s, "none (ret=%d)\n", len); |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 555 | return AV_NOPTS_VALUE; |
| 556 | } |
Diego Biurrun | 115329f | 2005-12-17 18:14:38 | [diff] [blame] | 557 | if (startcode == s->streams[stream_index]->id && |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 558 | dts != AV_NOPTS_VALUE) { |
| 559 | break; |
| 560 | } |
Anton Khirnov | 45a8a02 | 2011-03-15 08:14:38 | [diff] [blame] | 561 | avio_skip(s->pb, len); |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 562 | } |
Diego Biurrun | 919d7a3 | 2011-06-07 11:18:12 | [diff] [blame] | 563 | av_dlog(s, "pos=0x%"PRIx64" dts=0x%"PRIx64" %0.3f\n", |
| 564 | pos, dts, dts / 90000.0); |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 565 | *ppos = pos; |
Michael Niedermayer | cdd5034 | 2004-05-23 16:26:12 | [diff] [blame] | 566 | return dts; |
Fabrice Bellard | 27f388a | 2003-11-10 18:47:52 | [diff] [blame] | 567 | } |
| 568 | |
Diego Elio Pettenò | 66355be | 2011-01-25 22:03:28 | [diff] [blame] | 569 | AVInputFormat ff_mpegps_demuxer = { |
Anton Khirnov | dfc2c4d | 2011-07-16 20:18:12 | [diff] [blame] | 570 | .name = "mpeg", |
Diego Biurrun | 0177b7d | 2012-07-24 01:23:48 | [diff] [blame] | 571 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-PS (MPEG-2 Program Stream)"), |
Anton Khirnov | dfc2c4d | 2011-07-16 20:18:12 | [diff] [blame] | 572 | .priv_data_size = sizeof(MpegDemuxContext), |
| 573 | .read_probe = mpegps_probe, |
| 574 | .read_header = mpegps_read_header, |
| 575 | .read_packet = mpegps_read_packet, |
Anton Khirnov | dfc2c4d | 2011-07-16 20:18:12 | [diff] [blame] | 576 | .read_timestamp = mpegps_read_dts, |
Martin Storsjö | 20234a4 | 2012-04-06 14:50:48 | [diff] [blame] | 577 | .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT, |
Fabrice Bellard | db7f1f9 | 2002-05-20 16:29:40 | [diff] [blame] | 578 | }; |