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FFmpeg/libavformat/raw.c

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  1. /*

  2.  * RAW muxer and demuxer

  3.  * Copyright (c) 2001 Fabrice Bellard

  4.  * Copyright (c) 2005 Alex Beregszaszi

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

  8.  * FFmpeg is free software; you can redistribute it and/or

  9.  * modify it under the terms of the GNU Lesser General Public

  10.  * License as published by the Free Software Foundation; either

  11.  * version 2.1 of the License, or (at your option) any later version.

  12.  *

  13.  * FFmpeg is distributed in the hope that it will be useful,

  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  16.  * Lesser General Public License for more details.

  17.  *

  18.  * You should have received a copy of the GNU Lesser General Public

  19.  * License along with FFmpeg; if not, write to the Free Software

  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  21.  */

  22. 

  23. #include "libavutil/crc.h"

  24. #include "libavcodec/ac3_parser.h"

  25. #include "libavcodec/get_bits.h"

  26. #include "libavcodec/bytestream.h"

  27. #include "avformat.h"

  28. #include "raw.h"

  29. #include "id3v2.h"

  30. #include "id3v1.h"

  31. 

  32. /* simple formats */

  33. 

  34. #if CONFIG_ROQ_MUXER

  35. static int roq_write_header(struct AVFormatContext *s)

  36. {

  37.     static const uint8_t header[] = {

  38.         0x84, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, 0x1E, 0x00

  39.     };

  40. 

  41.     put_buffer(s->pb, header, 8);

  42.     put_flush_packet(s->pb);

  43. 

  44.     return 0;

  45. }

  46. #endif

  47. 

  48. #if CONFIG_NULL_MUXER

  49. static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)

  50. {

  51.     return 0;

  52. }

  53. #endif

  54. 

  55. #if CONFIG_MUXERS

  56. static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)

  57. {

  58.     put_buffer(s->pb, pkt->data, pkt->size);

  59.     put_flush_packet(s->pb);

  60.     return 0;

  61. }

  62. #endif

  63. 

  64. #if CONFIG_DEMUXERS

  65. /* raw input */

  66. static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)

  67. {

  68.     AVStream *st;

  69.     enum CodecID id;

  70. 

  71.     st = av_new_stream(s, 0);

  72.     if (!st)

  73.         return AVERROR(ENOMEM);

  74. 

  75.         id = s->iformat->value;

  76.         if (id == CODEC_ID_RAWVIDEO) {

  77.             st->codec->codec_type = CODEC_TYPE_VIDEO;

  78.         } else {

  79.             st->codec->codec_type = CODEC_TYPE_AUDIO;

  80.         }

  81.         st->codec->codec_id = id;

  82. 

  83.         switch(st->codec->codec_type) {

  84.         case CODEC_TYPE_AUDIO:

  85.             st->codec->sample_rate = ap->sample_rate;

  86.             if(ap->channels) st->codec->channels = ap->channels;

  87.             else             st->codec->channels = 1;

  88.             st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);

  89.             assert(st->codec->bits_per_coded_sample > 0);

  90.             st->codec->block_align = st->codec->bits_per_coded_sample*st->codec->channels/8;

  91.             av_set_pts_info(st, 64, 1, st->codec->sample_rate);

  92.             break;

  93.         case CODEC_TYPE_VIDEO:

  94.             if(ap->time_base.num)

  95.                 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);

  96.             else

  97.                 av_set_pts_info(st, 64, 1, 25);

  98.             st->codec->width = ap->width;

  99.             st->codec->height = ap->height;

  100.             st->codec->pix_fmt = ap->pix_fmt;

  101.             if(st->codec->pix_fmt == PIX_FMT_NONE)

  102.                 st->codec->pix_fmt= PIX_FMT_YUV420P;

  103.             break;

  104.         default:

  105.             return -1;

  106.         }

  107.     return 0;

  108. }

  109. 

  110. #define RAW_PACKET_SIZE 1024

  111. #define RAW_SAMPLES     1024

  112. 

  113. static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)

  114. {

  115.     int ret, size, bps;

  116.     //    AVStream *st = s->streams[0];

  117. 

  118.     size= RAW_SAMPLES*s->streams[0]->codec->block_align;

  119. 

  120.     ret= av_get_packet(s->pb, pkt, size);

  121. 

  122.     pkt->stream_index = 0;

  123.     if (ret < 0)

  124.         return ret;

  125. 

  126.     bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);

  127.     assert(bps); // if false there IS a bug elsewhere (NOT in this function)

  128.     pkt->dts=

  129.     pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);

  130. 

  131.     return ret;

  132. }

  133. 

  134. int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)

  135. {

  136.     int ret, size;

  137. 

  138.     size = RAW_PACKET_SIZE;

  139. 

  140.     if (av_new_packet(pkt, size) < 0)

  141.         return AVERROR(ENOMEM);

  142. 

  143.     pkt->pos= url_ftell(s->pb);

  144.     pkt->stream_index = 0;

  145.     ret = get_partial_buffer(s->pb, pkt->data, size);

  146.     if (ret < 0) {

  147.         av_free_packet(pkt);

  148.         return ret;

  149.     }

  150.     pkt->size = ret;

  151.     return ret;

  152. }

  153. #endif

  154. 

  155. #if CONFIG_RAWVIDEO_DEMUXER

  156. static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)

  157. {

  158.     int packet_size, ret, width, height;

  159.     AVStream *st = s->streams[0];

  160. 

  161.     width = st->codec->width;

  162.     height = st->codec->height;

  163. 

  164.     packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);

  165.     if (packet_size < 0)

  166.         return -1;

  167. 

  168.     ret= av_get_packet(s->pb, pkt, packet_size);

  169.     pkt->pts=

  170.     pkt->dts= pkt->pos / packet_size;

  171. 

  172.     pkt->stream_index = 0;

  173.     if (ret < 0)

  174.         return ret;

  175.     return 0;

  176. }

  177. #endif

  178. 

  179. #if CONFIG_INGENIENT_DEMUXER

  180. // http://www.artificis.hu/files/texts/ingenient.txt

  181. static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)

  182. {

  183.     int ret, size, w, h, unk1, unk2;

  184. 

  185.     if (get_le32(s->pb) != MKTAG('M', 'J', 'P', 'G'))

  186.         return AVERROR(EIO); // FIXME

  187. 

  188.     size = get_le32(s->pb);

  189. 

  190.     w = get_le16(s->pb);

  191.     h = get_le16(s->pb);

  192. 

  193.     url_fskip(s->pb, 8); // zero + size (padded?)

  194.     url_fskip(s->pb, 2);

  195.     unk1 = get_le16(s->pb);

  196.     unk2 = get_le16(s->pb);

  197.     url_fskip(s->pb, 22); // ASCII timestamp

  198. 

  199.     av_log(s, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",

  200.         size, w, h, unk1, unk2);

  201. 

  202.     if (av_new_packet(pkt, size) < 0)

  203.         return AVERROR(ENOMEM);

  204. 

  205.     pkt->pos = url_ftell(s->pb);

  206.     pkt->stream_index = 0;

  207.     ret = get_buffer(s->pb, pkt->data, size);

  208.     if (ret < 0) {

  209.         av_free_packet(pkt);

  210.         return ret;

  211.     }

  212.     pkt->size = ret;

  213.     return ret;

  214. }

  215. #endif

  216. 

  217. #if CONFIG_DEMUXERS

  218. int pcm_read_seek(AVFormatContext *s,

  219.                   int stream_index, int64_t timestamp, int flags)

  220. {

  221.     AVStream *st;

  222.     int block_align, byte_rate;

  223.     int64_t pos, ret;

  224. 

  225.     st = s->streams[0];

  226. 

  227.     block_align = st->codec->block_align ? st->codec->block_align :

  228.         (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;

  229.     byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 :

  230.         block_align * st->codec->sample_rate;

  231. 

  232.     if (block_align <= 0 || byte_rate <= 0)

  233.         return -1;

  234.     if (timestamp < 0) timestamp = 0;

  235. 

  236.     /* compute the position by aligning it to block_align */

  237.     pos = av_rescale_rnd(timestamp * byte_rate,

  238.                          st->time_base.num,

  239.                          st->time_base.den * (int64_t)block_align,

  240.                          (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);

  241.     pos *= block_align;

  242. 

  243.     /* recompute exact position */

  244.     st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);

  245.     if ((ret = url_fseek(s->pb, pos + s->data_offset, SEEK_SET)) < 0)

  246.         return ret;

  247.     return 0;

  248. }

  249. 

  250. static int audio_read_header(AVFormatContext *s,

  251.                              AVFormatParameters *ap)

  252. {

  253.     AVStream *st = av_new_stream(s, 0);

  254.     if (!st)

  255.         return AVERROR(ENOMEM);

  256.     st->codec->codec_type = CODEC_TYPE_AUDIO;

  257.     st->codec->codec_id = s->iformat->value;

  258.     st->need_parsing = AVSTREAM_PARSE_FULL;

  259.     /* the parameters will be extracted from the compressed bitstream */

  260. 

  261.     return 0;

  262. }

  263. 

  264. /* MPEG-1/H.263 input */

  265. static int video_read_header(AVFormatContext *s,

  266.                              AVFormatParameters *ap)

  267. {

  268.     AVStream *st;

  269. 

  270.     st = av_new_stream(s, 0);

  271.     if (!st)

  272.         return AVERROR(ENOMEM);

  273. 

  274.     st->codec->codec_type = CODEC_TYPE_VIDEO;

  275.     st->codec->codec_id = s->iformat->value;

  276.     st->need_parsing = AVSTREAM_PARSE_FULL;

  277. 

  278.     /* for MJPEG, specify frame rate */

  279.     /* for MPEG-4 specify it, too (most MPEG-4 streams do not have the fixed_vop_rate set ...)*/

  280.     if (ap->time_base.num) {

  281.         st->codec->time_base= ap->time_base;

  282.     } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||

  283.                 st->codec->codec_id == CODEC_ID_MPEG4 ||

  284.                 st->codec->codec_id == CODEC_ID_DIRAC ||

  285.                 st->codec->codec_id == CODEC_ID_H264) {

  286.         st->codec->time_base= (AVRational){1,25};

  287.     }

  288.     av_set_pts_info(st, 64, 1, 1200000);

  289. 

  290.     return 0;

  291. }

  292. #endif

  293. 

  294. #if CONFIG_MPEGVIDEO_DEMUXER

  295. #define SEQ_START_CODE          0x000001b3

  296. #define GOP_START_CODE          0x000001b8

  297. #define PICTURE_START_CODE      0x00000100

  298. #define SLICE_START_CODE        0x00000101

  299. #define PACK_START_CODE         0x000001ba

  300. #define VIDEO_ID                0x000001e0

  301. #define AUDIO_ID                0x000001c0

  302. 

  303. static int mpegvideo_probe(AVProbeData *p)

  304. {

  305.     uint32_t code= -1;

  306.     int pic=0, seq=0, slice=0, pspack=0, pes=0;

  307.     int i;

  308. 

  309.     for(i=0; i<p->buf_size; i++){

  310.         code = (code<<8) + p->buf[i];

  311.         if ((code & 0xffffff00) == 0x100) {

  312.             switch(code){

  313.             case     SEQ_START_CODE:   seq++; break;

  314.             case PICTURE_START_CODE:   pic++; break;

  315.             case   SLICE_START_CODE: slice++; break;

  316.             case    PACK_START_CODE: pspack++; break;

  317.             }

  318.             if     ((code & 0x1f0) == VIDEO_ID)   pes++;

  319.             else if((code & 0x1e0) == AUDIO_ID)   pes++;

  320.         }

  321.     }

  322.     if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)

  323.         return pic>1 ? AVPROBE_SCORE_MAX/2+1 : AVPROBE_SCORE_MAX/4; // +1 for .mpg

  324.     return 0;

  325. }

  326. #endif

  327. 

  328. #if CONFIG_CAVSVIDEO_DEMUXER

  329. #define CAVS_SEQ_START_CODE       0x000001b0

  330. #define CAVS_PIC_I_START_CODE     0x000001b3

  331. #define CAVS_UNDEF_START_CODE     0x000001b4

  332. #define CAVS_PIC_PB_START_CODE    0x000001b6

  333. #define CAVS_VIDEO_EDIT_CODE      0x000001b7

  334. #define CAVS_PROFILE_JIZHUN       0x20

  335. 

  336. static int cavsvideo_probe(AVProbeData *p)

  337. {

  338.     uint32_t code= -1;

  339.     int pic=0, seq=0, slice_pos = 0;

  340.     int i;

  341. 

  342.     for(i=0; i<p->buf_size; i++){

  343.         code = (code<<8) + p->buf[i];

  344.         if ((code & 0xffffff00) == 0x100) {

  345.             if(code < CAVS_SEQ_START_CODE) {

  346.                 /* slices have to be consecutive */

  347.                 if(code < slice_pos)

  348.                     return 0;

  349.                 slice_pos = code;

  350.             } else {

  351.                 slice_pos = 0;

  352.             }

  353.             if (code == CAVS_SEQ_START_CODE) {

  354.                 seq++;

  355.                 /* check for the only currently supported profile */

  356.                 if(p->buf[i+1] != CAVS_PROFILE_JIZHUN)

  357.                     return 0;

  358.             } else if ((code == CAVS_PIC_I_START_CODE) ||

  359.                        (code == CAVS_PIC_PB_START_CODE)) {

  360.                 pic++;

  361.             } else if ((code == CAVS_UNDEF_START_CODE) ||

  362.                        (code >  CAVS_VIDEO_EDIT_CODE)) {

  363.                 return 0;

  364.             }

  365.         }

  366.     }

  367.     if(seq && seq*9<=pic*10)

  368.         return AVPROBE_SCORE_MAX/2;

  369.     return 0;

  370. }

  371. #endif

  372. 

  373. #if CONFIG_M4V_DEMUXER

  374. #define VISUAL_OBJECT_START_CODE       0x000001b5

  375. #define VOP_START_CODE                 0x000001b6

  376. 

  377. static int mpeg4video_probe(AVProbeData *probe_packet)

  378. {

  379.     uint32_t temp_buffer= -1;

  380.     int VO=0, VOL=0, VOP = 0, VISO = 0, res=0;

  381.     int i;

  382. 

  383.     for(i=0; i<probe_packet->buf_size; i++){

  384.         temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];

  385.         if ((temp_buffer & 0xffffff00) != 0x100)

  386.             continue;

  387. 

  388.         if (temp_buffer == VOP_START_CODE)                         VOP++;

  389.         else if (temp_buffer == VISUAL_OBJECT_START_CODE)          VISO++;

  390.         else if (temp_buffer < 0x120)                              VO++;

  391.         else if (temp_buffer < 0x130)                              VOL++;

  392.         else if (   !(0x1AF < temp_buffer && temp_buffer < 0x1B7)

  393.                  && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++;

  394.     }

  395. 

  396.     if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0)

  397.         return AVPROBE_SCORE_MAX/2;

  398.     return 0;

  399. }

  400. #endif

  401. 

  402. #if CONFIG_H264_DEMUXER

  403. static int h264_probe(AVProbeData *p)

  404. {

  405.     uint32_t code= -1;

  406.     int sps=0, pps=0, idr=0, res=0, sli=0;

  407.     int i;

  408. 

  409.     for(i=0; i<p->buf_size; i++){

  410.         code = (code<<8) + p->buf[i];

  411.         if ((code & 0xffffff00) == 0x100) {

  412.             int ref_idc= (code>>5)&3;

  413.             int type   = code & 0x1F;

  414.             static const int8_t ref_zero[32]={

  415.                 2, 0, 0, 0, 0,-1, 1,-1,

  416.                -1, 1, 1, 1, 1,-1, 2, 2,

  417.                 2, 2, 2, 0, 2, 2, 2, 2,

  418.                 2, 2, 2, 2, 2, 2, 2, 2

  419.             };

  420. 

  421.             if(code & 0x80) //forbidden bit

  422.                 return 0;

  423. 

  424.             if(ref_zero[type] == 1 && ref_idc)

  425.                 return 0;

  426.             if(ref_zero[type] ==-1 && !ref_idc)

  427.                 return 0;

  428.             if(ref_zero[type] == 2)

  429.                 res++;

  430. 

  431.             switch(type){

  432.             case     1:   sli++; break;

  433.             case     5:   idr++; break;

  434.             case     7:

  435.                 if(p->buf[i+2]&0x0F)

  436.                     return 0;

  437.                 sps++;

  438.                 break;

  439.             case     8:   pps++; break;

  440.             }

  441.         }

  442.     }

  443.     if(sps && pps && (idr||sli>3) && res<(sps+pps+idr))

  444.         return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg

  445.     return 0;

  446. }

  447. #endif

  448. 

  449. #if CONFIG_H263_DEMUXER

  450. static int h263_probe(AVProbeData *p)

  451. {

  452.     uint64_t code= -1;

  453.     int i;

  454.     int valid_psc=0;

  455.     int invalid_psc=0;

  456.     int res_change=0;

  457.     int src_fmt, last_src_fmt=-1;

  458. 

  459.     for(i=0; i<p->buf_size; i++){

  460.         code = (code<<8) + p->buf[i];

  461.         if ((code & 0xfffffc0000) == 0x800000) {

  462.             src_fmt= (code>>2)&3;

  463.             if(   src_fmt != last_src_fmt

  464.                && last_src_fmt>0 && last_src_fmt<6

  465.                && src_fmt<6)

  466.                 res_change++;

  467. 

  468.             if((code&0x300)==0x200 && src_fmt){

  469.                 valid_psc++;

  470.             }else

  471.                 invalid_psc++;

  472.             last_src_fmt= src_fmt;

  473.         }

  474.     }

  475. //av_log(NULL, AV_LOG_ERROR, "h263_probe: psc:%d invalid:%d res_change:%d\n", valid_psc, invalid_psc, res_change);

  476. //h263_probe: psc:3 invalid:0 res_change:0 (1588/recent_ffmpeg_parses_mpg_incorrectly.mpg)

  477.     if(valid_psc > 2*invalid_psc + 2*res_change + 3){

  478.         return 50;

  479.     }else if(valid_psc > 2*invalid_psc)

  480.         return 25;

  481.     return 0;

  482. }

  483. #endif

  484. 

  485. #if CONFIG_H261_DEMUXER

  486. static int h261_probe(AVProbeData *p)

  487. {

  488.     uint32_t code= -1;

  489.     int i;

  490.     int valid_psc=0;

  491.     int invalid_psc=0;

  492.     int next_gn=0;

  493.     int src_fmt=0;

  494.     GetBitContext gb;

  495. 

  496.     init_get_bits(&gb, p->buf, p->buf_size*8);

  497. 

  498.     for(i=0; i<p->buf_size*8; i++){

  499.         code = (code<<1) + get_bits1(&gb);

  500.         if ((code & 0xffff0000) == 0x10000) {

  501.             int gn= (code>>12)&0xf;

  502.             if(!gn)

  503.                 src_fmt= code&8;

  504.             if(gn != next_gn) invalid_psc++;

  505.             else              valid_psc++;

  506. 

  507.             if(src_fmt){ // CIF

  508.                 next_gn= (gn+1     )%13;

  509.             }else{       //QCIF

  510.                 next_gn= (gn+1+!!gn)% 7;

  511.             }

  512.         }

  513.     }

  514.     if(valid_psc > 2*invalid_psc + 6){

  515.         return 50;

  516.     }else if(valid_psc > 2*invalid_psc + 2)

  517.         return 25;

  518.     return 0;

  519. }

  520. #endif

  521. 

  522. #if CONFIG_DTS_DEMUXER

  523. #define DCA_MARKER_14B_BE 0x1FFFE800

  524. #define DCA_MARKER_14B_LE 0xFF1F00E8

  525. #define DCA_MARKER_RAW_BE 0x7FFE8001

  526. #define DCA_MARKER_RAW_LE 0xFE7F0180

  527. static int dts_probe(AVProbeData *p)

  528. {

  529.     const uint8_t *buf, *bufp;

  530.     uint32_t state = -1;

  531.     int markers[3] = {0};

  532.     int sum, max;

  533. 

  534.     buf = p->buf;

  535. 

  536.     for(; buf < (p->buf+p->buf_size)-2; buf+=2) {

  537.         bufp = buf;

  538.         state = (state << 16) | bytestream_get_be16(&bufp);

  539. 

  540.         /* regular bitstream */

  541.         if (state == DCA_MARKER_RAW_BE || state == DCA_MARKER_RAW_LE)

  542.             markers[0]++;

  543. 

  544.         /* 14 bits big-endian bitstream */

  545.         if (state == DCA_MARKER_14B_BE)

  546.             if ((bytestream_get_be16(&bufp) & 0xFFF0) == 0x07F0)

  547.                 markers[1]++;

  548. 

  549.         /* 14 bits little-endian bitstream */

  550.         if (state == DCA_MARKER_14B_LE)

  551.             if ((bytestream_get_be16(&bufp) & 0xF0FF) == 0xF007)

  552.                 markers[2]++;

  553.     }

  554.     sum = markers[0] + markers[1] + markers[2];

  555.     max = markers[1] > markers[0];

  556.     max = markers[2] > markers[max] ? 2 : max;

  557.     if (markers[max] > 3 && p->buf_size / markers[max] < 32*1024 &&

  558.         markers[max] * 4 > sum * 3)

  559.         return AVPROBE_SCORE_MAX/2+1;

  560. 

  561.     return 0;

  562. }

  563. #endif

  564. 

  565. #if CONFIG_DIRAC_DEMUXER

  566. static int dirac_probe(AVProbeData *p)

  567. {

  568.     if (AV_RL32(p->buf) == MKTAG('B', 'B', 'C', 'D'))

  569.         return AVPROBE_SCORE_MAX;

  570.     else

  571.         return 0;

  572. }

  573. #endif

  574. 

  575. #if CONFIG_DNXHD_DEMUXER

  576. static int dnxhd_probe(AVProbeData *p)

  577. {

  578.     static const uint8_t header[] = {0x00,0x00,0x02,0x80,0x01};

  579.     int w, h, compression_id;

  580.     if (p->buf_size < 0x2c)

  581.         return 0;

  582.     if (memcmp(p->buf, header, 5))

  583.         return 0;

  584.     h = AV_RB16(p->buf + 0x18);

  585.     w = AV_RB16(p->buf + 0x1a);

  586.     if (!w || !h)

  587.         return 0;

  588.     compression_id = AV_RB32(p->buf + 0x28);

  589.     if (compression_id < 1237 || compression_id > 1253)

  590.         return 0;

  591.     return AVPROBE_SCORE_MAX;

  592. }

  593. #endif

  594. 

  595. #if CONFIG_AC3_DEMUXER || CONFIG_EAC3_DEMUXER

  596. static int ac3_eac3_probe(AVProbeData *p, enum CodecID expected_codec_id)

  597. {

  598.     int max_frames, first_frames = 0, frames;

  599.     uint8_t *buf, *buf2, *end;

  600.     AC3HeaderInfo hdr;

  601.     GetBitContext gbc;

  602.     enum CodecID codec_id = CODEC_ID_AC3;

  603. 

  604.     max_frames = 0;

  605.     buf = p->buf;

  606.     end = buf + p->buf_size;

  607. 

  608.     for(; buf < end; buf++) {

  609.         buf2 = buf;

  610. 

  611.         for(frames = 0; buf2 < end; frames++) {

  612.             init_get_bits(&gbc, buf2, 54);

  613.             if(ff_ac3_parse_header(&gbc, &hdr) < 0)

  614.                 break;

  615.             if(buf2 + hdr.frame_size > end ||

  616.                av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, buf2 + 2, hdr.frame_size - 2))

  617.                 break;

  618.             if (hdr.bitstream_id > 10)

  619.                 codec_id = CODEC_ID_EAC3;

  620.             buf2 += hdr.frame_size;

  621.         }

  622.         max_frames = FFMAX(max_frames, frames);

  623.         if(buf == p->buf)

  624.             first_frames = frames;

  625.     }

  626.     if(codec_id != expected_codec_id) return 0;

  627.     // keep this in sync with mp3 probe, both need to avoid

  628.     // issues with MPEG-files!

  629.     if   (first_frames>=4) return AVPROBE_SCORE_MAX/2+1;

  630.     else if(max_frames>500)return AVPROBE_SCORE_MAX/2;

  631.     else if(max_frames>=4) return AVPROBE_SCORE_MAX/4;

  632.     else if(max_frames>=1) return 1;

  633.     else                   return 0;

  634. }

  635. #endif

  636. 

  637. #if CONFIG_AC3_DEMUXER

  638. static int ac3_probe(AVProbeData *p)

  639. {

  640.     return ac3_eac3_probe(p, CODEC_ID_AC3);

  641. }

  642. #endif

  643. 

  644. #if CONFIG_EAC3_DEMUXER

  645. static int eac3_probe(AVProbeData *p)

  646. {

  647.     return ac3_eac3_probe(p, CODEC_ID_EAC3);

  648. }

  649. #endif

  650. 

  651. #if CONFIG_AAC_DEMUXER

  652. static int adts_aac_probe(AVProbeData *p)

  653. {

  654.     int max_frames = 0, first_frames = 0;

  655.     int fsize, frames;

  656.     uint8_t *buf0 = p->buf;

  657.     uint8_t *buf2;

  658.     uint8_t *buf;

  659.     uint8_t *end = buf0 + p->buf_size - 7;

  660. 

  661.     if (ff_id3v2_match(buf0)) {

  662.         buf0 += ff_id3v2_tag_len(buf0);

  663.     }

  664.     buf = buf0;

  665. 

  666.     for(; buf < end; buf= buf2+1) {

  667.         buf2 = buf;

  668. 

  669.         for(frames = 0; buf2 < end; frames++) {

  670.             uint32_t header = AV_RB16(buf2);

  671.             if((header&0xFFF6) != 0xFFF0)

  672.                 break;

  673.             fsize = (AV_RB32(buf2+3)>>13) & 0x8FFF;

  674.             if(fsize < 7)

  675.                 break;

  676.             buf2 += fsize;

  677.         }

  678.         max_frames = FFMAX(max_frames, frames);

  679.         if(buf == buf0)

  680.             first_frames= frames;

  681.     }

  682.     if   (first_frames>=3) return AVPROBE_SCORE_MAX/2+1;

  683.     else if(max_frames>500)return AVPROBE_SCORE_MAX/2;

  684.     else if(max_frames>=3) return AVPROBE_SCORE_MAX/4;

  685.     else if(max_frames>=1) return 1;

  686.     else                   return 0;

  687. }

  688. 

  689. static int adts_aac_read_header(AVFormatContext *s,

  690.                                 AVFormatParameters *ap)

  691. {

  692.     AVStream *st;

  693. 

  694.     st = av_new_stream(s, 0);

  695.     if (!st)

  696.         return AVERROR(ENOMEM);

  697. 

  698.     st->codec->codec_type = CODEC_TYPE_AUDIO;

  699.     st->codec->codec_id = s->iformat->value;

  700.     st->need_parsing = AVSTREAM_PARSE_FULL;

  701. 

  702.     ff_id3v1_read(s);

  703.     ff_id3v2_read(s);

  704. 

  705.     return 0;

  706. }

  707. 

  708. #endif

  709. 

  710. /* Note: Do not forget to add new entries to the Makefile as well. */

  711. 

  712. #if CONFIG_AAC_DEMUXER

  713. AVInputFormat aac_demuxer = {

  714.     "aac",

  715.     NULL_IF_CONFIG_SMALL("raw ADTS AAC"),

  716.     0,

  717.     adts_aac_probe,

  718.     adts_aac_read_header,

  719.     ff_raw_read_partial_packet,

  720.     .flags= AVFMT_GENERIC_INDEX,

  721.     .extensions = "aac",

  722.     .value = CODEC_ID_AAC,

  723. };

  724. #endif

  725. 

  726. #if CONFIG_AC3_DEMUXER

  727. AVInputFormat ac3_demuxer = {

  728.     "ac3",

  729.     NULL_IF_CONFIG_SMALL("raw AC-3"),

  730.     0,

  731.     ac3_probe,

  732.     audio_read_header,

  733.     ff_raw_read_partial_packet,

  734.     .flags= AVFMT_GENERIC_INDEX,

  735.     .extensions = "ac3",

  736.     .value = CODEC_ID_AC3,

  737. };

  738. #endif

  739. 

  740. #if CONFIG_AC3_MUXER

  741. AVOutputFormat ac3_muxer = {

  742.     "ac3",

  743.     NULL_IF_CONFIG_SMALL("raw AC-3"),

  744.     "audio/x-ac3",

  745.     "ac3",

  746.     0,

  747.     CODEC_ID_AC3,

  748.     CODEC_ID_NONE,

  749.     NULL,

  750.     raw_write_packet,

  751.     .flags= AVFMT_NOTIMESTAMPS,

  752. };

  753. #endif

  754. 

  755. #if CONFIG_DIRAC_DEMUXER

  756. AVInputFormat dirac_demuxer = {

  757.     "dirac",

  758.     NULL_IF_CONFIG_SMALL("raw Dirac"),

  759.     0,

  760.     dirac_probe,

  761.     video_read_header,

  762.     ff_raw_read_partial_packet,

  763.     .flags= AVFMT_GENERIC_INDEX,

  764.     .value = CODEC_ID_DIRAC,

  765. };

  766. #endif

  767. 

  768. #if CONFIG_DIRAC_MUXER

  769. AVOutputFormat dirac_muxer = {

  770.     "dirac",

  771.     NULL_IF_CONFIG_SMALL("raw Dirac"),

  772.     NULL,

  773.     "drc",

  774.     0,

  775.     CODEC_ID_NONE,

  776.     CODEC_ID_DIRAC,

  777.     NULL,

  778.     raw_write_packet,

  779.     .flags= AVFMT_NOTIMESTAMPS,

  780. };

  781. #endif

  782. 

  783. #if CONFIG_DNXHD_DEMUXER

  784. AVInputFormat dnxhd_demuxer = {

  785.     "dnxhd",

  786.     NULL_IF_CONFIG_SMALL("raw DNxHD (SMPTE VC-3)"),

  787.     0,

  788.     dnxhd_probe,

  789.     video_read_header,

  790.     ff_raw_read_partial_packet,

  791.     .flags= AVFMT_GENERIC_INDEX,

  792.     .value = CODEC_ID_DNXHD,

  793. };

  794. #endif

  795. 

  796. #if CONFIG_DNXHD_MUXER

  797. AVOutputFormat dnxhd_muxer = {

  798.     "dnxhd",

  799.     NULL_IF_CONFIG_SMALL("raw DNxHD (SMPTE VC-3)"),

  800.     NULL,

  801.     "dnxhd",

  802.     0,

  803.     CODEC_ID_NONE,

  804.     CODEC_ID_DNXHD,

  805.     NULL,

  806.     raw_write_packet,

  807.     .flags= AVFMT_NOTIMESTAMPS,

  808. };

  809. #endif

  810. 

  811. #if CONFIG_DTS_DEMUXER

  812. AVInputFormat dts_demuxer = {

  813.     "dts",

  814.     NULL_IF_CONFIG_SMALL("raw DTS"),

  815.     0,

  816.     dts_probe,

  817.     audio_read_header,

  818.     ff_raw_read_partial_packet,

  819.     .flags= AVFMT_GENERIC_INDEX,

  820.     .extensions = "dts",

  821.     .value = CODEC_ID_DTS,

  822. };

  823. #endif

  824. 

  825. #if CONFIG_DTS_MUXER

  826. AVOutputFormat dts_muxer = {

  827.     "dts",

  828.     NULL_IF_CONFIG_SMALL("raw DTS"),

  829.     "audio/x-dca",

  830.     "dts",

  831.     0,

  832.     CODEC_ID_DTS,

  833.     CODEC_ID_NONE,

  834.     NULL,

  835.     raw_write_packet,

  836.     .flags= AVFMT_NOTIMESTAMPS,

  837. };

  838. #endif

  839. 

  840. #if CONFIG_EAC3_DEMUXER

  841. AVInputFormat eac3_demuxer = {

  842.     "eac3",

  843.     NULL_IF_CONFIG_SMALL("raw E-AC-3"),

  844.     0,

  845.     eac3_probe,

  846.     audio_read_header,

  847.     ff_raw_read_partial_packet,

  848.     .flags= AVFMT_GENERIC_INDEX,

  849.     .extensions = "eac3",

  850.     .value = CODEC_ID_EAC3,

  851. };

  852. #endif

  853. 

  854. #if CONFIG_EAC3_MUXER

  855. AVOutputFormat eac3_muxer = {

  856.     "eac3",

  857.     NULL_IF_CONFIG_SMALL("raw E-AC-3"),

  858.     "audio/x-eac3",

  859.     "eac3",

  860.     0,

  861.     CODEC_ID_EAC3,

  862.     CODEC_ID_NONE,

  863.     NULL,

  864.     raw_write_packet,

  865.     .flags= AVFMT_NOTIMESTAMPS,

  866. };

  867. #endif

  868. 

  869. #if CONFIG_GSM_DEMUXER

  870. AVInputFormat gsm_demuxer = {

  871.     "gsm",

  872.     NULL_IF_CONFIG_SMALL("raw GSM"),

  873.     0,

  874.     NULL,

  875.     audio_read_header,

  876.     ff_raw_read_partial_packet,

  877.     .flags= AVFMT_GENERIC_INDEX,

  878.     .extensions = "gsm",

  879.     .value = CODEC_ID_GSM,

  880. };

  881. #endif

  882. 

  883. #if CONFIG_H261_DEMUXER

  884. AVInputFormat h261_demuxer = {

  885.     "h261",

  886.     NULL_IF_CONFIG_SMALL("raw H.261"),

  887.     0,

  888.     h261_probe,

  889.     video_read_header,

  890.     ff_raw_read_partial_packet,

  891.     .flags= AVFMT_GENERIC_INDEX,

  892.     .extensions = "h261",

  893.     .value = CODEC_ID_H261,

  894. };

  895. #endif

  896. 

  897. #if CONFIG_H261_MUXER

  898. AVOutputFormat h261_muxer = {

  899.     "h261",

  900.     NULL_IF_CONFIG_SMALL("raw H.261"),

  901.     "video/x-h261",

  902.     "h261",

  903.     0,

  904.     CODEC_ID_NONE,

  905.     CODEC_ID_H261,

  906.     NULL,

  907.     raw_write_packet,

  908.     .flags= AVFMT_NOTIMESTAMPS,

  909. };

  910. #endif

  911. 

  912. #if CONFIG_H263_DEMUXER

  913. AVInputFormat h263_demuxer = {

  914.     "h263",

  915.     NULL_IF_CONFIG_SMALL("raw H.263"),

  916.     0,

  917.     h263_probe,

  918.     video_read_header,

  919.     ff_raw_read_partial_packet,

  920.     .flags= AVFMT_GENERIC_INDEX,

  921. //    .extensions = "h263", //FIXME remove after writing mpeg4_probe

  922.     .value = CODEC_ID_H263,

  923. };

  924. #endif

  925. 

  926. #if CONFIG_H263_MUXER

  927. AVOutputFormat h263_muxer = {

  928.     "h263",

  929.     NULL_IF_CONFIG_SMALL("raw H.263"),

  930.     "video/x-h263",

  931.     "h263",

  932.     0,

  933.     CODEC_ID_NONE,

  934.     CODEC_ID_H263,

  935.     NULL,

  936.     raw_write_packet,

  937.     .flags= AVFMT_NOTIMESTAMPS,

  938. };

  939. #endif

  940. 

  941. #if CONFIG_H264_DEMUXER

  942. AVInputFormat h264_demuxer = {

  943.     "h264",

  944.     NULL_IF_CONFIG_SMALL("raw H.264 video format"),

  945.     0,

  946.     h264_probe,

  947.     video_read_header,

  948.     ff_raw_read_partial_packet,

  949.     .flags= AVFMT_GENERIC_INDEX,

  950.     .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe

  951.     .value = CODEC_ID_H264,

  952. };

  953. #endif

  954. 

  955. #if CONFIG_H264_MUXER

  956. AVOutputFormat h264_muxer = {

  957.     "h264",

  958.     NULL_IF_CONFIG_SMALL("raw H.264 video format"),

  959.     NULL,

  960.     "h264",

  961.     0,

  962.     CODEC_ID_NONE,

  963.     CODEC_ID_H264,

  964.     NULL,

  965.     raw_write_packet,

  966.     .flags= AVFMT_NOTIMESTAMPS,

  967. };

  968. #endif

  969. 

  970. #if CONFIG_INGENIENT_DEMUXER

  971. AVInputFormat ingenient_demuxer = {

  972.     "ingenient",

  973.     NULL_IF_CONFIG_SMALL("raw Ingenient MJPEG"),

  974.     0,

  975.     NULL,

  976.     video_read_header,

  977.     ingenient_read_packet,

  978.     .flags= AVFMT_GENERIC_INDEX,

  979.     .extensions = "cgi", // FIXME

  980.     .value = CODEC_ID_MJPEG,

  981. };

  982. #endif

  983. 

  984. #if CONFIG_M4V_DEMUXER

  985. AVInputFormat m4v_demuxer = {

  986.     "m4v",

  987.     NULL_IF_CONFIG_SMALL("raw MPEG-4 video format"),

  988.     0,

  989.     mpeg4video_probe, /** probing for MPEG-4 data */

  990.     video_read_header,

  991.     ff_raw_read_partial_packet,

  992.     .flags= AVFMT_GENERIC_INDEX,

  993.     .extensions = "m4v",

  994.     .value = CODEC_ID_MPEG4,

  995. };

  996. #endif

  997. 

  998. #if CONFIG_M4V_MUXER

  999. AVOutputFormat m4v_muxer = {

  1000.     "m4v",

  1001.     NULL_IF_CONFIG_SMALL("raw MPEG-4 video format"),

  1002.     NULL,

  1003.     "m4v",

  1004.     0,

  1005.     CODEC_ID_NONE,

  1006.     CODEC_ID_MPEG4,

  1007.     NULL,

  1008.     raw_write_packet,

  1009.     .flags= AVFMT_NOTIMESTAMPS,

  1010. };

  1011. #endif

  1012. 

  1013. #if CONFIG_MJPEG_DEMUXER

  1014. AVInputFormat mjpeg_demuxer = {

  1015.     "mjpeg",

  1016.     NULL_IF_CONFIG_SMALL("raw MJPEG video"),

  1017.     0,

  1018.     NULL,

  1019.     video_read_header,

  1020.     ff_raw_read_partial_packet,

  1021.     .flags= AVFMT_GENERIC_INDEX,

  1022.     .extensions = "mjpg,mjpeg",

  1023.     .value = CODEC_ID_MJPEG,

  1024. };

  1025. #endif

  1026. 

  1027. #if CONFIG_MJPEG_MUXER

  1028. AVOutputFormat mjpeg_muxer = {

  1029.     "mjpeg",

  1030.     NULL_IF_CONFIG_SMALL("raw MJPEG video"),

  1031.     "video/x-mjpeg",

  1032.     "mjpg,mjpeg",

  1033.     0,

  1034.     CODEC_ID_NONE,

  1035.     CODEC_ID_MJPEG,

  1036.     NULL,

  1037.     raw_write_packet,

  1038.     .flags= AVFMT_NOTIMESTAMPS,

  1039. };

  1040. #endif

  1041. 

  1042. #if CONFIG_MLP_DEMUXER

  1043. AVInputFormat mlp_demuxer = {

  1044.     "mlp",

  1045.     NULL_IF_CONFIG_SMALL("raw MLP"),

  1046.     0,

  1047.     NULL,

  1048.     audio_read_header,

  1049.     ff_raw_read_partial_packet,

  1050.     .flags= AVFMT_GENERIC_INDEX,

  1051.     .extensions = "mlp",

  1052.     .value = CODEC_ID_MLP,

  1053. };

  1054. #endif

  1055. 

  1056. #if CONFIG_MLP_MUXER

  1057. AVOutputFormat mlp_muxer = {

  1058.     "mlp",

  1059.     NULL_IF_CONFIG_SMALL("raw MLP"),

  1060.     NULL,

  1061.     "mlp",

  1062.     0,

  1063.     CODEC_ID_MLP,

  1064.     CODEC_ID_NONE,

  1065.     NULL,

  1066.     raw_write_packet,

  1067.     .flags= AVFMT_NOTIMESTAMPS,

  1068. };

  1069. #endif

  1070. 

  1071. #if CONFIG_TRUEHD_DEMUXER

  1072. AVInputFormat truehd_demuxer = {

  1073.     "truehd",

  1074.     NULL_IF_CONFIG_SMALL("raw TrueHD"),

  1075.     0,

  1076.     NULL,

  1077.     audio_read_header,

  1078.     ff_raw_read_partial_packet,

  1079.     .flags= AVFMT_GENERIC_INDEX,

  1080.     .extensions = "thd",

  1081.     .value = CODEC_ID_TRUEHD,

  1082. };

  1083. #endif

  1084. 

  1085. #if CONFIG_TRUEHD_MUXER

  1086. AVOutputFormat truehd_muxer = {

  1087.     "truehd",

  1088.     NULL_IF_CONFIG_SMALL("raw TrueHD"),

  1089.     NULL,

  1090.     "thd",

  1091.     0,

  1092.     CODEC_ID_TRUEHD,

  1093.     CODEC_ID_NONE,

  1094.     NULL,

  1095.     raw_write_packet,

  1096.     .flags= AVFMT_NOTIMESTAMPS,

  1097. };

  1098. #endif

  1099. 

  1100. #if CONFIG_MPEG1VIDEO_MUXER

  1101. AVOutputFormat mpeg1video_muxer = {

  1102.     "mpeg1video",

  1103.     NULL_IF_CONFIG_SMALL("raw MPEG-1 video"),

  1104.     "video/x-mpeg",

  1105.     "mpg,mpeg,m1v",

  1106.     0,

  1107.     CODEC_ID_NONE,

  1108.     CODEC_ID_MPEG1VIDEO,

  1109.     NULL,

  1110.     raw_write_packet,

  1111.     .flags= AVFMT_NOTIMESTAMPS,

  1112. };

  1113. #endif

  1114. 

  1115. #if CONFIG_MPEG2VIDEO_MUXER

  1116. AVOutputFormat mpeg2video_muxer = {

  1117.     "mpeg2video",

  1118.     NULL_IF_CONFIG_SMALL("raw MPEG-2 video"),

  1119.     NULL,

  1120.     "m2v",

  1121.     0,

  1122.     CODEC_ID_NONE,

  1123.     CODEC_ID_MPEG2VIDEO,

  1124.     NULL,

  1125.     raw_write_packet,

  1126.     .flags= AVFMT_NOTIMESTAMPS,

  1127. };

  1128. #endif

  1129. 

  1130. #if CONFIG_MPEGVIDEO_DEMUXER

  1131. AVInputFormat mpegvideo_demuxer = {

  1132.     "mpegvideo",

  1133.     NULL_IF_CONFIG_SMALL("raw MPEG video"),

  1134.     0,

  1135.     mpegvideo_probe,

  1136.     video_read_header,

  1137.     ff_raw_read_partial_packet,

  1138.     .flags= AVFMT_GENERIC_INDEX,

  1139.     .value = CODEC_ID_MPEG1VIDEO,

  1140. };

  1141. #endif

  1142. 

  1143. #if CONFIG_CAVSVIDEO_DEMUXER

  1144. AVInputFormat cavsvideo_demuxer = {

  1145.     "cavsvideo",

  1146.     NULL_IF_CONFIG_SMALL("raw Chinese AVS video"),

  1147.     0,

  1148.     cavsvideo_probe,

  1149.     video_read_header,

  1150.     ff_raw_read_partial_packet,

  1151.     .flags= AVFMT_GENERIC_INDEX,

  1152.     .value = CODEC_ID_CAVS,

  1153. };

  1154. #endif

  1155. 

  1156. #if CONFIG_NULL_MUXER

  1157. AVOutputFormat null_muxer = {

  1158.     "null",

  1159.     NULL_IF_CONFIG_SMALL("raw null video format"),

  1160.     NULL,

  1161.     NULL,

  1162.     0,

  1163. #if HAVE_BIGENDIAN

  1164.     CODEC_ID_PCM_S16BE,

  1165. #else

  1166.     CODEC_ID_PCM_S16LE,

  1167. #endif

  1168.     CODEC_ID_RAWVIDEO,

  1169.     NULL,

  1170.     null_write_packet,

  1171.     .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,

  1172. };

  1173. #endif

  1174. 

  1175. #if CONFIG_RAWVIDEO_DEMUXER

  1176. AVInputFormat rawvideo_demuxer = {

  1177.     "rawvideo",

  1178.     NULL_IF_CONFIG_SMALL("raw video format"),

  1179.     0,

  1180.     NULL,

  1181.     raw_read_header,

  1182.     rawvideo_read_packet,

  1183.     .flags= AVFMT_GENERIC_INDEX,

  1184.     .extensions = "yuv,cif,qcif,rgb",

  1185.     .value = CODEC_ID_RAWVIDEO,

  1186. };

  1187. #endif

  1188. 

  1189. #if CONFIG_RAWVIDEO_MUXER

  1190. AVOutputFormat rawvideo_muxer = {

  1191.     "rawvideo",

  1192.     NULL_IF_CONFIG_SMALL("raw video format"),

  1193.     NULL,

  1194.     "yuv,rgb",

  1195.     0,

  1196.     CODEC_ID_NONE,

  1197.     CODEC_ID_RAWVIDEO,

  1198.     NULL,

  1199.     raw_write_packet,

  1200.     .flags= AVFMT_NOTIMESTAMPS,

  1201. };

  1202. #endif

  1203. 

  1204. #if CONFIG_ROQ_MUXER

  1205. AVOutputFormat roq_muxer =

  1206. {

  1207.     "RoQ",

  1208.     NULL_IF_CONFIG_SMALL("raw id RoQ format"),

  1209.     NULL,

  1210.     "roq",

  1211.     0,

  1212.     CODEC_ID_ROQ_DPCM,

  1213.     CODEC_ID_ROQ,

  1214.     roq_write_header,

  1215.     raw_write_packet,

  1216. };

  1217. #endif

  1218. 

  1219. #if CONFIG_SHORTEN_DEMUXER

  1220. AVInputFormat shorten_demuxer = {

  1221.     "shn",

  1222.     NULL_IF_CONFIG_SMALL("raw Shorten"),

  1223.     0,

  1224.     NULL,

  1225.     audio_read_header,

  1226.     ff_raw_read_partial_packet,

  1227.     .flags= AVFMT_GENERIC_INDEX,

  1228.     .extensions = "shn",

  1229.     .value = CODEC_ID_SHORTEN,

  1230. };

  1231. #endif

  1232. 

  1233. #if CONFIG_VC1_DEMUXER

  1234. AVInputFormat vc1_demuxer = {

  1235.     "vc1",

  1236.     NULL_IF_CONFIG_SMALL("raw VC-1"),

  1237.     0,

  1238.     NULL /* vc1_probe */,

  1239.     video_read_header,

  1240.     ff_raw_read_partial_packet,

  1241.     .extensions = "vc1",

  1242.     .value = CODEC_ID_VC1,

  1243. };

  1244. #endif

  1245. 

  1246. /* PCM formats */

  1247. 

  1248. #define PCMINPUTDEF(name, long_name, ext, codec) \

  1249. AVInputFormat pcm_ ## name ## _demuxer = {\

  1250.     #name,\

  1251.     NULL_IF_CONFIG_SMALL(long_name),\

  1252.     0,\

  1253.     NULL,\

  1254.     raw_read_header,\

  1255.     raw_read_packet,\

  1256.     NULL,\

  1257.     pcm_read_seek,\

  1258.     .flags= AVFMT_GENERIC_INDEX,\

  1259.     .extensions = ext,\

  1260.     .value = codec,\

  1261. };

  1262. 

  1263. #define PCMOUTPUTDEF(name, long_name, ext, codec) \

  1264. AVOutputFormat pcm_ ## name ## _muxer = {\

  1265.     #name,\

  1266.     NULL_IF_CONFIG_SMALL(long_name),\

  1267.     NULL,\

  1268.     ext,\

  1269.     0,\

  1270.     codec,\

  1271.     CODEC_ID_NONE,\

  1272.     NULL,\

  1273.     raw_write_packet,\

  1274.     .flags= AVFMT_NOTIMESTAMPS,\

  1275. };

  1276. 

  1277. 

  1278. #if  !CONFIG_MUXERS && CONFIG_DEMUXERS

  1279. #define PCMDEF(name, long_name, ext, codec) \

  1280.         PCMINPUTDEF(name, long_name, ext, codec)

  1281. #elif CONFIG_MUXERS && !CONFIG_DEMUXERS

  1282. #define PCMDEF(name, long_name, ext, codec) \

  1283.         PCMOUTPUTDEF(name, long_name, ext, codec)

  1284. #elif CONFIG_MUXERS && CONFIG_DEMUXERS

  1285. #define PCMDEF(name, long_name, ext, codec) \

  1286.         PCMINPUTDEF(name, long_name, ext, codec)\

  1287.         PCMOUTPUTDEF(name, long_name, ext, codec)

  1288. #else

  1289. #define PCMDEF(name, long_name, ext, codec)

  1290. #endif

  1291. 

  1292. #if HAVE_BIGENDIAN

  1293. #define BE_DEF(s) s

  1294. #define LE_DEF(s) NULL

  1295. #else

  1296. #define BE_DEF(s) NULL

  1297. #define LE_DEF(s) s

  1298. #endif

  1299. 

  1300. PCMDEF(f64be, "PCM 64 bit floating-point big-endian format",

  1301.        NULL, CODEC_ID_PCM_F64BE)

  1302. 

  1303. PCMDEF(f64le, "PCM 64 bit floating-point little-endian format",

  1304.        NULL, CODEC_ID_PCM_F64LE)

  1305. 

  1306. PCMDEF(f32be, "PCM 32 bit floating-point big-endian format",

  1307.        NULL, CODEC_ID_PCM_F32BE)

  1308. 

  1309. PCMDEF(f32le, "PCM 32 bit floating-point little-endian format",

  1310.        NULL, CODEC_ID_PCM_F32LE)

  1311. 

  1312. PCMDEF(s32be, "PCM signed 32 bit big-endian format",

  1313.        NULL, CODEC_ID_PCM_S32BE)

  1314. 

  1315. PCMDEF(s32le, "PCM signed 32 bit little-endian format",

  1316.        NULL, CODEC_ID_PCM_S32LE)

  1317. 

  1318. PCMDEF(s24be, "PCM signed 24 bit big-endian format",

  1319.        NULL, CODEC_ID_PCM_S24BE)

  1320. 

  1321. PCMDEF(s24le, "PCM signed 24 bit little-endian format",

  1322.        NULL, CODEC_ID_PCM_S24LE)

  1323. 

  1324. PCMDEF(s16be, "PCM signed 16 bit big-endian format",

  1325.        BE_DEF("sw"), CODEC_ID_PCM_S16BE)

  1326. 

  1327. PCMDEF(s16le, "PCM signed 16 bit little-endian format",

  1328.        LE_DEF("sw"), CODEC_ID_PCM_S16LE)

  1329. 

  1330. PCMDEF(s8, "PCM signed 8 bit format",

  1331.        "sb", CODEC_ID_PCM_S8)

  1332. 

  1333. PCMDEF(u32be, "PCM unsigned 32 bit big-endian format",

  1334.        NULL, CODEC_ID_PCM_U32BE)

  1335. 

  1336. PCMDEF(u32le, "PCM unsigned 32 bit little-endian format",

  1337.        NULL, CODEC_ID_PCM_U32LE)

  1338. 

  1339. PCMDEF(u24be, "PCM unsigned 24 bit big-endian format",

  1340.        NULL, CODEC_ID_PCM_U24BE)

  1341. 

  1342. PCMDEF(u24le, "PCM unsigned 24 bit little-endian format",

  1343.        NULL, CODEC_ID_PCM_U24LE)

  1344. 

  1345. PCMDEF(u16be, "PCM unsigned 16 bit big-endian format",

  1346.        BE_DEF("uw"), CODEC_ID_PCM_U16BE)

  1347. 

  1348. PCMDEF(u16le, "PCM unsigned 16 bit little-endian format",

  1349.        LE_DEF("uw"), CODEC_ID_PCM_U16LE)

  1350. 

  1351. PCMDEF(u8, "PCM unsigned 8 bit format",

  1352.        "ub", CODEC_ID_PCM_U8)

  1353. 

  1354. PCMDEF(alaw, "PCM A-law format",

  1355.        "al", CODEC_ID_PCM_ALAW)

  1356. 

  1357. PCMDEF(mulaw, "PCM mu-law format",

  1358.        "ul", CODEC_ID_PCM_MULAW)