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00028 #include "libavutil/intreadwrite.h"
00029 #include "avformat.h"
00030
00031 #define SCHl_TAG MKTAG('S', 'C', 'H', 'l')
00032 #define SEAD_TAG MKTAG('S', 'E', 'A', 'D')
00033 #define SNDC_TAG MKTAG('S', 'N', 'D', 'C')
00034 #define SEND_TAG MKTAG('S', 'E', 'N', 'D')
00035 #define SHEN_TAG MKTAG('S', 'H', 'E', 'N')
00036 #define SDEN_TAG MKTAG('S', 'D', 'E', 'N')
00037 #define SEEN_TAG MKTAG('S', 'E', 'E', 'N')
00038 #define ISNh_TAG MKTAG('1', 'S', 'N', 'h')
00039 #define EACS_TAG MKTAG('E', 'A', 'C', 'S')
00040 #define ISNd_TAG MKTAG('1', 'S', 'N', 'd')
00041 #define ISNe_TAG MKTAG('1', 'S', 'N', 'e')
00042 #define PT00_TAG MKTAG('P', 'T', 0x0, 0x0)
00043 #define GSTR_TAG MKTAG('G', 'S', 'T', 'R')
00044 #define SCDl_TAG MKTAG('S', 'C', 'D', 'l')
00045 #define SCEl_TAG MKTAG('S', 'C', 'E', 'l')
00046 #define kVGT_TAG MKTAG('k', 'V', 'G', 'T')
00047 #define fVGT_TAG MKTAG('f', 'V', 'G', 'T')
00048 #define mTCD_TAG MKTAG('m', 'T', 'C', 'D')
00049 #define MADk_TAG MKTAG('M', 'A', 'D', 'k')
00050 #define MADm_TAG MKTAG('M', 'A', 'D', 'm')
00051 #define MADe_TAG MKTAG('M', 'A', 'D', 'e')
00052 #define MPCh_TAG MKTAG('M', 'P', 'C', 'h')
00053 #define TGQs_TAG MKTAG('T', 'G', 'Q', 's')
00054 #define pQGT_TAG MKTAG('p', 'Q', 'G', 'T')
00055 #define pIQT_TAG MKTAG('p', 'I', 'Q', 'T')
00056 #define MVhd_TAG MKTAG('M', 'V', 'h', 'd')
00057 #define MV0K_TAG MKTAG('M', 'V', '0', 'K')
00058 #define MV0F_TAG MKTAG('M', 'V', '0', 'F')
00059 #define MVIh_TAG MKTAG('M', 'V', 'I', 'h')
00060 #define MVIf_TAG MKTAG('M', 'V', 'I', 'f')
00061
00062 typedef struct EaDemuxContext {
00063 int big_endian;
00064
00065 enum CodecID video_codec;
00066 AVRational time_base;
00067 int width, height;
00068 int video_stream_index;
00069
00070 enum CodecID audio_codec;
00071 int audio_stream_index;
00072 int audio_frame_counter;
00073
00074 int bytes;
00075 int sample_rate;
00076 int num_channels;
00077 int num_samples;
00078 } EaDemuxContext;
00079
00080 static uint32_t read_arbitary(ByteIOContext *pb) {
00081 uint8_t size, byte;
00082 int i;
00083 uint32_t word;
00084
00085 size = get_byte(pb);
00086
00087 word = 0;
00088 for (i = 0; i < size; i++) {
00089 byte = get_byte(pb);
00090 word <<= 8;
00091 word |= byte;
00092 }
00093
00094 return word;
00095 }
00096
00097
00098
00099
00100
00101 static int process_audio_header_elements(AVFormatContext *s)
00102 {
00103 int inHeader = 1;
00104 EaDemuxContext *ea = s->priv_data;
00105 ByteIOContext *pb = s->pb;
00106 int compression_type = -1, revision = -1, revision2 = -1;
00107
00108 ea->bytes = 2;
00109 ea->sample_rate = -1;
00110 ea->num_channels = 1;
00111
00112 while (inHeader) {
00113 int inSubheader;
00114 uint8_t byte;
00115 byte = get_byte(pb);
00116
00117 switch (byte) {
00118 case 0xFD:
00119 av_log (s, AV_LOG_DEBUG, "entered audio subheader\n");
00120 inSubheader = 1;
00121 while (inSubheader) {
00122 uint8_t subbyte;
00123 subbyte = get_byte(pb);
00124
00125 switch (subbyte) {
00126 case 0x80:
00127 revision = read_arbitary(pb);
00128 av_log (s, AV_LOG_DEBUG, "revision (element 0x80) set to 0x%08x\n", revision);
00129 break;
00130 case 0x82:
00131 ea->num_channels = read_arbitary(pb);
00132 av_log (s, AV_LOG_DEBUG, "num_channels (element 0x82) set to 0x%08x\n", ea->num_channels);
00133 break;
00134 case 0x83:
00135 compression_type = read_arbitary(pb);
00136 av_log (s, AV_LOG_DEBUG, "compression_type (element 0x83) set to 0x%08x\n", compression_type);
00137 break;
00138 case 0x84:
00139 ea->sample_rate = read_arbitary(pb);
00140 av_log (s, AV_LOG_DEBUG, "sample_rate (element 0x84) set to %i\n", ea->sample_rate);
00141 break;
00142 case 0x85:
00143 ea->num_samples = read_arbitary(pb);
00144 av_log (s, AV_LOG_DEBUG, "num_samples (element 0x85) set to 0x%08x\n", ea->num_samples);
00145 break;
00146 case 0x8A:
00147 av_log (s, AV_LOG_DEBUG, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
00148 av_log (s, AV_LOG_DEBUG, "exited audio subheader\n");
00149 inSubheader = 0;
00150 break;
00151 case 0xA0:
00152 revision2 = read_arbitary(pb);
00153 av_log (s, AV_LOG_DEBUG, "revision2 (element 0xA0) set to 0x%08x\n", revision2);
00154 break;
00155 case 0xFF:
00156 av_log (s, AV_LOG_DEBUG, "end of header block reached (within audio subheader)\n");
00157 inSubheader = 0;
00158 inHeader = 0;
00159 break;
00160 default:
00161 av_log (s, AV_LOG_DEBUG, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
00162 break;
00163 }
00164 }
00165 break;
00166 case 0xFF:
00167 av_log (s, AV_LOG_DEBUG, "end of header block reached\n");
00168 inHeader = 0;
00169 break;
00170 default:
00171 av_log (s, AV_LOG_DEBUG, "header element 0x%02x set to 0x%08x\n", byte, read_arbitary(pb));
00172 break;
00173 }
00174 }
00175
00176 switch (compression_type) {
00177 case 0: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
00178 case 7: ea->audio_codec = CODEC_ID_ADPCM_EA; break;
00179 case -1:
00180 switch (revision) {
00181 case 1: ea->audio_codec = CODEC_ID_ADPCM_EA_R1; break;
00182 case 2: ea->audio_codec = CODEC_ID_ADPCM_EA_R2; break;
00183 case 3: ea->audio_codec = CODEC_ID_ADPCM_EA_R3; break;
00184 case -1: break;
00185 default:
00186 av_log(s, AV_LOG_ERROR, "unsupported stream type; revision=%i\n", revision);
00187 return 0;
00188 }
00189 switch (revision2) {
00190 case 8: ea->audio_codec = CODEC_ID_PCM_S16LE_PLANAR; break;
00191 case 10: ea->audio_codec = CODEC_ID_ADPCM_EA_R2; break;
00192 case 16: ea->audio_codec = CODEC_ID_MP3; break;
00193 case -1: break;
00194 default:
00195 ea->audio_codec = CODEC_ID_NONE;
00196 av_log(s, AV_LOG_ERROR, "unsupported stream type; revision2=%i\n", revision2);
00197 return 0;
00198 }
00199 break;
00200 default:
00201 av_log(s, AV_LOG_ERROR, "unsupported stream type; compression_type=%i\n", compression_type);
00202 return 0;
00203 }
00204
00205 if (ea->sample_rate == -1)
00206 ea->sample_rate = revision==3 ? 48000 : 22050;
00207
00208 return 1;
00209 }
00210
00211
00212
00213
00214
00215 static int process_audio_header_eacs(AVFormatContext *s)
00216 {
00217 EaDemuxContext *ea = s->priv_data;
00218 ByteIOContext *pb = s->pb;
00219 int compression_type;
00220
00221 ea->sample_rate = ea->big_endian ? get_be32(pb) : get_le32(pb);
00222 ea->bytes = get_byte(pb);
00223 ea->num_channels = get_byte(pb);
00224 compression_type = get_byte(pb);
00225 url_fskip(pb, 13);
00226
00227 switch (compression_type) {
00228 case 0:
00229 switch (ea->bytes) {
00230 case 1: ea->audio_codec = CODEC_ID_PCM_S8; break;
00231 case 2: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
00232 }
00233 break;
00234 case 1: ea->audio_codec = CODEC_ID_PCM_MULAW; ea->bytes = 1; break;
00235 case 2: ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_EACS; break;
00236 default:
00237 av_log (s, AV_LOG_ERROR, "unsupported stream type; audio compression_type=%i\n", compression_type);
00238 }
00239
00240 return 1;
00241 }
00242
00243
00244
00245
00246
00247 static int process_audio_header_sead(AVFormatContext *s)
00248 {
00249 EaDemuxContext *ea = s->priv_data;
00250 ByteIOContext *pb = s->pb;
00251
00252 ea->sample_rate = get_le32(pb);
00253 ea->bytes = get_le32(pb);
00254 ea->num_channels = get_le32(pb);
00255 ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_SEAD;
00256
00257 return 1;
00258 }
00259
00260 static int process_video_header_mdec(AVFormatContext *s)
00261 {
00262 EaDemuxContext *ea = s->priv_data;
00263 ByteIOContext *pb = s->pb;
00264 url_fskip(pb, 4);
00265 ea->width = get_le16(pb);
00266 ea->height = get_le16(pb);
00267 ea->time_base = (AVRational){1,15};
00268 ea->video_codec = CODEC_ID_MDEC;
00269 return 1;
00270 }
00271
00272 static int process_video_header_vp6(AVFormatContext *s)
00273 {
00274 EaDemuxContext *ea = s->priv_data;
00275 ByteIOContext *pb = s->pb;
00276
00277 url_fskip(pb, 16);
00278 ea->time_base.den = get_le32(pb);
00279 ea->time_base.num = get_le32(pb);
00280 ea->video_codec = CODEC_ID_VP6;
00281
00282 return 1;
00283 }
00284
00285
00286
00287
00288
00289 static int process_ea_header(AVFormatContext *s) {
00290 uint32_t blockid, size = 0;
00291 EaDemuxContext *ea = s->priv_data;
00292 ByteIOContext *pb = s->pb;
00293 int i;
00294
00295 for (i=0; i<5 && (!ea->audio_codec || !ea->video_codec); i++) {
00296 unsigned int startpos = url_ftell(pb);
00297 int err = 0;
00298
00299 blockid = get_le32(pb);
00300 size = get_le32(pb);
00301 if (i == 0)
00302 ea->big_endian = size > 0x000FFFFF;
00303 if (ea->big_endian)
00304 size = bswap_32(size);
00305
00306 switch (blockid) {
00307 case ISNh_TAG:
00308 if (get_le32(pb) != EACS_TAG) {
00309 av_log (s, AV_LOG_ERROR, "unknown 1SNh headerid\n");
00310 return 0;
00311 }
00312 err = process_audio_header_eacs(s);
00313 break;
00314
00315 case SCHl_TAG :
00316 case SHEN_TAG :
00317 blockid = get_le32(pb);
00318 if (blockid == GSTR_TAG) {
00319 url_fskip(pb, 4);
00320 } else if ((blockid & 0xFFFF)!=PT00_TAG) {
00321 av_log (s, AV_LOG_ERROR, "unknown SCHl headerid\n");
00322 return 0;
00323 }
00324 err = process_audio_header_elements(s);
00325 break;
00326
00327 case SEAD_TAG:
00328 err = process_audio_header_sead(s);
00329 break;
00330
00331 case MVIh_TAG :
00332 ea->video_codec = CODEC_ID_CMV;
00333 ea->time_base = (AVRational){0,0};
00334 break;
00335
00336 case kVGT_TAG:
00337 ea->video_codec = CODEC_ID_TGV;
00338 ea->time_base = (AVRational){0,0};
00339 break;
00340
00341 case mTCD_TAG :
00342 err = process_video_header_mdec(s);
00343 break;
00344
00345 case MPCh_TAG:
00346 ea->video_codec = CODEC_ID_MPEG2VIDEO;
00347 break;
00348
00349 case pQGT_TAG:
00350 case TGQs_TAG:
00351 ea->video_codec = CODEC_ID_TGQ;
00352 break;
00353
00354 case pIQT_TAG:
00355 ea->video_codec = CODEC_ID_TQI;
00356 break;
00357
00358 case MADk_TAG :
00359 ea->video_codec = CODEC_ID_MAD;
00360 break;
00361
00362 case MVhd_TAG :
00363 err = process_video_header_vp6(s);
00364 break;
00365 }
00366
00367 if (err < 0) {
00368 av_log(s, AV_LOG_ERROR, "error parsing header: %i\n", err);
00369 return err;
00370 }
00371
00372 url_fseek(pb, startpos + size, SEEK_SET);
00373 }
00374
00375 url_fseek(pb, 0, SEEK_SET);
00376
00377 return 1;
00378 }
00379
00380
00381 static int ea_probe(AVProbeData *p)
00382 {
00383 switch (AV_RL32(&p->buf[0])) {
00384 case ISNh_TAG:
00385 case SCHl_TAG:
00386 case SEAD_TAG:
00387 case SHEN_TAG:
00388 case kVGT_TAG:
00389 case MADk_TAG:
00390 case MPCh_TAG:
00391 case MVhd_TAG:
00392 case MVIh_TAG:
00393 break;
00394 default:
00395 return 0;
00396 }
00397 if (AV_RL32(&p->buf[4]) > 0xfffff && AV_RB32(&p->buf[4]) > 0xfffff)
00398 return 0;
00399 return AVPROBE_SCORE_MAX;
00400 }
00401
00402 static int ea_read_header(AVFormatContext *s,
00403 AVFormatParameters *ap)
00404 {
00405 EaDemuxContext *ea = s->priv_data;
00406 AVStream *st;
00407
00408 if (!process_ea_header(s))
00409 return AVERROR(EIO);
00410
00411 if (ea->video_codec) {
00412
00413 st = av_new_stream(s, 0);
00414 if (!st)
00415 return AVERROR(ENOMEM);
00416 ea->video_stream_index = st->index;
00417 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00418 st->codec->codec_id = ea->video_codec;
00419 st->codec->codec_tag = 0;
00420 st->codec->time_base = ea->time_base;
00421 st->codec->width = ea->width;
00422 st->codec->height = ea->height;
00423 }
00424
00425 if (ea->audio_codec) {
00426
00427 st = av_new_stream(s, 0);
00428 if (!st)
00429 return AVERROR(ENOMEM);
00430 av_set_pts_info(st, 33, 1, ea->sample_rate);
00431 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
00432 st->codec->codec_id = ea->audio_codec;
00433 st->codec->codec_tag = 0;
00434 st->codec->channels = ea->num_channels;
00435 st->codec->sample_rate = ea->sample_rate;
00436 st->codec->bits_per_coded_sample = ea->bytes * 8;
00437 st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
00438 st->codec->bits_per_coded_sample / 4;
00439 st->codec->block_align = st->codec->channels*st->codec->bits_per_coded_sample;
00440 ea->audio_stream_index = st->index;
00441 ea->audio_frame_counter = 0;
00442 }
00443
00444 return 1;
00445 }
00446
00447 static int ea_read_packet(AVFormatContext *s,
00448 AVPacket *pkt)
00449 {
00450 EaDemuxContext *ea = s->priv_data;
00451 ByteIOContext *pb = s->pb;
00452 int ret = 0;
00453 int packet_read = 0;
00454 unsigned int chunk_type, chunk_size;
00455 int key = 0;
00456 int av_uninit(num_samples);
00457
00458 while (!packet_read) {
00459 chunk_type = get_le32(pb);
00460 chunk_size = ea->big_endian ? get_be32(pb) : get_le32(pb);
00461 if (chunk_size <= 8)
00462 return AVERROR_INVALIDDATA;
00463 chunk_size -= 8;
00464
00465 switch (chunk_type) {
00466
00467 case ISNh_TAG:
00468
00469 if (chunk_size < 32)
00470 return AVERROR_INVALIDDATA;
00471 url_fskip(pb, 32);
00472 chunk_size -= 32;
00473 case ISNd_TAG:
00474 case SCDl_TAG:
00475 case SNDC_TAG:
00476 case SDEN_TAG:
00477 if (!ea->audio_codec) {
00478 url_fskip(pb, chunk_size);
00479 break;
00480 } else if (ea->audio_codec == CODEC_ID_PCM_S16LE_PLANAR ||
00481 ea->audio_codec == CODEC_ID_MP3) {
00482 num_samples = get_le32(pb);
00483 url_fskip(pb, 8);
00484 chunk_size -= 12;
00485 }
00486 ret = av_get_packet(pb, pkt, chunk_size);
00487 if (ret < 0)
00488 return ret;
00489 pkt->stream_index = ea->audio_stream_index;
00490 pkt->pts = 90000;
00491 pkt->pts *= ea->audio_frame_counter;
00492 pkt->pts /= ea->sample_rate;
00493
00494 switch (ea->audio_codec) {
00495 case CODEC_ID_ADPCM_EA:
00496
00497
00498 ea->audio_frame_counter += ((chunk_size - 12) * 2) /
00499 ea->num_channels;
00500 break;
00501 case CODEC_ID_PCM_S16LE_PLANAR:
00502 case CODEC_ID_MP3:
00503 ea->audio_frame_counter += num_samples;
00504 break;
00505 default:
00506 ea->audio_frame_counter += chunk_size /
00507 (ea->bytes * ea->num_channels);
00508 }
00509
00510 packet_read = 1;
00511 break;
00512
00513
00514 case 0:
00515 case ISNe_TAG:
00516 case SCEl_TAG:
00517 case SEND_TAG:
00518 case SEEN_TAG:
00519 ret = AVERROR(EIO);
00520 packet_read = 1;
00521 break;
00522
00523 case MVIh_TAG:
00524 case kVGT_TAG:
00525 case pQGT_TAG:
00526 case TGQs_TAG:
00527 case MADk_TAG:
00528 key = AV_PKT_FLAG_KEY;
00529 case MVIf_TAG:
00530 case fVGT_TAG:
00531 case MADm_TAG:
00532 case MADe_TAG:
00533 url_fseek(pb, -8, SEEK_CUR);
00534 chunk_size += 8;
00535 goto get_video_packet;
00536
00537 case mTCD_TAG:
00538 url_fseek(pb, 8, SEEK_CUR);
00539 chunk_size -= 8;
00540 goto get_video_packet;
00541
00542 case MV0K_TAG:
00543 case MPCh_TAG:
00544 case pIQT_TAG:
00545 key = AV_PKT_FLAG_KEY;
00546 case MV0F_TAG:
00547 get_video_packet:
00548 ret = av_get_packet(pb, pkt, chunk_size);
00549 if (ret < 0)
00550 return ret;
00551 pkt->stream_index = ea->video_stream_index;
00552 pkt->flags |= key;
00553 packet_read = 1;
00554 break;
00555
00556 default:
00557 url_fseek(pb, chunk_size, SEEK_CUR);
00558 break;
00559 }
00560 }
00561
00562 return ret;
00563 }
00564
00565 AVInputFormat ea_demuxer = {
00566 "ea",
00567 NULL_IF_CONFIG_SMALL("Electronic Arts Multimedia Format"),
00568 sizeof(EaDemuxContext),
00569 ea_probe,
00570 ea_read_header,
00571 ea_read_packet,
00572 };