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00027 #include "avformat.h"
00028
00029 #define SCHl_TAG MKTAG('S', 'C', 'H', 'l')
00030 #define SEAD_TAG MKTAG('S', 'E', 'A', 'D')
00031 #define SNDC_TAG MKTAG('S', 'N', 'D', 'C')
00032 #define SEND_TAG MKTAG('S', 'E', 'N', 'D')
00033 #define ISNh_TAG MKTAG('1', 'S', 'N', 'h')
00034 #define EACS_TAG MKTAG('E', 'A', 'C', 'S')
00035 #define ISNd_TAG MKTAG('1', 'S', 'N', 'd')
00036 #define ISNe_TAG MKTAG('1', 'S', 'N', 'e')
00037 #define PT00_TAG MKTAG('P', 'T', 0x0, 0x0)
00038 #define GSTR_TAG MKTAG('G', 'S', 'T', 'R')
00039 #define SCDl_TAG MKTAG('S', 'C', 'D', 'l')
00040 #define SCEl_TAG MKTAG('S', 'C', 'E', 'l')
00041 #define kVGT_TAG MKTAG('k', 'V', 'G', 'T')
00042 #define MADk_TAG MKTAG('M', 'A', 'D', 'k')
00043 #define MPCh_TAG MKTAG('M', 'P', 'C', 'h')
00044 #define MVhd_TAG MKTAG('M', 'V', 'h', 'd')
00045 #define MV0K_TAG MKTAG('M', 'V', '0', 'K')
00046 #define MV0F_TAG MKTAG('M', 'V', '0', 'F')
00047 #define MVIh_TAG MKTAG('M', 'V', 'I', 'h')
00048
00049 typedef struct EaDemuxContext {
00050 int big_endian;
00051
00052 int video_codec;
00053 AVRational time_base;
00054 int video_stream_index;
00055
00056 int audio_codec;
00057 int audio_stream_index;
00058 int audio_frame_counter;
00059
00060 int64_t audio_pts;
00061
00062 int bytes;
00063 int sample_rate;
00064 int num_channels;
00065 int num_samples;
00066 } EaDemuxContext;
00067
00068 static uint32_t read_arbitary(ByteIOContext *pb) {
00069 uint8_t size, byte;
00070 int i;
00071 uint32_t word;
00072
00073 size = get_byte(pb);
00074
00075 word = 0;
00076 for (i = 0; i < size; i++) {
00077 byte = get_byte(pb);
00078 word <<= 8;
00079 word |= byte;
00080 }
00081
00082 return word;
00083 }
00084
00085
00086
00087
00088
00089 static int process_audio_header_elements(AVFormatContext *s)
00090 {
00091 int inHeader = 1;
00092 EaDemuxContext *ea = s->priv_data;
00093 ByteIOContext *pb = s->pb;
00094 int compression_type = -1, revision = -1, revision2 = -1;
00095
00096 ea->bytes = 2;
00097 ea->sample_rate = -1;
00098 ea->num_channels = 1;
00099
00100 while (inHeader) {
00101 int inSubheader;
00102 uint8_t byte;
00103 byte = get_byte(pb);
00104
00105 switch (byte) {
00106 case 0xFD:
00107 av_log (s, AV_LOG_INFO, "entered audio subheader\n");
00108 inSubheader = 1;
00109 while (inSubheader) {
00110 uint8_t subbyte;
00111 subbyte = get_byte(pb);
00112
00113 switch (subbyte) {
00114 case 0x80:
00115 revision = read_arbitary(pb);
00116 av_log (s, AV_LOG_INFO, "revision (element 0x80) set to 0x%08x\n", revision);
00117 break;
00118 case 0x82:
00119 ea->num_channels = read_arbitary(pb);
00120 av_log (s, AV_LOG_INFO, "num_channels (element 0x82) set to 0x%08x\n", ea->num_channels);
00121 break;
00122 case 0x83:
00123 compression_type = read_arbitary(pb);
00124 av_log (s, AV_LOG_INFO, "compression_type (element 0x83) set to 0x%08x\n", compression_type);
00125 break;
00126 case 0x84:
00127 ea->sample_rate = read_arbitary(pb);
00128 av_log (s, AV_LOG_INFO, "sample_rate (element 0x84) set to %i\n", ea->sample_rate);
00129 break;
00130 case 0x85:
00131 ea->num_samples = read_arbitary(pb);
00132 av_log (s, AV_LOG_INFO, "num_samples (element 0x85) set to 0x%08x\n", ea->num_samples);
00133 break;
00134 case 0x8A:
00135 av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
00136 av_log (s, AV_LOG_INFO, "exited audio subheader\n");
00137 inSubheader = 0;
00138 break;
00139 case 0xA0:
00140 revision2 = read_arbitary(pb);
00141 av_log (s, AV_LOG_INFO, "revision2 (element 0xA0) set to 0x%08x\n", revision2);
00142 break;
00143 case 0xFF:
00144 av_log (s, AV_LOG_INFO, "end of header block reached (within audio subheader)\n");
00145 inSubheader = 0;
00146 inHeader = 0;
00147 break;
00148 default:
00149 av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
00150 break;
00151 }
00152 }
00153 break;
00154 case 0xFF:
00155 av_log (s, AV_LOG_INFO, "end of header block reached\n");
00156 inHeader = 0;
00157 break;
00158 default:
00159 av_log (s, AV_LOG_INFO, "header element 0x%02x set to 0x%08x\n", byte, read_arbitary(pb));
00160 break;
00161 }
00162 }
00163
00164 switch (compression_type) {
00165 case 0: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
00166 case 7: ea->audio_codec = CODEC_ID_ADPCM_EA; break;
00167 case -1:
00168 switch (revision) {
00169 case 1: ea->audio_codec = CODEC_ID_ADPCM_EA_R1; break;
00170 case 2: ea->audio_codec = CODEC_ID_ADPCM_EA_R2; break;
00171 case 3: ea->audio_codec = CODEC_ID_ADPCM_EA_R3; break;
00172 case -1: break;
00173 default:
00174 av_log(s, AV_LOG_ERROR, "unsupported stream type; revision=%i\n", revision);
00175 return 0;
00176 }
00177 switch (revision2) {
00178 case 8: ea->audio_codec = CODEC_ID_PCM_S16LE_PLANAR; break;
00179 default:
00180 av_log(s, AV_LOG_ERROR, "unsupported stream type; revision2=%i\n", revision2);
00181 return 0;
00182 }
00183 break;
00184 default:
00185 av_log(s, AV_LOG_ERROR, "unsupported stream type; compression_type=%i\n", compression_type);
00186 return 0;
00187 }
00188
00189 if (ea->sample_rate == -1)
00190 ea->sample_rate = revision==3 ? 48000 : 22050;
00191
00192 return 1;
00193 }
00194
00195
00196
00197
00198
00199 static int process_audio_header_eacs(AVFormatContext *s)
00200 {
00201 EaDemuxContext *ea = s->priv_data;
00202 ByteIOContext *pb = s->pb;
00203 int compression_type;
00204
00205 ea->sample_rate = ea->big_endian ? get_be32(pb) : get_le32(pb);
00206 ea->bytes = get_byte(pb);
00207 ea->num_channels = get_byte(pb);
00208 compression_type = get_byte(pb);
00209 url_fskip(pb, 13);
00210
00211 switch (compression_type) {
00212 case 0:
00213 switch (ea->bytes) {
00214 case 1: ea->audio_codec = CODEC_ID_PCM_S8; break;
00215 case 2: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
00216 }
00217 break;
00218 case 1: ea->audio_codec = CODEC_ID_PCM_MULAW; ea->bytes = 1; break;
00219 case 2: ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_EACS; break;
00220 default:
00221 av_log (s, AV_LOG_ERROR, "unsupported stream type; audio compression_type=%i\n", compression_type);
00222 }
00223
00224 return 1;
00225 }
00226
00227
00228
00229
00230
00231 static int process_audio_header_sead(AVFormatContext *s)
00232 {
00233 EaDemuxContext *ea = s->priv_data;
00234 ByteIOContext *pb = s->pb;
00235
00236 ea->sample_rate = get_le32(pb);
00237 ea->bytes = get_le32(pb);
00238 ea->num_channels = get_le32(pb);
00239 ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_SEAD;
00240
00241 return 1;
00242 }
00243
00244 static int process_video_header_vp6(AVFormatContext *s)
00245 {
00246 EaDemuxContext *ea = s->priv_data;
00247 ByteIOContext *pb = s->pb;
00248
00249 url_fskip(pb, 16);
00250 ea->time_base.den = get_le32(pb);
00251 ea->time_base.num = get_le32(pb);
00252 ea->video_codec = CODEC_ID_VP6;
00253
00254 return 1;
00255 }
00256
00257
00258
00259
00260
00261 static int process_ea_header(AVFormatContext *s) {
00262 uint32_t blockid, size = 0;
00263 EaDemuxContext *ea = s->priv_data;
00264 ByteIOContext *pb = s->pb;
00265 int i;
00266
00267 for (i=0; i<5 && (!ea->audio_codec || !ea->video_codec); i++) {
00268 unsigned int startpos = url_ftell(pb);
00269 int err = 0;
00270
00271 blockid = get_le32(pb);
00272 size = get_le32(pb);
00273 if (i == 0)
00274 ea->big_endian = size > 0x000FFFFF;
00275 if (ea->big_endian)
00276 size = bswap_32(size);
00277
00278 switch (blockid) {
00279 case ISNh_TAG:
00280 if (get_le32(pb) != EACS_TAG) {
00281 av_log (s, AV_LOG_ERROR, "unknown 1SNh headerid\n");
00282 return 0;
00283 }
00284 err = process_audio_header_eacs(s);
00285 break;
00286
00287 case SCHl_TAG :
00288 blockid = get_le32(pb);
00289 if (blockid == GSTR_TAG) {
00290 url_fskip(pb, 4);
00291 } else if (blockid != PT00_TAG) {
00292 av_log (s, AV_LOG_ERROR, "unknown SCHl headerid\n");
00293 return 0;
00294 }
00295 err = process_audio_header_elements(s);
00296 break;
00297
00298 case SEAD_TAG:
00299 err = process_audio_header_sead(s);
00300 break;
00301
00302 case MVhd_TAG :
00303 err = process_video_header_vp6(s);
00304 break;
00305 }
00306
00307 if (err < 0) {
00308 av_log(s, AV_LOG_ERROR, "error parsing header: %i\n", err);
00309 return err;
00310 }
00311
00312 url_fseek(pb, startpos + size, SEEK_SET);
00313 }
00314
00315 url_fseek(pb, 0, SEEK_SET);
00316
00317 return 1;
00318 }
00319
00320
00321 static int ea_probe(AVProbeData *p)
00322 {
00323 switch (AV_RL32(&p->buf[0])) {
00324 case ISNh_TAG:
00325 case SCHl_TAG:
00326 case SEAD_TAG:
00327 case kVGT_TAG:
00328 case MADk_TAG:
00329 case MPCh_TAG:
00330 case MVhd_TAG:
00331 case MVIh_TAG:
00332 return AVPROBE_SCORE_MAX;
00333 }
00334 return 0;
00335 }
00336
00337 static int ea_read_header(AVFormatContext *s,
00338 AVFormatParameters *ap)
00339 {
00340 EaDemuxContext *ea = s->priv_data;
00341 AVStream *st;
00342
00343 if (!process_ea_header(s))
00344 return AVERROR(EIO);
00345
00346 if (ea->video_codec) {
00347
00348 st = av_new_stream(s, 0);
00349 if (!st)
00350 return AVERROR(ENOMEM);
00351 ea->video_stream_index = st->index;
00352 st->codec->codec_type = CODEC_TYPE_VIDEO;
00353 st->codec->codec_id = ea->video_codec;
00354 st->codec->codec_tag = 0;
00355 st->codec->time_base = ea->time_base;
00356 }
00357
00358 if (ea->audio_codec) {
00359
00360 st = av_new_stream(s, 0);
00361 if (!st)
00362 return AVERROR(ENOMEM);
00363 av_set_pts_info(st, 33, 1, ea->sample_rate);
00364 st->codec->codec_type = CODEC_TYPE_AUDIO;
00365 st->codec->codec_id = ea->audio_codec;
00366 st->codec->codec_tag = 0;
00367 st->codec->channels = ea->num_channels;
00368 st->codec->sample_rate = ea->sample_rate;
00369 st->codec->bits_per_sample = ea->bytes * 8;
00370 st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
00371 st->codec->bits_per_sample / 4;
00372 st->codec->block_align = st->codec->channels*st->codec->bits_per_sample;
00373 ea->audio_stream_index = st->index;
00374 ea->audio_frame_counter = 0;
00375 }
00376
00377 return 1;
00378 }
00379
00380 static int ea_read_packet(AVFormatContext *s,
00381 AVPacket *pkt)
00382 {
00383 EaDemuxContext *ea = s->priv_data;
00384 ByteIOContext *pb = s->pb;
00385 int ret = 0;
00386 int packet_read = 0;
00387 unsigned int chunk_type, chunk_size;
00388 int key = 0;
00389
00390 while (!packet_read) {
00391 chunk_type = get_le32(pb);
00392 chunk_size = (ea->big_endian ? get_be32(pb) : get_le32(pb)) - 8;
00393
00394 switch (chunk_type) {
00395
00396 case ISNh_TAG:
00397
00398 url_fskip(pb, 32);
00399 chunk_size -= 32;
00400 case ISNd_TAG:
00401 case SCDl_TAG:
00402 case SNDC_TAG:
00403 if (!ea->audio_codec) {
00404 url_fskip(pb, chunk_size);
00405 break;
00406 } else if (ea->audio_codec == CODEC_ID_PCM_S16LE_PLANAR) {
00407 url_fskip(pb, 12);
00408 chunk_size -= 12;
00409 }
00410 ret = av_get_packet(pb, pkt, chunk_size);
00411 if (ret != chunk_size)
00412 ret = AVERROR(EIO);
00413 else {
00414 pkt->stream_index = ea->audio_stream_index;
00415 pkt->pts = 90000;
00416 pkt->pts *= ea->audio_frame_counter;
00417 pkt->pts /= ea->sample_rate;
00418
00419 switch (ea->audio_codec) {
00420 case CODEC_ID_ADPCM_EA:
00421
00422
00423 ea->audio_frame_counter += ((chunk_size - 12) * 2) /
00424 ea->num_channels;
00425 break;
00426 default:
00427 ea->audio_frame_counter += chunk_size /
00428 (ea->bytes * ea->num_channels);
00429 }
00430 }
00431
00432 packet_read = 1;
00433 break;
00434
00435
00436 case 0:
00437 case ISNe_TAG:
00438 case SCEl_TAG:
00439 case SEND_TAG:
00440 ret = AVERROR(EIO);
00441 packet_read = 1;
00442 break;
00443
00444 case MV0K_TAG:
00445 key = PKT_FLAG_KEY;
00446 case MV0F_TAG:
00447 ret = av_get_packet(pb, pkt, chunk_size);
00448 if (ret != chunk_size)
00449 ret = AVERROR_IO;
00450 else {
00451 pkt->stream_index = ea->video_stream_index;
00452 pkt->flags |= key;
00453 }
00454 packet_read = 1;
00455 break;
00456
00457 default:
00458 url_fseek(pb, chunk_size, SEEK_CUR);
00459 break;
00460 }
00461 }
00462
00463 return ret;
00464 }
00465
00466 AVInputFormat ea_demuxer = {
00467 "ea",
00468 "Electronic Arts Multimedia Format",
00469 sizeof(EaDemuxContext),
00470 ea_probe,
00471 ea_read_header,
00472 ea_read_packet,
00473 };