1 /* Electronic Arts Multimedia File Demuxer
2 * Copyright (c) 2004 The ffmpeg Project
3 * Copyright (c) 2006-2008 Peter Ross
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * @file electronicarts.c
24 * Electronic Arts Multimedia file demuxer (WVE/UV2/etc.)
25 * by Robin Kay (komadori at gekkou.co.uk)
30 #define SCHl_TAG MKTAG('S', 'C', 'H', 'l')
31 #define SEAD_TAG MKTAG('S', 'E', 'A', 'D') /* Sxxx header */
32 #define SNDC_TAG MKTAG('S', 'N', 'D', 'C') /* Sxxx data */
33 #define SEND_TAG MKTAG('S', 'E', 'N', 'D') /* Sxxx end */
34 #define ISNh_TAG MKTAG('1', 'S', 'N', 'h') /* 1SNx header */
35 #define EACS_TAG MKTAG('E', 'A', 'C', 'S')
36 #define ISNd_TAG MKTAG('1', 'S', 'N', 'd') /* 1SNx data */
37 #define ISNe_TAG MKTAG('1', 'S', 'N', 'e') /* 1SNx end */
38 #define PT00_TAG MKTAG('P', 'T', 0x0, 0x0)
39 #define GSTR_TAG MKTAG('G', 'S', 'T', 'R')
40 #define SCDl_TAG MKTAG('S', 'C', 'D', 'l')
41 #define SCEl_TAG MKTAG('S', 'C', 'E', 'l')
42 #define kVGT_TAG MKTAG('k', 'V', 'G', 'T') /* TGV i-frame */
43 #define fVGT_TAG MKTAG('f', 'V', 'G', 'T') /* TGV p-frame */
44 #define mTCD_TAG MKTAG('m', 'T', 'C', 'D') /* MDEC */
45 #define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD i-frame */
46 #define MPCh_TAG MKTAG('M', 'P', 'C', 'h') /* MPEG2 */
47 #define MVhd_TAG MKTAG('M', 'V', 'h', 'd')
48 #define MV0K_TAG MKTAG('M', 'V', '0', 'K')
49 #define MV0F_TAG MKTAG('M', 'V', '0', 'F')
50 #define MVIh_TAG MKTAG('M', 'V', 'I', 'h') /* CMV header */
51 #define MVIf_TAG MKTAG('M', 'V', 'I', 'f') /* CMV i-frame */
53 typedef struct EaDemuxContext {
56 enum CodecID video_codec;
59 int video_stream_index;
61 enum CodecID audio_codec;
62 int audio_stream_index;
63 int audio_frame_counter;
73 static uint32_t read_arbitary(ByteIOContext *pb) {
81 for (i = 0; i < size; i++) {
91 * Process PT/GSTR sound header
92 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
94 static int process_audio_header_elements(AVFormatContext *s)
97 EaDemuxContext *ea = s->priv_data;
98 ByteIOContext *pb = s->pb;
99 int compression_type = -1, revision = -1, revision2 = -1;
102 ea->sample_rate = -1;
103 ea->num_channels = 1;
112 av_log (s, AV_LOG_INFO, "entered audio subheader\n");
114 while (inSubheader) {
116 subbyte = get_byte(pb);
120 revision = read_arbitary(pb);
121 av_log (s, AV_LOG_INFO, "revision (element 0x80) set to 0x%08x\n", revision);
124 ea->num_channels = read_arbitary(pb);
125 av_log (s, AV_LOG_INFO, "num_channels (element 0x82) set to 0x%08x\n", ea->num_channels);
128 compression_type = read_arbitary(pb);
129 av_log (s, AV_LOG_INFO, "compression_type (element 0x83) set to 0x%08x\n", compression_type);
132 ea->sample_rate = read_arbitary(pb);
133 av_log (s, AV_LOG_INFO, "sample_rate (element 0x84) set to %i\n", ea->sample_rate);
136 ea->num_samples = read_arbitary(pb);
137 av_log (s, AV_LOG_INFO, "num_samples (element 0x85) set to 0x%08x\n", ea->num_samples);
140 av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
141 av_log (s, AV_LOG_INFO, "exited audio subheader\n");
145 revision2 = read_arbitary(pb);
146 av_log (s, AV_LOG_INFO, "revision2 (element 0xA0) set to 0x%08x\n", revision2);
149 av_log (s, AV_LOG_INFO, "end of header block reached (within audio subheader)\n");
154 av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
160 av_log (s, AV_LOG_INFO, "end of header block reached\n");
164 av_log (s, AV_LOG_INFO, "header element 0x%02x set to 0x%08x\n", byte, read_arbitary(pb));
169 switch (compression_type) {
170 case 0: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
171 case 7: ea->audio_codec = CODEC_ID_ADPCM_EA; break;
174 case 1: ea->audio_codec = CODEC_ID_ADPCM_EA_R1; break;
175 case 2: ea->audio_codec = CODEC_ID_ADPCM_EA_R2; break;
176 case 3: ea->audio_codec = CODEC_ID_ADPCM_EA_R3; break;
179 av_log(s, AV_LOG_ERROR, "unsupported stream type; revision=%i\n", revision);
183 case 8: ea->audio_codec = CODEC_ID_PCM_S16LE_PLANAR; break;
186 av_log(s, AV_LOG_ERROR, "unsupported stream type; revision2=%i\n", revision2);
191 av_log(s, AV_LOG_ERROR, "unsupported stream type; compression_type=%i\n", compression_type);
195 if (ea->sample_rate == -1)
196 ea->sample_rate = revision==3 ? 48000 : 22050;
202 * Process EACS sound header
203 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
205 static int process_audio_header_eacs(AVFormatContext *s)
207 EaDemuxContext *ea = s->priv_data;
208 ByteIOContext *pb = s->pb;
209 int compression_type;
211 ea->sample_rate = ea->big_endian ? get_be32(pb) : get_le32(pb);
212 ea->bytes = get_byte(pb); /* 1=8-bit, 2=16-bit */
213 ea->num_channels = get_byte(pb);
214 compression_type = get_byte(pb);
217 switch (compression_type) {
220 case 1: ea->audio_codec = CODEC_ID_PCM_S8; break;
221 case 2: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
224 case 1: ea->audio_codec = CODEC_ID_PCM_MULAW; ea->bytes = 1; break;
225 case 2: ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_EACS; break;
227 av_log (s, AV_LOG_ERROR, "unsupported stream type; audio compression_type=%i\n", compression_type);
234 * Process SEAD sound header
235 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
237 static int process_audio_header_sead(AVFormatContext *s)
239 EaDemuxContext *ea = s->priv_data;
240 ByteIOContext *pb = s->pb;
242 ea->sample_rate = get_le32(pb);
243 ea->bytes = get_le32(pb); /* 1=8-bit, 2=16-bit */
244 ea->num_channels = get_le32(pb);
245 ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_SEAD;
250 static int process_video_header_mdec(AVFormatContext *s)
252 EaDemuxContext *ea = s->priv_data;
253 ByteIOContext *pb = s->pb;
255 ea->width = get_le16(pb);
256 ea->height = get_le16(pb);
257 ea->time_base = (AVRational){1,15};
258 ea->video_codec = CODEC_ID_MDEC;
262 static int process_video_header_vp6(AVFormatContext *s)
264 EaDemuxContext *ea = s->priv_data;
265 ByteIOContext *pb = s->pb;
268 ea->time_base.den = get_le32(pb);
269 ea->time_base.num = get_le32(pb);
270 ea->video_codec = CODEC_ID_VP6;
276 * Process EA file header
277 * Returns 1 if the EA file is valid and successfully opened, 0 otherwise
279 static int process_ea_header(AVFormatContext *s) {
280 uint32_t blockid, size = 0;
281 EaDemuxContext *ea = s->priv_data;
282 ByteIOContext *pb = s->pb;
285 for (i=0; i<5 && (!ea->audio_codec || !ea->video_codec); i++) {
286 unsigned int startpos = url_ftell(pb);
289 blockid = get_le32(pb);
292 ea->big_endian = size > 0x000FFFFF;
294 size = bswap_32(size);
298 if (get_le32(pb) != EACS_TAG) {
299 av_log (s, AV_LOG_ERROR, "unknown 1SNh headerid\n");
302 err = process_audio_header_eacs(s);
306 blockid = get_le32(pb);
307 if (blockid == GSTR_TAG) {
309 } else if (blockid != PT00_TAG) {
310 av_log (s, AV_LOG_ERROR, "unknown SCHl headerid\n");
313 err = process_audio_header_elements(s);
317 err = process_audio_header_sead(s);
321 ea->video_codec = CODEC_ID_CMV;
322 ea->time_base = (AVRational){0,0};
326 ea->video_codec = CODEC_ID_TGV;
327 ea->time_base = (AVRational){0,0};
331 err = process_video_header_mdec(s);
335 err = process_video_header_vp6(s);
340 av_log(s, AV_LOG_ERROR, "error parsing header: %i\n", err);
344 url_fseek(pb, startpos + size, SEEK_SET);
347 url_fseek(pb, 0, SEEK_SET);
353 static int ea_probe(AVProbeData *p)
355 switch (AV_RL32(&p->buf[0])) {
364 return AVPROBE_SCORE_MAX;
369 static int ea_read_header(AVFormatContext *s,
370 AVFormatParameters *ap)
372 EaDemuxContext *ea = s->priv_data;
375 if (!process_ea_header(s))
378 if (ea->video_codec) {
379 /* initialize the video decoder stream */
380 st = av_new_stream(s, 0);
382 return AVERROR(ENOMEM);
383 ea->video_stream_index = st->index;
384 st->codec->codec_type = CODEC_TYPE_VIDEO;
385 st->codec->codec_id = ea->video_codec;
386 st->codec->codec_tag = 0; /* no fourcc */
387 st->codec->time_base = ea->time_base;
388 st->codec->width = ea->width;
389 st->codec->height = ea->height;
392 if (ea->audio_codec) {
393 /* initialize the audio decoder stream */
394 st = av_new_stream(s, 0);
396 return AVERROR(ENOMEM);
397 av_set_pts_info(st, 33, 1, ea->sample_rate);
398 st->codec->codec_type = CODEC_TYPE_AUDIO;
399 st->codec->codec_id = ea->audio_codec;
400 st->codec->codec_tag = 0; /* no tag */
401 st->codec->channels = ea->num_channels;
402 st->codec->sample_rate = ea->sample_rate;
403 st->codec->bits_per_sample = ea->bytes * 8;
404 st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
405 st->codec->bits_per_sample / 4;
406 st->codec->block_align = st->codec->channels*st->codec->bits_per_sample;
407 ea->audio_stream_index = st->index;
408 ea->audio_frame_counter = 0;
414 static int ea_read_packet(AVFormatContext *s,
417 EaDemuxContext *ea = s->priv_data;
418 ByteIOContext *pb = s->pb;
421 unsigned int chunk_type, chunk_size;
424 while (!packet_read) {
425 chunk_type = get_le32(pb);
426 chunk_size = (ea->big_endian ? get_be32(pb) : get_le32(pb)) - 8;
428 switch (chunk_type) {
431 /* header chunk also contains data; skip over the header portion*/
437 if (!ea->audio_codec) {
438 url_fskip(pb, chunk_size);
440 } else if (ea->audio_codec == CODEC_ID_PCM_S16LE_PLANAR) {
441 url_fskip(pb, 12); /* planar header */
444 ret = av_get_packet(pb, pkt, chunk_size);
445 if (ret != chunk_size)
448 pkt->stream_index = ea->audio_stream_index;
450 pkt->pts *= ea->audio_frame_counter;
451 pkt->pts /= ea->sample_rate;
453 switch (ea->audio_codec) {
454 case CODEC_ID_ADPCM_EA:
455 /* 2 samples/byte, 1 or 2 samples per frame depending
456 * on stereo; chunk also has 12-byte header */
457 ea->audio_frame_counter += ((chunk_size - 12) * 2) /
461 ea->audio_frame_counter += chunk_size /
462 (ea->bytes * ea->num_channels);
483 url_fseek(pb, -8, SEEK_CUR); // include chunk preamble
485 goto get_video_packet;
488 url_fseek(pb, 8, SEEK_CUR); // skip ea dct header
490 goto get_video_packet;
496 ret = av_get_packet(pb, pkt, chunk_size);
497 if (ret != chunk_size)
500 pkt->stream_index = ea->video_stream_index;
507 url_fseek(pb, chunk_size, SEEK_CUR);
515 AVInputFormat ea_demuxer = {
517 NULL_IF_CONFIG_SMALL("Electronic Arts Multimedia Format"),
518 sizeof(EaDemuxContext),