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 MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD i-frame */
44 #define MPCh_TAG MKTAG('M', 'P', 'C', 'h') /* MPEG2 */
45 #define MVhd_TAG MKTAG('M', 'V', 'h', 'd')
46 #define MV0K_TAG MKTAG('M', 'V', '0', 'K')
47 #define MV0F_TAG MKTAG('M', 'V', '0', 'F')
48 #define MVIh_TAG MKTAG('M', 'V', 'I', 'h') /* CMV header */
49 #define MVIf_TAG MKTAG('M', 'V', 'I', 'f') /* CMV i-frame */
51 typedef struct EaDemuxContext {
54 enum CodecID video_codec;
56 int video_stream_index;
58 enum CodecID audio_codec;
59 int audio_stream_index;
60 int audio_frame_counter;
70 static uint32_t read_arbitary(ByteIOContext *pb) {
78 for (i = 0; i < size; i++) {
88 * Process PT/GSTR sound header
89 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
91 static int process_audio_header_elements(AVFormatContext *s)
94 EaDemuxContext *ea = s->priv_data;
95 ByteIOContext *pb = s->pb;
96 int compression_type = -1, revision = -1, revision2 = -1;
100 ea->num_channels = 1;
109 av_log (s, AV_LOG_INFO, "entered audio subheader\n");
111 while (inSubheader) {
113 subbyte = get_byte(pb);
117 revision = read_arbitary(pb);
118 av_log (s, AV_LOG_INFO, "revision (element 0x80) set to 0x%08x\n", revision);
121 ea->num_channels = read_arbitary(pb);
122 av_log (s, AV_LOG_INFO, "num_channels (element 0x82) set to 0x%08x\n", ea->num_channels);
125 compression_type = read_arbitary(pb);
126 av_log (s, AV_LOG_INFO, "compression_type (element 0x83) set to 0x%08x\n", compression_type);
129 ea->sample_rate = read_arbitary(pb);
130 av_log (s, AV_LOG_INFO, "sample_rate (element 0x84) set to %i\n", ea->sample_rate);
133 ea->num_samples = read_arbitary(pb);
134 av_log (s, AV_LOG_INFO, "num_samples (element 0x85) set to 0x%08x\n", ea->num_samples);
137 av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
138 av_log (s, AV_LOG_INFO, "exited audio subheader\n");
142 revision2 = read_arbitary(pb);
143 av_log (s, AV_LOG_INFO, "revision2 (element 0xA0) set to 0x%08x\n", revision2);
146 av_log (s, AV_LOG_INFO, "end of header block reached (within audio subheader)\n");
151 av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
157 av_log (s, AV_LOG_INFO, "end of header block reached\n");
161 av_log (s, AV_LOG_INFO, "header element 0x%02x set to 0x%08x\n", byte, read_arbitary(pb));
166 switch (compression_type) {
167 case 0: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
168 case 7: ea->audio_codec = CODEC_ID_ADPCM_EA; break;
171 case 1: ea->audio_codec = CODEC_ID_ADPCM_EA_R1; break;
172 case 2: ea->audio_codec = CODEC_ID_ADPCM_EA_R2; break;
173 case 3: ea->audio_codec = CODEC_ID_ADPCM_EA_R3; break;
176 av_log(s, AV_LOG_ERROR, "unsupported stream type; revision=%i\n", revision);
180 case 8: ea->audio_codec = CODEC_ID_PCM_S16LE_PLANAR; break;
182 av_log(s, AV_LOG_ERROR, "unsupported stream type; revision2=%i\n", revision2);
187 av_log(s, AV_LOG_ERROR, "unsupported stream type; compression_type=%i\n", compression_type);
191 if (ea->sample_rate == -1)
192 ea->sample_rate = revision==3 ? 48000 : 22050;
198 * Process EACS sound header
199 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
201 static int process_audio_header_eacs(AVFormatContext *s)
203 EaDemuxContext *ea = s->priv_data;
204 ByteIOContext *pb = s->pb;
205 int compression_type;
207 ea->sample_rate = ea->big_endian ? get_be32(pb) : get_le32(pb);
208 ea->bytes = get_byte(pb); /* 1=8-bit, 2=16-bit */
209 ea->num_channels = get_byte(pb);
210 compression_type = get_byte(pb);
213 switch (compression_type) {
216 case 1: ea->audio_codec = CODEC_ID_PCM_S8; break;
217 case 2: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
220 case 1: ea->audio_codec = CODEC_ID_PCM_MULAW; ea->bytes = 1; break;
221 case 2: ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_EACS; break;
223 av_log (s, AV_LOG_ERROR, "unsupported stream type; audio compression_type=%i\n", compression_type);
230 * Process SEAD sound header
231 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
233 static int process_audio_header_sead(AVFormatContext *s)
235 EaDemuxContext *ea = s->priv_data;
236 ByteIOContext *pb = s->pb;
238 ea->sample_rate = get_le32(pb);
239 ea->bytes = get_le32(pb); /* 1=8-bit, 2=16-bit */
240 ea->num_channels = get_le32(pb);
241 ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_SEAD;
246 static int process_video_header_vp6(AVFormatContext *s)
248 EaDemuxContext *ea = s->priv_data;
249 ByteIOContext *pb = s->pb;
252 ea->time_base.den = get_le32(pb);
253 ea->time_base.num = get_le32(pb);
254 ea->video_codec = CODEC_ID_VP6;
260 * Process EA file header
261 * Returns 1 if the EA file is valid and successfully opened, 0 otherwise
263 static int process_ea_header(AVFormatContext *s) {
264 uint32_t blockid, size = 0;
265 EaDemuxContext *ea = s->priv_data;
266 ByteIOContext *pb = s->pb;
269 for (i=0; i<5 && (!ea->audio_codec || !ea->video_codec); i++) {
270 unsigned int startpos = url_ftell(pb);
273 blockid = get_le32(pb);
276 ea->big_endian = size > 0x000FFFFF;
278 size = bswap_32(size);
282 if (get_le32(pb) != EACS_TAG) {
283 av_log (s, AV_LOG_ERROR, "unknown 1SNh headerid\n");
286 err = process_audio_header_eacs(s);
290 blockid = get_le32(pb);
291 if (blockid == GSTR_TAG) {
293 } else if (blockid != PT00_TAG) {
294 av_log (s, AV_LOG_ERROR, "unknown SCHl headerid\n");
297 err = process_audio_header_elements(s);
301 err = process_audio_header_sead(s);
305 ea->video_codec = CODEC_ID_CMV;
306 ea->time_base = (AVRational){0,0};
310 err = process_video_header_vp6(s);
315 av_log(s, AV_LOG_ERROR, "error parsing header: %i\n", err);
319 url_fseek(pb, startpos + size, SEEK_SET);
322 url_fseek(pb, 0, SEEK_SET);
328 static int ea_probe(AVProbeData *p)
330 switch (AV_RL32(&p->buf[0])) {
339 return AVPROBE_SCORE_MAX;
344 static int ea_read_header(AVFormatContext *s,
345 AVFormatParameters *ap)
347 EaDemuxContext *ea = s->priv_data;
350 if (!process_ea_header(s))
353 if (ea->video_codec) {
354 /* initialize the video decoder stream */
355 st = av_new_stream(s, 0);
357 return AVERROR(ENOMEM);
358 ea->video_stream_index = st->index;
359 st->codec->codec_type = CODEC_TYPE_VIDEO;
360 st->codec->codec_id = ea->video_codec;
361 st->codec->codec_tag = 0; /* no fourcc */
362 st->codec->time_base = ea->time_base;
365 if (ea->audio_codec) {
366 /* initialize the audio decoder stream */
367 st = av_new_stream(s, 0);
369 return AVERROR(ENOMEM);
370 av_set_pts_info(st, 33, 1, ea->sample_rate);
371 st->codec->codec_type = CODEC_TYPE_AUDIO;
372 st->codec->codec_id = ea->audio_codec;
373 st->codec->codec_tag = 0; /* no tag */
374 st->codec->channels = ea->num_channels;
375 st->codec->sample_rate = ea->sample_rate;
376 st->codec->bits_per_sample = ea->bytes * 8;
377 st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
378 st->codec->bits_per_sample / 4;
379 st->codec->block_align = st->codec->channels*st->codec->bits_per_sample;
380 ea->audio_stream_index = st->index;
381 ea->audio_frame_counter = 0;
387 static int ea_read_packet(AVFormatContext *s,
390 EaDemuxContext *ea = s->priv_data;
391 ByteIOContext *pb = s->pb;
394 unsigned int chunk_type, chunk_size;
397 while (!packet_read) {
398 chunk_type = get_le32(pb);
399 chunk_size = (ea->big_endian ? get_be32(pb) : get_le32(pb)) - 8;
401 switch (chunk_type) {
404 /* header chunk also contains data; skip over the header portion*/
410 if (!ea->audio_codec) {
411 url_fskip(pb, chunk_size);
413 } else if (ea->audio_codec == CODEC_ID_PCM_S16LE_PLANAR) {
414 url_fskip(pb, 12); /* planar header */
417 ret = av_get_packet(pb, pkt, chunk_size);
418 if (ret != chunk_size)
421 pkt->stream_index = ea->audio_stream_index;
423 pkt->pts *= ea->audio_frame_counter;
424 pkt->pts /= ea->sample_rate;
426 switch (ea->audio_codec) {
427 case CODEC_ID_ADPCM_EA:
428 /* 2 samples/byte, 1 or 2 samples per frame depending
429 * on stereo; chunk also has 12-byte header */
430 ea->audio_frame_counter += ((chunk_size - 12) * 2) /
434 ea->audio_frame_counter += chunk_size /
435 (ea->bytes * ea->num_channels);
454 url_fseek(pb, -8, SEEK_CUR); // include chunk preamble
456 goto get_video_packet;
462 ret = av_get_packet(pb, pkt, chunk_size);
463 if (ret != chunk_size)
466 pkt->stream_index = ea->video_stream_index;
473 url_fseek(pb, chunk_size, SEEK_CUR);
481 AVInputFormat ea_demuxer = {
483 NULL_IF_CONFIG_SMALL("Electronic Arts Multimedia Format"),
484 sizeof(EaDemuxContext),