1 /* Electronic Arts Multimedia File Demuxer
2 * Copyright (c) 2004 The ffmpeg Project
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 * @file electronicarts.c
23 * Electronic Arts Multimedia file demuxer (WVE/UV2/etc.)
24 * by Robin Kay (komadori at gekkou.co.uk)
29 #define SCHl_TAG MKTAG('S', 'C', 'H', 'l')
30 #define SEAD_TAG MKTAG('S', 'E', 'A', 'D') /* Sxxx header */
31 #define SNDC_TAG MKTAG('S', 'N', 'D', 'C') /* Sxxx data */
32 #define SEND_TAG MKTAG('S', 'E', 'N', 'D') /* Sxxx end */
33 #define ISNh_TAG MKTAG('1', 'S', 'N', 'h') /* 1SNx header */
34 #define EACS_TAG MKTAG('E', 'A', 'C', 'S')
35 #define ISNd_TAG MKTAG('1', 'S', 'N', 'd') /* 1SNx data */
36 #define ISNe_TAG MKTAG('1', 'S', 'N', 'e') /* 1SNx end */
37 #define PT00_TAG MKTAG('P', 'T', 0x0, 0x0)
38 #define GSTR_TAG MKTAG('G', 'S', 'T', 'R')
39 #define SCDl_TAG MKTAG('S', 'C', 'D', 'l')
40 #define SCEl_TAG MKTAG('S', 'C', 'E', 'l')
41 #define kVGT_TAG MKTAG('k', 'V', 'G', 'T') /* TGV i-frame */
42 #define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD i-frame */
43 #define MPCh_TAG MKTAG('M', 'P', 'C', 'h') /* MPEG2 */
44 #define MVhd_TAG MKTAG('M', 'V', 'h', 'd')
45 #define MV0K_TAG MKTAG('M', 'V', '0', 'K')
46 #define MV0F_TAG MKTAG('M', 'V', '0', 'F')
47 #define MVIh_TAG MKTAG('M', 'V', 'I', 'h') /* CMV header */
49 typedef struct EaDemuxContext {
54 int video_stream_index;
57 int audio_stream_index;
58 int audio_frame_counter;
68 static uint32_t read_arbitary(ByteIOContext *pb) {
76 for (i = 0; i < size; i++) {
86 * Process PT/GSTR sound header
87 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
89 static int process_audio_header_elements(AVFormatContext *s)
92 EaDemuxContext *ea = s->priv_data;
93 ByteIOContext *pb = s->pb;
94 int compression_type = -1, revision = -1, revision2 = -1;
107 av_log (s, AV_LOG_INFO, "entered audio subheader\n");
109 while (inSubheader) {
111 subbyte = get_byte(pb);
115 revision = read_arbitary(pb);
116 av_log (s, AV_LOG_INFO, "revision (element 0x80) set to 0x%08x\n", revision);
119 ea->num_channels = read_arbitary(pb);
120 av_log (s, AV_LOG_INFO, "num_channels (element 0x82) set to 0x%08x\n", ea->num_channels);
123 compression_type = read_arbitary(pb);
124 av_log (s, AV_LOG_INFO, "compression_type (element 0x83) set to 0x%08x\n", compression_type);
127 ea->sample_rate = read_arbitary(pb);
128 av_log (s, AV_LOG_INFO, "sample_rate (element 0x84) set to %i\n", ea->sample_rate);
131 ea->num_samples = read_arbitary(pb);
132 av_log (s, AV_LOG_INFO, "num_samples (element 0x85) set to 0x%08x\n", ea->num_samples);
135 av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
136 av_log (s, AV_LOG_INFO, "exited audio subheader\n");
140 revision2 = read_arbitary(pb);
141 av_log (s, AV_LOG_INFO, "revision2 (element 0xA0) set to 0x%08x\n", revision2);
144 av_log (s, AV_LOG_INFO, "end of header block reached (within audio subheader)\n");
149 av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
155 av_log (s, AV_LOG_INFO, "end of header block reached\n");
159 av_log (s, AV_LOG_INFO, "header element 0x%02x set to 0x%08x\n", byte, read_arbitary(pb));
164 switch (compression_type) {
165 case 0: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
166 case 7: ea->audio_codec = CODEC_ID_ADPCM_EA; break;
169 case 1: ea->audio_codec = CODEC_ID_ADPCM_EA_R1; break;
170 case 2: ea->audio_codec = CODEC_ID_ADPCM_EA_R2; break;
171 case 3: ea->audio_codec = CODEC_ID_ADPCM_EA_R3; break;
174 av_log(s, AV_LOG_ERROR, "unsupported stream type; revision=%i\n", revision);
178 case 8: ea->audio_codec = CODEC_ID_PCM_S16LE_PLANAR; break;
180 av_log(s, AV_LOG_ERROR, "unsupported stream type; revision2=%i\n", revision2);
185 av_log(s, AV_LOG_ERROR, "unsupported stream type; compression_type=%i\n", compression_type);
189 if (ea->sample_rate == -1)
190 ea->sample_rate = revision==3 ? 48000 : 22050;
196 * Process EACS sound header
197 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
199 static int process_audio_header_eacs(AVFormatContext *s)
201 EaDemuxContext *ea = s->priv_data;
202 ByteIOContext *pb = s->pb;
203 int compression_type;
205 ea->sample_rate = ea->big_endian ? get_be32(pb) : get_le32(pb);
206 ea->bytes = get_byte(pb); /* 1=8-bit, 2=16-bit */
207 ea->num_channels = get_byte(pb);
208 compression_type = get_byte(pb);
211 switch (compression_type) {
214 case 1: ea->audio_codec = CODEC_ID_PCM_S8; break;
215 case 2: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
218 case 1: ea->audio_codec = CODEC_ID_PCM_MULAW; ea->bytes = 1; break;
219 case 2: ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_EACS; break;
221 av_log (s, AV_LOG_ERROR, "unsupported stream type; audio compression_type=%i\n", compression_type);
228 * Process SEAD sound header
229 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
231 static int process_audio_header_sead(AVFormatContext *s)
233 EaDemuxContext *ea = s->priv_data;
234 ByteIOContext *pb = s->pb;
236 ea->sample_rate = get_le32(pb);
237 ea->bytes = get_le32(pb); /* 1=8-bit, 2=16-bit */
238 ea->num_channels = get_le32(pb);
239 ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_SEAD;
244 static int process_video_header_vp6(AVFormatContext *s)
246 EaDemuxContext *ea = s->priv_data;
247 ByteIOContext *pb = s->pb;
250 ea->time_base.den = get_le32(pb);
251 ea->time_base.num = get_le32(pb);
252 ea->video_codec = CODEC_ID_VP6;
258 * Process EA file header
259 * Returns 1 if the EA file is valid and successfully opened, 0 otherwise
261 static int process_ea_header(AVFormatContext *s) {
262 uint32_t blockid, size = 0;
263 EaDemuxContext *ea = s->priv_data;
264 ByteIOContext *pb = s->pb;
267 for (i=0; i<5 && (!ea->audio_codec || !ea->video_codec); i++) {
268 unsigned int startpos = url_ftell(pb);
271 blockid = get_le32(pb);
274 ea->big_endian = size > 0x000FFFFF;
276 size = bswap_32(size);
280 if (get_le32(pb) != EACS_TAG) {
281 av_log (s, AV_LOG_ERROR, "unknown 1SNh headerid\n");
284 err = process_audio_header_eacs(s);
288 blockid = get_le32(pb);
289 if (blockid == GSTR_TAG) {
291 } else if (blockid != PT00_TAG) {
292 av_log (s, AV_LOG_ERROR, "unknown SCHl headerid\n");
295 err = process_audio_header_elements(s);
299 err = process_audio_header_sead(s);
303 err = process_video_header_vp6(s);
308 av_log(s, AV_LOG_ERROR, "error parsing header: %i\n", err);
312 url_fseek(pb, startpos + size, SEEK_SET);
315 url_fseek(pb, 0, SEEK_SET);
321 static int ea_probe(AVProbeData *p)
323 switch (AV_RL32(&p->buf[0])) {
332 return AVPROBE_SCORE_MAX;
337 static int ea_read_header(AVFormatContext *s,
338 AVFormatParameters *ap)
340 EaDemuxContext *ea = s->priv_data;
343 if (!process_ea_header(s))
346 if (ea->video_codec) {
347 /* initialize the video decoder stream */
348 st = av_new_stream(s, 0);
350 return AVERROR(ENOMEM);
351 ea->video_stream_index = st->index;
352 st->codec->codec_type = CODEC_TYPE_VIDEO;
353 st->codec->codec_id = ea->video_codec;
354 st->codec->codec_tag = 0; /* no fourcc */
355 st->codec->time_base = ea->time_base;
358 if (ea->audio_codec) {
359 /* initialize the audio decoder stream */
360 st = av_new_stream(s, 0);
362 return AVERROR(ENOMEM);
363 av_set_pts_info(st, 33, 1, ea->sample_rate);
364 st->codec->codec_type = CODEC_TYPE_AUDIO;
365 st->codec->codec_id = ea->audio_codec;
366 st->codec->codec_tag = 0; /* no tag */
367 st->codec->channels = ea->num_channels;
368 st->codec->sample_rate = ea->sample_rate;
369 st->codec->bits_per_sample = ea->bytes * 8;
370 st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
371 st->codec->bits_per_sample / 4;
372 st->codec->block_align = st->codec->channels*st->codec->bits_per_sample;
373 ea->audio_stream_index = st->index;
374 ea->audio_frame_counter = 0;
380 static int ea_read_packet(AVFormatContext *s,
383 EaDemuxContext *ea = s->priv_data;
384 ByteIOContext *pb = s->pb;
387 unsigned int chunk_type, chunk_size;
390 while (!packet_read) {
391 chunk_type = get_le32(pb);
392 chunk_size = (ea->big_endian ? get_be32(pb) : get_le32(pb)) - 8;
394 switch (chunk_type) {
397 /* header chunk also contains data; skip over the header portion*/
403 if (!ea->audio_codec) {
404 url_fskip(pb, chunk_size);
406 } else if (ea->audio_codec == CODEC_ID_PCM_S16LE_PLANAR) {
407 url_fskip(pb, 12); /* planar header */
410 ret = av_get_packet(pb, pkt, chunk_size);
411 if (ret != chunk_size)
414 pkt->stream_index = ea->audio_stream_index;
416 pkt->pts *= ea->audio_frame_counter;
417 pkt->pts /= ea->sample_rate;
419 switch (ea->audio_codec) {
420 case CODEC_ID_ADPCM_EA:
421 /* 2 samples/byte, 1 or 2 samples per frame depending
422 * on stereo; chunk also has 12-byte header */
423 ea->audio_frame_counter += ((chunk_size - 12) * 2) /
427 ea->audio_frame_counter += chunk_size /
428 (ea->bytes * ea->num_channels);
447 ret = av_get_packet(pb, pkt, chunk_size);
448 if (ret != chunk_size)
451 pkt->stream_index = ea->video_stream_index;
458 url_fseek(pb, chunk_size, SEEK_CUR);
466 AVInputFormat ea_demuxer = {
468 "Electronic Arts Multimedia Format",
469 sizeof(EaDemuxContext),