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00030 #include "libavutil/intreadwrite.h"
00031 #include "avformat.h"
00032 #include "internal.h"
00033
00034 #define FILM_TAG MKBETAG('F', 'I', 'L', 'M')
00035 #define FDSC_TAG MKBETAG('F', 'D', 'S', 'C')
00036 #define STAB_TAG MKBETAG('S', 'T', 'A', 'B')
00037 #define CVID_TAG MKBETAG('c', 'v', 'i', 'd')
00038 #define RAW_TAG MKBETAG('r', 'a', 'w', ' ')
00039
00040 typedef struct {
00041 int stream;
00042 int64_t sample_offset;
00043 unsigned int sample_size;
00044 int64_t pts;
00045 int keyframe;
00046 } film_sample;
00047
00048 typedef struct FilmDemuxContext {
00049 int video_stream_index;
00050 int audio_stream_index;
00051
00052 enum CodecID audio_type;
00053 unsigned int audio_samplerate;
00054 unsigned int audio_bits;
00055 unsigned int audio_channels;
00056
00057 enum CodecID video_type;
00058 unsigned int sample_count;
00059 film_sample *sample_table;
00060 unsigned int current_sample;
00061
00062 unsigned int base_clock;
00063 unsigned int version;
00064
00065
00066 unsigned char *stereo_buffer;
00067 int stereo_buffer_size;
00068 } FilmDemuxContext;
00069
00070 static int film_probe(AVProbeData *p)
00071 {
00072 if (AV_RB32(&p->buf[0]) != FILM_TAG)
00073 return 0;
00074
00075 return AVPROBE_SCORE_MAX;
00076 }
00077
00078 static int film_read_close(AVFormatContext *s)
00079 {
00080 FilmDemuxContext *film = s->priv_data;
00081
00082 av_freep(&film->sample_table);
00083 av_freep(&film->stereo_buffer);
00084
00085 return 0;
00086 }
00087
00088 static int film_read_header(AVFormatContext *s,
00089 AVFormatParameters *ap)
00090 {
00091 FilmDemuxContext *film = s->priv_data;
00092 AVIOContext *pb = s->pb;
00093 AVStream *st;
00094 unsigned char scratch[256];
00095 int i, ret;
00096 unsigned int data_offset;
00097 unsigned int audio_frame_counter;
00098
00099 film->sample_table = NULL;
00100 film->stereo_buffer = NULL;
00101 film->stereo_buffer_size = 0;
00102
00103
00104 if (avio_read(pb, scratch, 16) != 16)
00105 return AVERROR(EIO);
00106 data_offset = AV_RB32(&scratch[4]);
00107 film->version = AV_RB32(&scratch[8]);
00108
00109
00110 if (film->version == 0) {
00111
00112 if (avio_read(pb, scratch, 20) != 20)
00113 return AVERROR(EIO);
00114
00115 film->audio_type = CODEC_ID_PCM_S8;
00116 film->audio_samplerate = 22050;
00117 film->audio_channels = 1;
00118 film->audio_bits = 8;
00119 } else {
00120
00121 if (avio_read(pb, scratch, 32) != 32)
00122 return AVERROR(EIO);
00123 film->audio_samplerate = AV_RB16(&scratch[24]);
00124 film->audio_channels = scratch[21];
00125 if (!film->audio_channels || film->audio_channels > 2) {
00126 av_log(s, AV_LOG_ERROR,
00127 "Invalid number of channels: %d\n", film->audio_channels);
00128 return AVERROR_INVALIDDATA;
00129 }
00130 film->audio_bits = scratch[22];
00131 if (scratch[23] == 2)
00132 film->audio_type = CODEC_ID_ADPCM_ADX;
00133 else if (film->audio_channels > 0) {
00134 if (film->audio_bits == 8)
00135 film->audio_type = CODEC_ID_PCM_S8;
00136 else if (film->audio_bits == 16)
00137 film->audio_type = CODEC_ID_PCM_S16BE;
00138 else
00139 film->audio_type = CODEC_ID_NONE;
00140 } else
00141 film->audio_type = CODEC_ID_NONE;
00142 }
00143
00144 if (AV_RB32(&scratch[0]) != FDSC_TAG)
00145 return AVERROR_INVALIDDATA;
00146
00147 if (AV_RB32(&scratch[8]) == CVID_TAG) {
00148 film->video_type = CODEC_ID_CINEPAK;
00149 } else if (AV_RB32(&scratch[8]) == RAW_TAG) {
00150 film->video_type = CODEC_ID_RAWVIDEO;
00151 } else {
00152 film->video_type = CODEC_ID_NONE;
00153 }
00154
00155
00156 if (film->video_type) {
00157 st = avformat_new_stream(s, NULL);
00158 if (!st)
00159 return AVERROR(ENOMEM);
00160 film->video_stream_index = st->index;
00161 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00162 st->codec->codec_id = film->video_type;
00163 st->codec->codec_tag = 0;
00164 st->codec->width = AV_RB32(&scratch[16]);
00165 st->codec->height = AV_RB32(&scratch[12]);
00166
00167 if (film->video_type == CODEC_ID_RAWVIDEO) {
00168 if (scratch[20] == 24) {
00169 st->codec->pix_fmt = PIX_FMT_RGB24;
00170 } else {
00171 av_log(s, AV_LOG_ERROR, "raw video is using unhandled %dbpp\n", scratch[20]);
00172 return -1;
00173 }
00174 }
00175 }
00176
00177 if (film->audio_type) {
00178 st = avformat_new_stream(s, NULL);
00179 if (!st)
00180 return AVERROR(ENOMEM);
00181 film->audio_stream_index = st->index;
00182 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
00183 st->codec->codec_id = film->audio_type;
00184 st->codec->codec_tag = 1;
00185 st->codec->channels = film->audio_channels;
00186 st->codec->sample_rate = film->audio_samplerate;
00187
00188 if (film->audio_type == CODEC_ID_ADPCM_ADX) {
00189 st->codec->bits_per_coded_sample = 18 * 8 / 32;
00190 st->codec->block_align = st->codec->channels * 18;
00191 st->need_parsing = AVSTREAM_PARSE_FULL;
00192 } else {
00193 st->codec->bits_per_coded_sample = film->audio_bits;
00194 st->codec->block_align = st->codec->channels *
00195 st->codec->bits_per_coded_sample / 8;
00196 }
00197
00198 st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
00199 st->codec->bits_per_coded_sample;
00200 }
00201
00202
00203 if (avio_read(pb, scratch, 16) != 16)
00204 return AVERROR(EIO);
00205 if (AV_RB32(&scratch[0]) != STAB_TAG)
00206 return AVERROR_INVALIDDATA;
00207 film->base_clock = AV_RB32(&scratch[8]);
00208 film->sample_count = AV_RB32(&scratch[12]);
00209 if(film->sample_count >= UINT_MAX / sizeof(film_sample))
00210 return -1;
00211 film->sample_table = av_malloc(film->sample_count * sizeof(film_sample));
00212 if (!film->sample_table)
00213 return AVERROR(ENOMEM);
00214
00215 for(i=0; i<s->nb_streams; i++)
00216 avpriv_set_pts_info(s->streams[i], 33, 1, film->base_clock);
00217
00218 audio_frame_counter = 0;
00219 for (i = 0; i < film->sample_count; i++) {
00220
00221 if (avio_read(pb, scratch, 16) != 16) {
00222 ret = AVERROR(EIO);
00223 goto fail;
00224 }
00225 film->sample_table[i].sample_offset =
00226 data_offset + AV_RB32(&scratch[0]);
00227 film->sample_table[i].sample_size = AV_RB32(&scratch[4]);
00228 if (film->sample_table[i].sample_size > INT_MAX / 4) {
00229 ret = AVERROR_INVALIDDATA;
00230 goto fail;
00231 }
00232 if (AV_RB32(&scratch[8]) == 0xFFFFFFFF) {
00233 film->sample_table[i].stream = film->audio_stream_index;
00234 film->sample_table[i].pts = audio_frame_counter;
00235 film->sample_table[i].pts *= film->base_clock;
00236 film->sample_table[i].pts /= film->audio_samplerate;
00237
00238 if (film->audio_type == CODEC_ID_ADPCM_ADX)
00239 audio_frame_counter += (film->sample_table[i].sample_size * 32 /
00240 (18 * film->audio_channels));
00241 else if (film->audio_type != CODEC_ID_NONE)
00242 audio_frame_counter += (film->sample_table[i].sample_size /
00243 (film->audio_channels * film->audio_bits / 8));
00244 } else {
00245 film->sample_table[i].stream = film->video_stream_index;
00246 film->sample_table[i].pts = AV_RB32(&scratch[8]) & 0x7FFFFFFF;
00247 film->sample_table[i].keyframe = (scratch[8] & 0x80) ? 0 : 1;
00248 }
00249 }
00250
00251 film->current_sample = 0;
00252
00253 return 0;
00254 fail:
00255 film_read_close(s);
00256 return ret;
00257 }
00258
00259 static int film_read_packet(AVFormatContext *s,
00260 AVPacket *pkt)
00261 {
00262 FilmDemuxContext *film = s->priv_data;
00263 AVIOContext *pb = s->pb;
00264 film_sample *sample;
00265 int ret = 0;
00266 int i;
00267 int left, right;
00268
00269 if (film->current_sample >= film->sample_count)
00270 return AVERROR(EIO);
00271
00272 sample = &film->sample_table[film->current_sample];
00273
00274
00275 avio_seek(pb, sample->sample_offset, SEEK_SET);
00276
00277
00278 if ((sample->stream == film->video_stream_index) &&
00279 (film->video_type == CODEC_ID_CINEPAK)) {
00280 pkt->pos= avio_tell(pb);
00281 if (av_new_packet(pkt, sample->sample_size))
00282 return AVERROR(ENOMEM);
00283 avio_read(pb, pkt->data, sample->sample_size);
00284 } else if ((sample->stream == film->audio_stream_index) &&
00285 (film->audio_channels == 2) &&
00286 (film->audio_type != CODEC_ID_ADPCM_ADX)) {
00287
00288
00289 if (av_new_packet(pkt, sample->sample_size))
00290 return AVERROR(ENOMEM);
00291
00292
00293 if (sample->sample_size > film->stereo_buffer_size) {
00294 av_free(film->stereo_buffer);
00295 film->stereo_buffer_size = sample->sample_size;
00296 film->stereo_buffer = av_malloc(film->stereo_buffer_size);
00297 if (!film->stereo_buffer) {
00298 film->stereo_buffer_size = 0;
00299 return AVERROR(ENOMEM);
00300 }
00301 }
00302
00303 pkt->pos= avio_tell(pb);
00304 ret = avio_read(pb, film->stereo_buffer, sample->sample_size);
00305 if (ret != sample->sample_size)
00306 ret = AVERROR(EIO);
00307
00308 left = 0;
00309 right = sample->sample_size / 2;
00310 for (i = 0; i < sample->sample_size; ) {
00311 if (film->audio_bits == 8) {
00312 pkt->data[i++] = film->stereo_buffer[left++];
00313 pkt->data[i++] = film->stereo_buffer[right++];
00314 } else {
00315 pkt->data[i++] = film->stereo_buffer[left++];
00316 pkt->data[i++] = film->stereo_buffer[left++];
00317 pkt->data[i++] = film->stereo_buffer[right++];
00318 pkt->data[i++] = film->stereo_buffer[right++];
00319 }
00320 }
00321 } else {
00322 ret= av_get_packet(pb, pkt, sample->sample_size);
00323 if (ret != sample->sample_size)
00324 ret = AVERROR(EIO);
00325 }
00326
00327 pkt->stream_index = sample->stream;
00328 pkt->pts = sample->pts;
00329
00330 film->current_sample++;
00331
00332 return ret;
00333 }
00334
00335 AVInputFormat ff_segafilm_demuxer = {
00336 .name = "film_cpk",
00337 .long_name = NULL_IF_CONFIG_SMALL("Sega FILM/CPK format"),
00338 .priv_data_size = sizeof(FilmDemuxContext),
00339 .read_probe = film_probe,
00340 .read_header = film_read_header,
00341 .read_packet = film_read_packet,
00342 .read_close = film_read_close,
00343 };