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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_header(AVFormatContext *s,
00079 AVFormatParameters *ap)
00080 {
00081 FilmDemuxContext *film = s->priv_data;
00082 AVIOContext *pb = s->pb;
00083 AVStream *st;
00084 unsigned char scratch[256];
00085 int i;
00086 unsigned int data_offset;
00087 unsigned int audio_frame_counter;
00088
00089 film->sample_table = NULL;
00090 film->stereo_buffer = NULL;
00091 film->stereo_buffer_size = 0;
00092
00093
00094 if (avio_read(pb, scratch, 16) != 16)
00095 return AVERROR(EIO);
00096 data_offset = AV_RB32(&scratch[4]);
00097 film->version = AV_RB32(&scratch[8]);
00098
00099
00100 if (film->version == 0) {
00101
00102 if (avio_read(pb, scratch, 20) != 20)
00103 return AVERROR(EIO);
00104
00105 film->audio_type = CODEC_ID_PCM_S8;
00106 film->audio_samplerate = 22050;
00107 film->audio_channels = 1;
00108 film->audio_bits = 8;
00109 } else {
00110
00111 if (avio_read(pb, scratch, 32) != 32)
00112 return AVERROR(EIO);
00113 film->audio_samplerate = AV_RB16(&scratch[24]);
00114 film->audio_channels = scratch[21];
00115 film->audio_bits = scratch[22];
00116 if (scratch[23] == 2)
00117 film->audio_type = CODEC_ID_ADPCM_ADX;
00118 else if (film->audio_channels > 0) {
00119 if (film->audio_bits == 8)
00120 film->audio_type = CODEC_ID_PCM_S8;
00121 else if (film->audio_bits == 16)
00122 film->audio_type = CODEC_ID_PCM_S16BE;
00123 else
00124 film->audio_type = CODEC_ID_NONE;
00125 } else
00126 film->audio_type = CODEC_ID_NONE;
00127 }
00128
00129 if (AV_RB32(&scratch[0]) != FDSC_TAG)
00130 return AVERROR_INVALIDDATA;
00131
00132 if (AV_RB32(&scratch[8]) == CVID_TAG) {
00133 film->video_type = CODEC_ID_CINEPAK;
00134 } else if (AV_RB32(&scratch[8]) == RAW_TAG) {
00135 film->video_type = CODEC_ID_RAWVIDEO;
00136 } else {
00137 film->video_type = CODEC_ID_NONE;
00138 }
00139
00140
00141 if (film->video_type) {
00142 st = avformat_new_stream(s, NULL);
00143 if (!st)
00144 return AVERROR(ENOMEM);
00145 film->video_stream_index = st->index;
00146 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00147 st->codec->codec_id = film->video_type;
00148 st->codec->codec_tag = 0;
00149 st->codec->width = AV_RB32(&scratch[16]);
00150 st->codec->height = AV_RB32(&scratch[12]);
00151
00152 if (film->video_type == CODEC_ID_RAWVIDEO) {
00153 if (scratch[20] == 24) {
00154 st->codec->pix_fmt = PIX_FMT_RGB24;
00155 } else {
00156 av_log(s, AV_LOG_ERROR, "raw video is using unhandled %dbpp\n", scratch[20]);
00157 return -1;
00158 }
00159 }
00160 }
00161
00162 if (film->audio_type) {
00163 st = avformat_new_stream(s, NULL);
00164 if (!st)
00165 return AVERROR(ENOMEM);
00166 film->audio_stream_index = st->index;
00167 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
00168 st->codec->codec_id = film->audio_type;
00169 st->codec->codec_tag = 1;
00170 st->codec->channels = film->audio_channels;
00171 st->codec->sample_rate = film->audio_samplerate;
00172
00173 if (film->audio_type == CODEC_ID_ADPCM_ADX) {
00174 st->codec->bits_per_coded_sample = 18 * 8 / 32;
00175 st->codec->block_align = st->codec->channels * 18;
00176 st->need_parsing = AVSTREAM_PARSE_FULL;
00177 } else {
00178 st->codec->bits_per_coded_sample = film->audio_bits;
00179 st->codec->block_align = st->codec->channels *
00180 st->codec->bits_per_coded_sample / 8;
00181 }
00182
00183 st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
00184 st->codec->bits_per_coded_sample;
00185 }
00186
00187
00188 if (avio_read(pb, scratch, 16) != 16)
00189 return AVERROR(EIO);
00190 if (AV_RB32(&scratch[0]) != STAB_TAG)
00191 return AVERROR_INVALIDDATA;
00192 film->base_clock = AV_RB32(&scratch[8]);
00193 film->sample_count = AV_RB32(&scratch[12]);
00194 if(film->sample_count >= UINT_MAX / sizeof(film_sample))
00195 return -1;
00196 film->sample_table = av_malloc(film->sample_count * sizeof(film_sample));
00197 if (!film->sample_table)
00198 return AVERROR(ENOMEM);
00199
00200 for(i=0; i<s->nb_streams; i++)
00201 avpriv_set_pts_info(s->streams[i], 33, 1, film->base_clock);
00202
00203 audio_frame_counter = 0;
00204 for (i = 0; i < film->sample_count; i++) {
00205
00206 if (avio_read(pb, scratch, 16) != 16) {
00207 av_free(film->sample_table);
00208 return AVERROR(EIO);
00209 }
00210 film->sample_table[i].sample_offset =
00211 data_offset + AV_RB32(&scratch[0]);
00212 film->sample_table[i].sample_size = AV_RB32(&scratch[4]);
00213 if (film->sample_table[i].sample_size > INT_MAX / 4)
00214 return AVERROR_INVALIDDATA;
00215 if (AV_RB32(&scratch[8]) == 0xFFFFFFFF) {
00216 film->sample_table[i].stream = film->audio_stream_index;
00217 film->sample_table[i].pts = audio_frame_counter;
00218 film->sample_table[i].pts *= film->base_clock;
00219 film->sample_table[i].pts /= film->audio_samplerate;
00220
00221 if (film->audio_type == CODEC_ID_ADPCM_ADX)
00222 audio_frame_counter += (film->sample_table[i].sample_size * 32 /
00223 (18 * film->audio_channels));
00224 else if (film->audio_type != CODEC_ID_NONE)
00225 audio_frame_counter += (film->sample_table[i].sample_size /
00226 (film->audio_channels * film->audio_bits / 8));
00227 } else {
00228 film->sample_table[i].stream = film->video_stream_index;
00229 film->sample_table[i].pts = AV_RB32(&scratch[8]) & 0x7FFFFFFF;
00230 film->sample_table[i].keyframe = (scratch[8] & 0x80) ? 0 : 1;
00231 }
00232 }
00233
00234 film->current_sample = 0;
00235
00236 return 0;
00237 }
00238
00239 static int film_read_packet(AVFormatContext *s,
00240 AVPacket *pkt)
00241 {
00242 FilmDemuxContext *film = s->priv_data;
00243 AVIOContext *pb = s->pb;
00244 film_sample *sample;
00245 int ret = 0;
00246 int i;
00247 int left, right;
00248
00249 if (film->current_sample >= film->sample_count)
00250 return AVERROR(EIO);
00251
00252 sample = &film->sample_table[film->current_sample];
00253
00254
00255 avio_seek(pb, sample->sample_offset, SEEK_SET);
00256
00257
00258 if ((sample->stream == film->video_stream_index) &&
00259 (film->video_type == CODEC_ID_CINEPAK)) {
00260 pkt->pos= avio_tell(pb);
00261 if (av_new_packet(pkt, sample->sample_size))
00262 return AVERROR(ENOMEM);
00263 avio_read(pb, pkt->data, sample->sample_size);
00264 } else if ((sample->stream == film->audio_stream_index) &&
00265 (film->audio_channels == 2) &&
00266 (film->audio_type != CODEC_ID_ADPCM_ADX)) {
00267
00268
00269 if (av_new_packet(pkt, sample->sample_size))
00270 return AVERROR(ENOMEM);
00271
00272
00273 if (sample->sample_size > film->stereo_buffer_size) {
00274 av_free(film->stereo_buffer);
00275 film->stereo_buffer_size = sample->sample_size;
00276 film->stereo_buffer = av_malloc(film->stereo_buffer_size);
00277 if (!film->stereo_buffer) {
00278 film->stereo_buffer_size = 0;
00279 return AVERROR(ENOMEM);
00280 }
00281 }
00282
00283 pkt->pos= avio_tell(pb);
00284 ret = avio_read(pb, film->stereo_buffer, sample->sample_size);
00285 if (ret != sample->sample_size)
00286 ret = AVERROR(EIO);
00287
00288 left = 0;
00289 right = sample->sample_size / 2;
00290 for (i = 0; i < sample->sample_size; ) {
00291 if (film->audio_bits == 8) {
00292 pkt->data[i++] = film->stereo_buffer[left++];
00293 pkt->data[i++] = film->stereo_buffer[right++];
00294 } else {
00295 pkt->data[i++] = film->stereo_buffer[left++];
00296 pkt->data[i++] = film->stereo_buffer[left++];
00297 pkt->data[i++] = film->stereo_buffer[right++];
00298 pkt->data[i++] = film->stereo_buffer[right++];
00299 }
00300 }
00301 } else {
00302 ret= av_get_packet(pb, pkt, sample->sample_size);
00303 if (ret != sample->sample_size)
00304 ret = AVERROR(EIO);
00305 }
00306
00307 pkt->stream_index = sample->stream;
00308 pkt->pts = sample->pts;
00309
00310 film->current_sample++;
00311
00312 return ret;
00313 }
00314
00315 static int film_read_close(AVFormatContext *s)
00316 {
00317 FilmDemuxContext *film = s->priv_data;
00318
00319 av_free(film->sample_table);
00320 av_free(film->stereo_buffer);
00321
00322 return 0;
00323 }
00324
00325 AVInputFormat ff_segafilm_demuxer = {
00326 .name = "film_cpk",
00327 .long_name = NULL_IF_CONFIG_SMALL("Sega FILM/CPK format"),
00328 .priv_data_size = sizeof(FilmDemuxContext),
00329 .read_probe = film_probe,
00330 .read_header = film_read_header,
00331 .read_packet = film_read_packet,
00332 .read_close = film_read_close,
00333 };