yading@11: /* yading@11: * Sega FILM Format (CPK) Demuxer yading@11: * Copyright (c) 2003 The ffmpeg Project yading@11: * yading@11: * This file is part of FFmpeg. yading@11: * yading@11: * FFmpeg is free software; you can redistribute it and/or yading@11: * modify it under the terms of the GNU Lesser General Public yading@11: * License as published by the Free Software Foundation; either yading@11: * version 2.1 of the License, or (at your option) any later version. yading@11: * yading@11: * FFmpeg is distributed in the hope that it will be useful, yading@11: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@11: * Lesser General Public License for more details. yading@11: * yading@11: * You should have received a copy of the GNU Lesser General Public yading@11: * License along with FFmpeg; if not, write to the Free Software yading@11: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@11: */ yading@11: yading@11: /** yading@11: * @file yading@11: * Sega FILM (.cpk) file demuxer yading@11: * by Mike Melanson (melanson@pcisys.net) yading@11: * For more information regarding the Sega FILM file format, visit: yading@11: * http://www.pcisys.net/~melanson/codecs/ yading@11: */ yading@11: yading@11: #include "libavutil/intreadwrite.h" yading@11: #include "avformat.h" yading@11: #include "internal.h" yading@11: #include "avio_internal.h" yading@11: yading@11: #define FILM_TAG MKBETAG('F', 'I', 'L', 'M') yading@11: #define FDSC_TAG MKBETAG('F', 'D', 'S', 'C') yading@11: #define STAB_TAG MKBETAG('S', 'T', 'A', 'B') yading@11: #define CVID_TAG MKBETAG('c', 'v', 'i', 'd') yading@11: #define RAW_TAG MKBETAG('r', 'a', 'w', ' ') yading@11: yading@11: typedef struct { yading@11: int stream; yading@11: int64_t sample_offset; yading@11: unsigned int sample_size; yading@11: int64_t pts; yading@11: int keyframe; yading@11: } film_sample; yading@11: yading@11: typedef struct FilmDemuxContext { yading@11: int video_stream_index; yading@11: int audio_stream_index; yading@11: yading@11: enum AVCodecID audio_type; yading@11: unsigned int audio_samplerate; yading@11: unsigned int audio_bits; yading@11: unsigned int audio_channels; yading@11: yading@11: enum AVCodecID video_type; yading@11: unsigned int sample_count; yading@11: film_sample *sample_table; yading@11: unsigned int current_sample; yading@11: yading@11: unsigned int base_clock; yading@11: unsigned int version; yading@11: yading@11: /* buffer used for interleaving stereo PCM data */ yading@11: unsigned char *stereo_buffer; yading@11: int stereo_buffer_size; yading@11: } FilmDemuxContext; yading@11: yading@11: static int film_probe(AVProbeData *p) yading@11: { yading@11: if (AV_RB32(&p->buf[0]) != FILM_TAG) yading@11: return 0; yading@11: yading@11: return AVPROBE_SCORE_MAX; yading@11: } yading@11: yading@11: static int film_read_header(AVFormatContext *s) yading@11: { yading@11: FilmDemuxContext *film = s->priv_data; yading@11: AVIOContext *pb = s->pb; yading@11: AVStream *st; yading@11: unsigned char scratch[256]; yading@11: int i; yading@11: unsigned int data_offset; yading@11: unsigned int audio_frame_counter; yading@11: yading@11: film->sample_table = NULL; yading@11: film->stereo_buffer = NULL; yading@11: film->stereo_buffer_size = 0; yading@11: yading@11: /* load the main FILM header */ yading@11: if (avio_read(pb, scratch, 16) != 16) yading@11: return AVERROR(EIO); yading@11: data_offset = AV_RB32(&scratch[4]); yading@11: film->version = AV_RB32(&scratch[8]); yading@11: yading@11: /* load the FDSC chunk */ yading@11: if (film->version == 0) { yading@11: /* special case for Lemmings .film files; 20-byte header */ yading@11: if (avio_read(pb, scratch, 20) != 20) yading@11: return AVERROR(EIO); yading@11: /* make some assumptions about the audio parameters */ yading@11: film->audio_type = AV_CODEC_ID_PCM_S8; yading@11: film->audio_samplerate = 22050; yading@11: film->audio_channels = 1; yading@11: film->audio_bits = 8; yading@11: } else { yading@11: /* normal Saturn .cpk files; 32-byte header */ yading@11: if (avio_read(pb, scratch, 32) != 32) yading@11: return AVERROR(EIO); yading@11: film->audio_samplerate = AV_RB16(&scratch[24]); yading@11: film->audio_channels = scratch[21]; yading@11: film->audio_bits = scratch[22]; yading@11: if (scratch[23] == 2 && film->audio_channels > 0) yading@11: film->audio_type = AV_CODEC_ID_ADPCM_ADX; yading@11: else if (film->audio_channels > 0) { yading@11: if (film->audio_bits == 8) yading@11: film->audio_type = AV_CODEC_ID_PCM_S8; yading@11: else if (film->audio_bits == 16) yading@11: film->audio_type = AV_CODEC_ID_PCM_S16BE; yading@11: else yading@11: film->audio_type = AV_CODEC_ID_NONE; yading@11: } else yading@11: film->audio_type = AV_CODEC_ID_NONE; yading@11: } yading@11: yading@11: if (AV_RB32(&scratch[0]) != FDSC_TAG) yading@11: return AVERROR_INVALIDDATA; yading@11: yading@11: if (AV_RB32(&scratch[8]) == CVID_TAG) { yading@11: film->video_type = AV_CODEC_ID_CINEPAK; yading@11: } else if (AV_RB32(&scratch[8]) == RAW_TAG) { yading@11: film->video_type = AV_CODEC_ID_RAWVIDEO; yading@11: } else { yading@11: film->video_type = AV_CODEC_ID_NONE; yading@11: } yading@11: yading@11: /* initialize the decoder streams */ yading@11: if (film->video_type) { yading@11: st = avformat_new_stream(s, NULL); yading@11: if (!st) yading@11: return AVERROR(ENOMEM); yading@11: film->video_stream_index = st->index; yading@11: st->codec->codec_type = AVMEDIA_TYPE_VIDEO; yading@11: st->codec->codec_id = film->video_type; yading@11: st->codec->codec_tag = 0; /* no fourcc */ yading@11: st->codec->width = AV_RB32(&scratch[16]); yading@11: st->codec->height = AV_RB32(&scratch[12]); yading@11: yading@11: if (film->video_type == AV_CODEC_ID_RAWVIDEO) { yading@11: if (scratch[20] == 24) { yading@11: st->codec->pix_fmt = AV_PIX_FMT_RGB24; yading@11: } else { yading@11: av_log(s, AV_LOG_ERROR, "raw video is using unhandled %dbpp\n", scratch[20]); yading@11: return -1; yading@11: } yading@11: } yading@11: } yading@11: yading@11: if (film->audio_type) { yading@11: st = avformat_new_stream(s, NULL); yading@11: if (!st) yading@11: return AVERROR(ENOMEM); yading@11: film->audio_stream_index = st->index; yading@11: st->codec->codec_type = AVMEDIA_TYPE_AUDIO; yading@11: st->codec->codec_id = film->audio_type; yading@11: st->codec->codec_tag = 1; yading@11: st->codec->channels = film->audio_channels; yading@11: st->codec->sample_rate = film->audio_samplerate; yading@11: yading@11: if (film->audio_type == AV_CODEC_ID_ADPCM_ADX) { yading@11: st->codec->bits_per_coded_sample = 18 * 8 / 32; yading@11: st->codec->block_align = st->codec->channels * 18; yading@11: st->need_parsing = AVSTREAM_PARSE_FULL; yading@11: } else { yading@11: st->codec->bits_per_coded_sample = film->audio_bits; yading@11: st->codec->block_align = st->codec->channels * yading@11: st->codec->bits_per_coded_sample / 8; yading@11: } yading@11: yading@11: st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * yading@11: st->codec->bits_per_coded_sample; yading@11: } yading@11: yading@11: /* load the sample table */ yading@11: if (avio_read(pb, scratch, 16) != 16) yading@11: return AVERROR(EIO); yading@11: if (AV_RB32(&scratch[0]) != STAB_TAG) yading@11: return AVERROR_INVALIDDATA; yading@11: film->base_clock = AV_RB32(&scratch[8]); yading@11: film->sample_count = AV_RB32(&scratch[12]); yading@11: if(film->sample_count >= UINT_MAX / sizeof(film_sample)) yading@11: return -1; yading@11: film->sample_table = av_malloc(film->sample_count * sizeof(film_sample)); yading@11: if (!film->sample_table) yading@11: return AVERROR(ENOMEM); yading@11: yading@11: for (i = 0; i < s->nb_streams; i++) { yading@11: st = s->streams[i]; yading@11: if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) yading@11: avpriv_set_pts_info(st, 33, 1, film->base_clock); yading@11: else yading@11: avpriv_set_pts_info(st, 64, 1, film->audio_samplerate); yading@11: } yading@11: yading@11: audio_frame_counter = 0; yading@11: for (i = 0; i < film->sample_count; i++) { yading@11: /* load the next sample record and transfer it to an internal struct */ yading@11: if (avio_read(pb, scratch, 16) != 16) { yading@11: av_free(film->sample_table); yading@11: return AVERROR(EIO); yading@11: } yading@11: film->sample_table[i].sample_offset = yading@11: data_offset + AV_RB32(&scratch[0]); yading@11: film->sample_table[i].sample_size = AV_RB32(&scratch[4]); yading@11: if (AV_RB32(&scratch[8]) == 0xFFFFFFFF) { yading@11: film->sample_table[i].stream = film->audio_stream_index; yading@11: film->sample_table[i].pts = audio_frame_counter; yading@11: yading@11: if (film->audio_type == AV_CODEC_ID_ADPCM_ADX) yading@11: audio_frame_counter += (film->sample_table[i].sample_size * 32 / yading@11: (18 * film->audio_channels)); yading@11: else if (film->audio_type != AV_CODEC_ID_NONE) yading@11: audio_frame_counter += (film->sample_table[i].sample_size / yading@11: (film->audio_channels * film->audio_bits / 8)); yading@11: } else { yading@11: film->sample_table[i].stream = film->video_stream_index; yading@11: film->sample_table[i].pts = AV_RB32(&scratch[8]) & 0x7FFFFFFF; yading@11: film->sample_table[i].keyframe = (scratch[8] & 0x80) ? 0 : 1; yading@11: } yading@11: } yading@11: yading@11: film->current_sample = 0; yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int film_read_packet(AVFormatContext *s, yading@11: AVPacket *pkt) yading@11: { yading@11: FilmDemuxContext *film = s->priv_data; yading@11: AVIOContext *pb = s->pb; yading@11: film_sample *sample; yading@11: int ret = 0; yading@11: int i; yading@11: int left, right; yading@11: yading@11: if (film->current_sample >= film->sample_count) yading@11: return AVERROR_EOF; yading@11: yading@11: sample = &film->sample_table[film->current_sample]; yading@11: yading@11: /* position the stream (will probably be there anyway) */ yading@11: avio_seek(pb, sample->sample_offset, SEEK_SET); yading@11: yading@11: /* do a special song and dance when loading FILM Cinepak chunks */ yading@11: if ((sample->stream == film->video_stream_index) && yading@11: (film->video_type == AV_CODEC_ID_CINEPAK)) { yading@11: pkt->pos= avio_tell(pb); yading@11: if (av_new_packet(pkt, sample->sample_size)) yading@11: return AVERROR(ENOMEM); yading@11: avio_read(pb, pkt->data, sample->sample_size); yading@11: } else if ((sample->stream == film->audio_stream_index) && yading@11: (film->audio_channels == 2) && yading@11: (film->audio_type != AV_CODEC_ID_ADPCM_ADX)) { yading@11: /* stereo PCM needs to be interleaved */ yading@11: yading@11: if (ffio_limit(pb, sample->sample_size) != sample->sample_size) yading@11: return AVERROR(EIO); yading@11: if (av_new_packet(pkt, sample->sample_size)) yading@11: return AVERROR(ENOMEM); yading@11: yading@11: /* make sure the interleave buffer is large enough */ yading@11: if (sample->sample_size > film->stereo_buffer_size) { yading@11: av_free(film->stereo_buffer); yading@11: film->stereo_buffer_size = sample->sample_size; yading@11: film->stereo_buffer = av_malloc(film->stereo_buffer_size); yading@11: if (!film->stereo_buffer) { yading@11: film->stereo_buffer_size = 0; yading@11: return AVERROR(ENOMEM); yading@11: } yading@11: } yading@11: yading@11: pkt->pos= avio_tell(pb); yading@11: ret = avio_read(pb, film->stereo_buffer, sample->sample_size); yading@11: if (ret != sample->sample_size) yading@11: ret = AVERROR(EIO); yading@11: yading@11: left = 0; yading@11: right = sample->sample_size / 2; yading@11: for (i = 0; i + 1 + 2*(film->audio_bits != 8) < sample->sample_size; ) { yading@11: if (film->audio_bits == 8) { yading@11: pkt->data[i++] = film->stereo_buffer[left++]; yading@11: pkt->data[i++] = film->stereo_buffer[right++]; yading@11: } else { yading@11: pkt->data[i++] = film->stereo_buffer[left++]; yading@11: pkt->data[i++] = film->stereo_buffer[left++]; yading@11: pkt->data[i++] = film->stereo_buffer[right++]; yading@11: pkt->data[i++] = film->stereo_buffer[right++]; yading@11: } yading@11: } yading@11: } else { yading@11: ret= av_get_packet(pb, pkt, sample->sample_size); yading@11: if (ret != sample->sample_size) yading@11: ret = AVERROR(EIO); yading@11: } yading@11: yading@11: pkt->stream_index = sample->stream; yading@11: pkt->pts = sample->pts; yading@11: yading@11: film->current_sample++; yading@11: yading@11: return ret; yading@11: } yading@11: yading@11: static int film_read_close(AVFormatContext *s) yading@11: { yading@11: FilmDemuxContext *film = s->priv_data; yading@11: yading@11: av_free(film->sample_table); yading@11: av_free(film->stereo_buffer); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: AVInputFormat ff_segafilm_demuxer = { yading@11: .name = "film_cpk", yading@11: .long_name = NULL_IF_CONFIG_SMALL("Sega FILM / CPK"), yading@11: .priv_data_size = sizeof(FilmDemuxContext), yading@11: .read_probe = film_probe, yading@11: .read_header = film_read_header, yading@11: .read_packet = film_read_packet, yading@11: .read_close = film_read_close, yading@11: };