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790f793844
There are lots of files that don't need it: The number of object files that actually need it went down from 2011 to 884 here. Keep it for external users in order to not cause breakages. Also improve the other headers a bit while just at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
339 lines
11 KiB
C
339 lines
11 KiB
C
/*
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* Sega FILM Format (CPK) Demuxer
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* Copyright (c) 2003 The FFmpeg project
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Sega FILM (.cpk) file demuxer
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* by Mike Melanson (melanson@pcisys.net)
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* For more information regarding the Sega FILM file format, visit:
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* http://www.pcisys.net/~melanson/codecs/
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*/
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mem.h"
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#include "avformat.h"
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#include "demux.h"
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#include "internal.h"
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#define FILM_TAG MKBETAG('F', 'I', 'L', 'M')
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#define FDSC_TAG MKBETAG('F', 'D', 'S', 'C')
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#define STAB_TAG MKBETAG('S', 'T', 'A', 'B')
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#define CVID_TAG MKBETAG('c', 'v', 'i', 'd')
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#define RAW_TAG MKBETAG('r', 'a', 'w', ' ')
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typedef struct film_sample {
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int stream;
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unsigned int sample_size;
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int64_t sample_offset;
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int64_t pts;
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int keyframe;
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} film_sample;
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typedef struct FilmDemuxContext {
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int video_stream_index;
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int audio_stream_index;
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enum AVCodecID audio_type;
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unsigned int audio_samplerate;
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unsigned int audio_bits;
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unsigned int audio_channels;
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enum AVCodecID video_type;
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unsigned int sample_count;
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film_sample *sample_table;
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unsigned int current_sample;
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unsigned int base_clock;
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unsigned int version;
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} FilmDemuxContext;
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static int film_probe(const AVProbeData *p)
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{
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if (AV_RB32(&p->buf[0]) != FILM_TAG)
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return 0;
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if (AV_RB32(&p->buf[16]) != FDSC_TAG)
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return 0;
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return AVPROBE_SCORE_MAX;
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}
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static int film_read_close(AVFormatContext *s)
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{
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FilmDemuxContext *film = s->priv_data;
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av_freep(&film->sample_table);
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return 0;
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}
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static int film_read_header(AVFormatContext *s)
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{
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FilmDemuxContext *film = s->priv_data;
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AVIOContext *pb = s->pb;
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AVStream *st;
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unsigned char scratch[256];
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int i;
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unsigned int data_offset;
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unsigned int audio_frame_counter;
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unsigned int video_frame_counter;
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film->sample_table = NULL;
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/* load the main FILM header */
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if (avio_read(pb, scratch, 16) != 16)
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return AVERROR(EIO);
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data_offset = AV_RB32(&scratch[4]);
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film->version = AV_RB32(&scratch[8]);
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/* load the FDSC chunk */
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if (film->version == 0) {
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/* special case for Lemmings .film files; 20-byte header */
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if (avio_read(pb, scratch, 20) != 20)
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return AVERROR(EIO);
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/* make some assumptions about the audio parameters */
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film->audio_type = AV_CODEC_ID_PCM_S8;
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film->audio_samplerate = 22050;
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film->audio_channels = 1;
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film->audio_bits = 8;
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} else {
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/* normal Saturn .cpk files; 32-byte header */
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if (avio_read(pb, scratch, 32) != 32)
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return AVERROR(EIO);
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film->audio_samplerate = AV_RB16(&scratch[24]);
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film->audio_channels = scratch[21];
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film->audio_bits = scratch[22];
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if (scratch[23] == 2 && film->audio_channels > 0)
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film->audio_type = AV_CODEC_ID_ADPCM_ADX;
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else if (film->audio_channels > 0) {
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if (film->audio_bits == 8)
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film->audio_type = AV_CODEC_ID_PCM_S8_PLANAR;
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else if (film->audio_bits == 16)
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film->audio_type = AV_CODEC_ID_PCM_S16BE_PLANAR;
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else
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film->audio_type = AV_CODEC_ID_NONE;
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} else
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film->audio_type = AV_CODEC_ID_NONE;
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}
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if (AV_RB32(&scratch[0]) != FDSC_TAG)
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return AVERROR_INVALIDDATA;
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if (AV_RB32(&scratch[8]) == CVID_TAG) {
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film->video_type = AV_CODEC_ID_CINEPAK;
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} else if (AV_RB32(&scratch[8]) == RAW_TAG) {
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film->video_type = AV_CODEC_ID_RAWVIDEO;
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} else {
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film->video_type = AV_CODEC_ID_NONE;
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}
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if (film->video_type == AV_CODEC_ID_NONE && film->audio_type == AV_CODEC_ID_NONE)
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return AVERROR_INVALIDDATA;
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/* initialize the decoder streams */
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if (film->video_type != AV_CODEC_ID_NONE) {
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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film->video_stream_index = st->index;
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codecpar->codec_id = film->video_type;
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st->codecpar->codec_tag = 0; /* no fourcc */
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st->codecpar->width = AV_RB32(&scratch[16]);
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st->codecpar->height = AV_RB32(&scratch[12]);
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if (film->video_type == AV_CODEC_ID_RAWVIDEO) {
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if (scratch[20] == 24) {
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st->codecpar->format = AV_PIX_FMT_RGB24;
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} else {
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av_log(s, AV_LOG_ERROR, "raw video is using unhandled %dbpp\n", scratch[20]);
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return -1;
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}
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}
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}
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if (film->audio_type != AV_CODEC_ID_NONE) {
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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film->audio_stream_index = st->index;
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_id = film->audio_type;
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st->codecpar->codec_tag = 1;
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st->codecpar->ch_layout.nb_channels = film->audio_channels;
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st->codecpar->sample_rate = film->audio_samplerate;
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if (film->audio_type == AV_CODEC_ID_ADPCM_ADX) {
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st->codecpar->bits_per_coded_sample = 18 * 8 / 32;
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st->codecpar->block_align = film->audio_channels * 18;
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ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL;
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} else {
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st->codecpar->bits_per_coded_sample = film->audio_bits;
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st->codecpar->block_align = film->audio_channels *
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st->codecpar->bits_per_coded_sample / 8;
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}
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st->codecpar->bit_rate = film->audio_channels * st->codecpar->sample_rate *
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st->codecpar->bits_per_coded_sample;
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}
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/* load the sample table */
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if (avio_read(pb, scratch, 16) != 16)
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return AVERROR(EIO);
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if (AV_RB32(&scratch[0]) != STAB_TAG)
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return AVERROR_INVALIDDATA;
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film->base_clock = AV_RB32(&scratch[8]);
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film->sample_count = AV_RB32(&scratch[12]);
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film->sample_table = av_malloc_array(film->sample_count, sizeof(film_sample));
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if (!film->sample_table)
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return AVERROR(ENOMEM);
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for (i = 0; i < s->nb_streams; i++) {
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st = s->streams[i];
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if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
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avpriv_set_pts_info(st, 33, 1, film->base_clock);
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else
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avpriv_set_pts_info(st, 64, 1, film->audio_samplerate);
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}
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audio_frame_counter = video_frame_counter = 0;
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for (i = 0; i < film->sample_count; i++) {
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/* load the next sample record and transfer it to an internal struct */
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if (avio_read(pb, scratch, 16) != 16)
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return AVERROR(EIO);
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film->sample_table[i].sample_offset =
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data_offset + AV_RB32(&scratch[0]);
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film->sample_table[i].sample_size = AV_RB32(&scratch[4]);
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if (film->sample_table[i].sample_size > INT_MAX / 4)
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return AVERROR_INVALIDDATA;
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if (AV_RB32(&scratch[8]) == 0xFFFFFFFF) {
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film->sample_table[i].stream = film->audio_stream_index;
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film->sample_table[i].pts = audio_frame_counter;
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if (film->audio_type == AV_CODEC_ID_ADPCM_ADX)
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audio_frame_counter += (film->sample_table[i].sample_size * 32 /
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(18 * film->audio_channels));
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else if (film->audio_type != AV_CODEC_ID_NONE)
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audio_frame_counter += (film->sample_table[i].sample_size /
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(film->audio_channels * film->audio_bits / 8));
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} else {
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film->sample_table[i].stream = film->video_stream_index;
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film->sample_table[i].pts = AV_RB32(&scratch[8]) & 0x7FFFFFFF;
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film->sample_table[i].keyframe = (scratch[8] & 0x80) ? 0 : AVINDEX_KEYFRAME;
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video_frame_counter++;
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if (film->video_type != AV_CODEC_ID_NONE)
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av_add_index_entry(s->streams[film->video_stream_index],
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film->sample_table[i].sample_offset,
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film->sample_table[i].pts,
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film->sample_table[i].sample_size, 0,
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film->sample_table[i].keyframe);
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}
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}
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if (film->audio_type != AV_CODEC_ID_NONE)
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s->streams[film->audio_stream_index]->duration = audio_frame_counter;
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if (film->video_type != AV_CODEC_ID_NONE)
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s->streams[film->video_stream_index]->duration = video_frame_counter;
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film->current_sample = 0;
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return 0;
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}
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static int film_read_packet(AVFormatContext *s,
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AVPacket *pkt)
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{
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FilmDemuxContext *film = s->priv_data;
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AVIOContext *pb = s->pb;
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film_sample *sample;
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film_sample *next_sample = NULL;
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int next_sample_id;
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int ret = 0;
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if (film->current_sample >= film->sample_count)
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return AVERROR_EOF;
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sample = &film->sample_table[film->current_sample];
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/* Find the next sample from the same stream, assuming there is one;
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* this is used to calculate the duration below */
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next_sample_id = film->current_sample + 1;
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while (next_sample == NULL) {
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if (next_sample_id >= film->sample_count)
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break;
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next_sample = &film->sample_table[next_sample_id];
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if (next_sample->stream != sample->stream) {
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next_sample = NULL;
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next_sample_id++;
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}
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}
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/* position the stream (will probably be there anyway) */
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avio_seek(pb, sample->sample_offset, SEEK_SET);
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ret = av_get_packet(pb, pkt, sample->sample_size);
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if (ret != sample->sample_size)
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ret = AVERROR(EIO);
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pkt->stream_index = sample->stream;
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pkt->dts = sample->pts;
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pkt->pts = sample->pts;
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pkt->flags |= sample->keyframe ? AV_PKT_FLAG_KEY : 0;
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if (next_sample != NULL)
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pkt->duration = next_sample->pts - sample->pts;
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film->current_sample++;
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return ret;
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}
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static int film_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
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{
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FilmDemuxContext *film = s->priv_data;
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AVStream *st = s->streams[stream_index];
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int64_t pos;
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int ret = av_index_search_timestamp(st, timestamp, flags);
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if (ret < 0)
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return ret;
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pos = avio_seek(s->pb, ffstream(st)->index_entries[ret].pos, SEEK_SET);
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if (pos < 0)
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return pos;
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film->current_sample = ret;
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return 0;
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}
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const FFInputFormat ff_segafilm_demuxer = {
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.p.name = "film_cpk",
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.p.long_name = NULL_IF_CONFIG_SMALL("Sega FILM / CPK"),
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.priv_data_size = sizeof(FilmDemuxContext),
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.flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
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.read_probe = film_probe,
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.read_header = film_read_header,
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.read_packet = film_read_packet,
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.read_close = film_read_close,
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.read_seek = film_read_seek,
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};
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