From b40a061fcb4b2c249b5dd3208f7148d5990f537d Mon Sep 17 00:00:00 2001 From: Mike Melanson Date: Sat, 2 Dec 2006 21:28:05 +0000 Subject: [PATCH] Simplify the Sega FILM/CPK demuxer to not modify the bastardized Cinepak stream. I changes the lavc Cinepak decoder some time ago to be able to handle the deviant data, but never updated this demuxer. Originally committed as revision 7214 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavformat/segafilm.c | 21 +++------------------ 1 file changed, 3 insertions(+), 18 deletions(-) diff --git a/libavformat/segafilm.c b/libavformat/segafilm.c index 4feb972..56e898b 100644 --- a/libavformat/segafilm.c +++ b/libavformat/segafilm.c @@ -58,8 +58,6 @@ typedef struct FilmDemuxContext { unsigned int base_clock; unsigned int version; - int cvid_extra_bytes; /* the number of bytes thrown into the Cinepak - * chunk header to throw off decoders */ /* buffer used for interleaving stereo PCM data */ unsigned char *stereo_buffer; @@ -126,13 +124,8 @@ static int film_read_header(AVFormatContext *s, if (BE_32(&scratch[0]) != FDSC_TAG) return AVERROR_INVALIDDATA; - film->cvid_extra_bytes = 0; if (BE_32(&scratch[8]) == CVID_TAG) { film->video_type = CODEC_ID_CINEPAK; - if (film->version) - film->cvid_extra_bytes = 2; - else - film->cvid_extra_bytes = 6; /* Lemmings 3DO case */ } else film->video_type = 0; @@ -231,18 +224,10 @@ static int film_read_packet(AVFormatContext *s, /* do a special song and dance when loading FILM Cinepak chunks */ if ((sample->stream == film->video_stream_index) && (film->video_type == CODEC_ID_CINEPAK)) { - if (av_new_packet(pkt, sample->sample_size - film->cvid_extra_bytes)) - return AVERROR_NOMEM; - if(pkt->size < 10) - return -1; pkt->pos= url_ftell(pb); - ret = get_buffer(pb, pkt->data, 10); - /* skip the non-spec CVID bytes */ - url_fseek(pb, film->cvid_extra_bytes, SEEK_CUR); - ret += get_buffer(pb, pkt->data + 10, - sample->sample_size - 10 - film->cvid_extra_bytes); - if (ret != sample->sample_size - film->cvid_extra_bytes) - ret = AVERROR_IO; + if (av_new_packet(pkt, sample->sample_size)) + return AVERROR_NOMEM; + get_buffer(pb, pkt->data, sample->sample_size); } else if ((sample->stream == film->audio_stream_index) && (film->audio_channels == 2)) { /* stereo PCM needs to be interleaved */ -- 2.7.4