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avformat/cdxl: add back options to override sample and frame rate

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It make sense to allow to control speed of playback when
no infomation is provided.
This commit is contained in:
Paul B Mahol 2021-02-05 18:06:28 +01:00
parent 2a2f685613
commit 6b8ef5119c
1 changed files with 19 additions and 2 deletions
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21
libavformat/cdxl.c
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@ -33,6 +33,8 @@ typedef struct CDXLDemuxContext {
int read_chunk;
AVRational frate;
int srate;
AVRational frame_rate;
int sample_rate;
uint8_t header[CDXL_HEADER_SIZE];
int video_stream_index;
int audio_stream_index;
@ -143,7 +145,7 @@ static int cdxl_read_packet(AVFormatContext *s, AVPacket *pkt)
audio_size = AV_RB16(&cdxl->header[22]) * channels;
cdxl->srate = AV_RB16(&cdxl->header[24]);
if (!cdxl->srate && audio_size)
cdxl->srate = 11025;
cdxl->srate = cdxl->sample_rate;
cdxl->frate.num = cdxl->header[26];
cdxl->frate.den = 1;
if (cdxl->header[19] == 0 ||
@ -164,7 +166,7 @@ static int cdxl_read_packet(AVFormatContext *s, AVPacket *pkt)
if (!cdxl->frate.num && audio_size && cdxl->srate > 0) {
cdxl->frate = (AVRational){ cdxl->srate, audio_size };
} else if (!cdxl->frate.num) {
cdxl->frate.num = 15;
cdxl->frate = cdxl->frame_rate;
}
if (cdxl->read_chunk && audio_size) {
@ -242,10 +244,25 @@ static int read_seek(AVFormatContext *s, int stream_index,
return -1;
}
#define OFFSET(x) offsetof(CDXLDemuxContext, x)
static const AVOption cdxl_options[] = {
{ "sample_rate", "", OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64=11025 }, 8000, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
{ "frame_rate", "", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, { .str="15" }, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
{ NULL },
};
static const AVClass cdxl_demuxer_class = {
.class_name = "CDXL demuxer",
.item_name = av_default_item_name,
.option = cdxl_options,
.version = LIBAVUTIL_VERSION_INT,
};
AVInputFormat ff_cdxl_demuxer = {
.name = "cdxl",
.long_name = NULL_IF_CONFIG_SMALL("Commodore CDXL video"),
.priv_data_size = sizeof(CDXLDemuxContext),
.priv_class = &cdxl_demuxer_class,
.read_probe = cdxl_read_probe,
.read_header = cdxl_read_header,
.read_packet = cdxl_read_packet,