static int frame_header_is_valid(AVCodecContext *avctx, const uint8_t *buf,
FLACFrameInfo *fi)
{
BitstreamContext bc;
bitstream_init8(&bc, buf, MAX_FRAME_HEADER_SIZE);
return !ff_flac_decode_frame_header(avctx, &bc, fi, 127);
}
static int frame_header_is_valid(AVCodecContext *avctx, const uint8_t *buf,
FLACFrameInfo *fi)
{
GetBitContext gb;
init_get_bits(&gb, buf, MAX_FRAME_HEADER_SIZE * 8);
return !ff_flac_decode_frame_header(avctx, &gb, fi, 127);
}
static int decode_frame(FLACContext *s)
{
int i, ret;
GetBitContext *gb = &s->gb;
FLACFrameInfo fi;
if ((ret = ff_flac_decode_frame_header(s->avctx, gb, &fi, 0)) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "invalid frame header\n");
return ret;
}
if (s->channels && fi.channels != s->channels && s->got_streaminfo) {
s->channels = s->avctx->channels = fi.channels;
ff_flac_set_channel_layout(s->avctx);
ret = allocate_buffers(s);
if (ret < 0)
return ret;
}
s->channels = s->avctx->channels = fi.channels;
if (!s->avctx->channel_layout)
ff_flac_set_channel_layout(s->avctx);
s->ch_mode = fi.ch_mode;
if (!s->bps && !fi.bps) {
av_log(s->avctx, AV_LOG_ERROR, "bps not found in STREAMINFO or frame header\n");
return AVERROR_INVALIDDATA;
}
if (!fi.bps) {
fi.bps = s->bps;
} else if (s->bps && fi.bps != s->bps) {
av_log(s->avctx, AV_LOG_ERROR, "switching bps mid-stream is not "
"supported\n");
return AVERROR_INVALIDDATA;
}
if (!s->bps) {
s->bps = s->avctx->bits_per_raw_sample = fi.bps;
flac_set_bps(s);
}
if (!s->max_blocksize)
s->max_blocksize = FLAC_MAX_BLOCKSIZE;
if (fi.blocksize > s->max_blocksize) {
av_log(s->avctx, AV_LOG_ERROR, "blocksize %d > %d\n", fi.blocksize,
s->max_blocksize);
return AVERROR_INVALIDDATA;
}
s->blocksize = fi.blocksize;
if (!s->samplerate && !fi.samplerate) {
av_log(s->avctx, AV_LOG_ERROR, "sample rate not found in STREAMINFO"
" or frame header\n");
return AVERROR_INVALIDDATA;
}
if (fi.samplerate == 0)
fi.samplerate = s->samplerate;
s->samplerate = s->avctx->sample_rate = fi.samplerate;
if (!s->got_streaminfo) {
ret = allocate_buffers(s);
if (ret < 0)
return ret;
ff_flacdsp_init(&s->dsp, s->avctx->sample_fmt, s->bps);
s->got_streaminfo = 1;
dump_headers(s->avctx, (FLACStreaminfo *)s);
}
// dump_headers(s->avctx, (FLACStreaminfo *)s);
/* subframes */
for (i = 0; i < s->channels; i++) {
if ((ret = decode_subframe(s, i)) < 0)
return ret;
}
align_get_bits(gb);
/* frame footer */
skip_bits(gb, 16); /* data crc */
return 0;
}
