diff options
| author | Justin Ruggles <justin.ruggles@gmail.com> | 2012-10-21 17:02:28 -0400 |
|---|---|---|
| committer | Justin Ruggles <justin.ruggles@gmail.com> | 2012-11-01 11:29:16 -0400 |
| commit | 90fcac0e95b7d266c148a86506f301a2072d9de3 (patch) | |
| tree | 3a98aa2c6d0bf7e22f78894dc5f308a7db0732d3 /libavcodec/flac.c | |
| parent | 268f8ba112570956f1d7be8f4f2f0bea86c61461 (diff) | |
flacdec: allow mid-stream channel layout change
Although the libFLAC decoder cannot handle such a change, it is allowed by the
spec and could potentially occur with live streams.
Diffstat (limited to 'libavcodec/flac.c')
| -rw-r--r-- | libavcodec/flac.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/libavcodec/flac.c b/libavcodec/flac.c index d624beb61f..07da702e94 100644 --- a/libavcodec/flac.c +++ b/libavcodec/flac.c @@ -19,6 +19,7 @@ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ +#include "libavutil/audioconvert.h" #include "libavutil/crc.h" #include "libavutil/log.h" #include "bytestream.h" @@ -28,6 +29,15 @@ static const int8_t sample_size_table[] = { 0, 8, 12, 0, 16, 20, 24, 0 }; +static const int64_t flac_channel_layouts[6] = { + AV_CH_LAYOUT_MONO, + AV_CH_LAYOUT_STEREO, + AV_CH_LAYOUT_SURROUND, + AV_CH_LAYOUT_QUAD, + AV_CH_LAYOUT_5POINT0, + AV_CH_LAYOUT_5POINT1 +}; + static int64_t get_utf8(GetBitContext *gb) { int64_t val; @@ -181,6 +191,14 @@ int avpriv_flac_is_extradata_valid(AVCodecContext *avctx, return 1; } +void ff_flac_set_channel_layout(AVCodecContext *avctx) +{ + if (avctx->channels <= FF_ARRAY_ELEMS(flac_channel_layouts)) + avctx->channel_layout = flac_channel_layouts[avctx->channels - 1]; + else + avctx->channel_layout = 0; +} + void avpriv_flac_parse_streaminfo(AVCodecContext *avctx, struct FLACStreaminfo *s, const uint8_t *buffer) { @@ -205,6 +223,7 @@ void avpriv_flac_parse_streaminfo(AVCodecContext *avctx, struct FLACStreaminfo * avctx->channels = s->channels; avctx->sample_rate = s->samplerate; avctx->bits_per_raw_sample = s->bps; + ff_flac_set_channel_layout(avctx); s->samples = get_bits_long(&gb, 32) << 4; s->samples |= get_bits(&gb, 4); |