[FFmpeg-devel] [PATCH] avformat/sierravmd: Support for Shivers 2 stereo tracks

[Paul B Mahol]

On 2/18/17, Nicolas Roy-Renaud <nicolas.roy-renaud.1 at ens.etsmtl.ca> wrote:
> Signed-off-by: Nicolas Roy-Renaud <nicolas.roy-renaud.1 at ens.etsmtl.ca>
> ---
>  libavformat/sierravmd.c | 20 +++++++++++++-------
>  1 file changed, 13 insertions(+), 7 deletions(-)
>
> diff --git a/libavformat/sierravmd.c b/libavformat/sierravmd.c
> index 734a3f2c1e..6960c2868f 100644
> --- a/libavformat/sierravmd.c
> +++ b/libavformat/sierravmd.c
> @@ -142,13 +142,6 @@ static int vmd_read_header(AVFormatContext *s)
>          st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
>          st->codecpar->codec_id   = AV_CODEC_ID_VMDAUDIO;
>          st->codecpar->codec_tag  = 0;  /* no fourcc */
> -        if (vmd->vmd_header[811] & 0x80) {
> -            st->codecpar->channels       = 2;
> -            st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
> -        } else {
> -            st->codecpar->channels       = 1;
> -            st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
> -        }
>          st->codecpar->sample_rate = vmd->sample_rate;
>          st->codecpar->block_align = AV_RL16(&vmd->vmd_header[806]);
>          if (st->codecpar->block_align & 0x8000) {
> @@ -157,6 +150,19 @@ static int vmd_read_header(AVFormatContext *s)
>          } else {
>              st->codecpar->bits_per_coded_sample = 8;
>          }
> +        if (vmd->vmd_header[811] & 0x80) {
> +            st->codecpar->channels       = 2;
> +            st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
> +        } else if (vmd->vmd_header[811] & 0x2) {
> +            /* Shivers 2 stereo audio */
> +            /* Frame length is for 1 channel */
> +            st->codecpar->channels       = 2;
> +            st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
> +            st->codecpar->block_align = st->codecpar->block_align << 1;
> +        } else {
> +            st->codecpar->channels       = 1;
> +            st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
> +        }
>          st->codecpar->bit_rate = st->codecpar->sample_rate *
>              st->codecpar->bits_per_coded_sample * st->codecpar->channels;
>
> --
> 2.11.0
>
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lgtm