On Fri, Apr 22, 2011 at 10:19:44PM -0400, Justin Ruggles wrote:
> 
> Based on patches by clsid2 in ffdshow-tryout.
> 
> --- a/configure
> +++ b/configure
> @@ -95,6 +95,7 @@ Configuration options:
>    --disable-mpegaudio-hp   faster (but less accurate) MPEG audio decoding 
> [no]
> +  --enable-audio-float     floating-point output from some audio decoders 
> [no]

The comment is not very descriptive.

> --- a/libavcodec/aacdec.c
> +++ b/libavcodec/aacdec.c
> @@ -549,7 +549,11 @@ static av_cold int aac_decode_init(AVCodecContext *avctx)
>  
> +#if CONFIG_AUDIO_FLOAT
> +    avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
> +#else
>      avctx->sample_fmt = AV_SAMPLE_FMT_S16;
> +#endif

The code is now littered with these #if #else #endif blocks in many
places.  Maybe you can just set a few #defines at the top depending
on whether or not CONFIG_AUDIO_FLOAT is in effect or not and use
them below.  This would concentrate the #ifdeffery in one place.

> --- a/libavcodec/ac3dec.c
> +++ b/libavcodec/ac3dec.c
> @@ -1405,10 +1420,14 @@ static int ac3_decode_frame(AVCodecContext * avctx, 
> void *data, int *data_size,
> -    *data_size = s->num_blocks * 256 * avctx->channels * sizeof (int16_t);
> +    *data_size = s->num_blocks * 256 * avctx->channels * 
> sizeof(*out_samples);

unrelated?

> --- a/libavcodec/dca.c
> +++ b/libavcodec/dca.c
> @@ -1812,9 +1817,10 @@ static int dca_decode_frame(AVCodecContext * avctx,
>          return -1;
>      }
>  
> -    if (*data_size < (s->sample_blocks / 8) * 256 * sizeof(int16_t) * 
> channels)
> +    out_size = 256 / 8 * s->sample_blocks * sizeof(*samples) * channels;
> +    if (*data_size < out_size)
>          return -1;
> -    *data_size = 256 / 8 * s->sample_blocks * sizeof(int16_t) * channels;
> +    *data_size = out_size;

unrelated?

Diego
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