[FFmpeg-devel] [PATCH 3/4] aac: define a new profile for USAC

[James Almer]

On 6/5/2024 12:08 AM, Lynne via ffmpeg-devel wrote:
> This allows users to determine whether a stream is USAC or not.
> ---
>   libavcodec/aac/aacdec_usac.c | 4 ++++
>   libavcodec/avcodec.h         | 1 +
>   libavcodec/defs.h            | 1 +
>   libavcodec/profiles.c        | 1 +
>   libavcodec/profiles.h        | 1 +
>   5 files changed, 8 insertions(+)
> 
> diff --git a/libavcodec/aac/aacdec_usac.c b/libavcodec/aac/aacdec_usac.c
> index 7b36b49d63..5c3bb8d4ac 100644
> --- a/libavcodec/aac/aacdec_usac.c
> +++ b/libavcodec/aac/aacdec_usac.c
> @@ -494,6 +494,8 @@ int ff_aac_usac_config_decode(AACDecContext *ac, AVCodecContext *avctx,
>           }
>       }
>   
> +    ac->avctx->profile = AV_PROFILE_AAC_USAC;
> +
>       ret = ff_aac_usac_reset_state(ac, oc);
>       if (ret < 0)
>           return ret;
> @@ -1533,6 +1535,8 @@ int ff_aac_usac_decode_frame(AVCodecContext *avctx, AACDecContext *ac,
>       ff_aac_output_configure(ac, ac->oc[1].layout_map, ac->oc[1].layout_map_tags,
>                               ac->oc[1].status, 0);
>   
> +    ac->avctx->profile = AV_PROFILE_AAC_USAC;
> +
>       indep_flag = get_bits1(gb);
>   
>       nb_ch_el = 0;
> diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
> index 2da63c87ea..257e04fe2d 100644
> --- a/libavcodec/avcodec.h
> +++ b/libavcodec/avcodec.h
> @@ -1652,6 +1652,7 @@ typedef struct AVCodecContext {
>   #define FF_PROFILE_AAC_HE_V2 28
>   #define FF_PROFILE_AAC_LD   22
>   #define FF_PROFILE_AAC_ELD  38
> +#define FF_PROFILE_AAC_USAC 41
>   #define FF_PROFILE_MPEG2_AAC_LOW 128
>   #define FF_PROFILE_MPEG2_AAC_HE  131
>   
> diff --git a/libavcodec/defs.h b/libavcodec/defs.h
> index 00d840ec19..7ddfdcad0b 100644
> --- a/libavcodec/defs.h
> +++ b/libavcodec/defs.h
> @@ -73,6 +73,7 @@
>   #define AV_PROFILE_AAC_HE_V2       28
>   #define AV_PROFILE_AAC_LD          22
>   #define AV_PROFILE_AAC_ELD         38
> +#define AV_PROFILE_AAC_USAC        41
>   #define AV_PROFILE_MPEG2_AAC_LOW  128
>   #define AV_PROFILE_MPEG2_AAC_HE   131
>   
> diff --git a/libavcodec/profiles.c b/libavcodec/profiles.c
> index 052b77926e..44bdf6f85b 100644
> --- a/libavcodec/profiles.c
> +++ b/libavcodec/profiles.c
> @@ -33,6 +33,7 @@ const AVProfile ff_aac_profiles[] = {
>       { AV_PROFILE_AAC_MAIN,  "Main" },
>       { AV_PROFILE_AAC_SSR,   "SSR"  },
>       { AV_PROFILE_AAC_LTP,   "LTP"  },
> +    { AV_PROFILE_AAC_USAC,  "xHE-AAC" },
>       { AV_PROFILE_UNKNOWN },
>   };
>   
> diff --git a/libavcodec/profiles.h b/libavcodec/profiles.h
> index 842201718b..33b7ffc17a 100644
> --- a/libavcodec/profiles.h
> +++ b/libavcodec/profiles.h
> @@ -35,6 +35,7 @@
>       FF_AVCTX_PROFILE_OPTION("aac_he_v2",     NULL, AUDIO, AV_PROFILE_AAC_HE_V2)\
>       FF_AVCTX_PROFILE_OPTION("aac_ld",        NULL, AUDIO, AV_PROFILE_AAC_LD)\
>       FF_AVCTX_PROFILE_OPTION("aac_eld",       NULL, AUDIO, AV_PROFILE_AAC_ELD)\
> +    FF_AVCTX_PROFILE_OPTION("aac_xhe",       NULL, AUDIO, AV_PROFILE_AAC_USAC)\
>       FF_AVCTX_PROFILE_OPTION("mpeg2_aac_low", NULL, AUDIO, AV_PROFILE_MPEG2_AAC_LOW)\
>       FF_AVCTX_PROFILE_OPTION("mpeg2_aac_he",  NULL, AUDIO, AV_PROFILE_MPEG2_AAC_HE)\

Should be ok without FF_PROFILE_AAC_USAC.