diff options
Diffstat (limited to 'libavcodec/aacenc.c')
| -rw-r--r-- | libavcodec/aacenc.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/libavcodec/aacenc.c b/libavcodec/aacenc.c index b51fccded3..66af2b1915 100644 --- a/libavcodec/aacenc.c +++ b/libavcodec/aacenc.c @@ -30,6 +30,7 @@ * add temporal noise shaping ***********************************/ +#include "libavutil/opt.h" #include "avcodec.h" #include "put_bits.h" #include "dsputil.h" @@ -489,7 +490,7 @@ static int aac_encode_frame(AVCodecContext *avctx, AACEncContext *s = avctx->priv_data; int16_t *samples = s->samples, *samples2, *la; ChannelElement *cpe; - int i, ch, w, chans, tag, start_ch; + int i, ch, w, g, chans, tag, start_ch; const uint8_t *chan_map = aac_chan_configs[avctx->channels-1]; int chan_el_counter[4]; FFPsyWindowInfo windows[AAC_MAX_CHANNELS]; @@ -587,8 +588,16 @@ static int aac_encode_frame(AVCodecContext *avctx, } } s->cur_channel = start_ch; - if (cpe->common_window && s->coder->search_for_ms) - s->coder->search_for_ms(s, cpe, s->lambda); + if (s->options.stereo_mode && cpe->common_window) { + if (s->options.stereo_mode > 0) { + IndividualChannelStream *ics = &cpe->ch[0].ics; + for (w = 0; w < ics->num_windows; w += ics->group_len[w]) + for (g = 0; g < ics->num_swb; g++) + cpe->ms_mask[w*16+g] = 1; + } else if (s->coder->search_for_ms) { + s->coder->search_for_ms(s, cpe, s->lambda); + } + } adjust_frame_information(s, cpe, chans); if (chans == 2) { put_bits(&s->pb, 1, cpe->common_window); @@ -645,6 +654,22 @@ static av_cold int aac_encode_end(AVCodecContext *avctx) return 0; } +#define AACENC_FLAGS AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM +static const AVOption aacenc_options[] = { + {"stereo_mode", "Stereo coding method", offsetof(AACEncContext, options.stereo_mode), FF_OPT_TYPE_INT, {.dbl = 0}, -1, 1, AACENC_FLAGS, "stereo_mode"}, + {"auto", "Selected by the Encoder", 0, FF_OPT_TYPE_CONST, {.dbl = -1 }, INT_MIN, INT_MAX, AACENC_FLAGS, "stereo_mode"}, + {"ms_off", "Disable Mid/Side coding", 0, FF_OPT_TYPE_CONST, {.dbl = 0 }, INT_MIN, INT_MAX, AACENC_FLAGS, "stereo_mode"}, + {"ms_force", "Force Mid/Side for the whole frame if possible", 0, FF_OPT_TYPE_CONST, {.dbl = 1 }, INT_MIN, INT_MAX, AACENC_FLAGS, "stereo_mode"}, + {NULL} +}; + +static const AVClass aacenc_class = { + "AAC encoder", + av_default_item_name, + aacenc_options, + LIBAVUTIL_VERSION_INT, +}; + AVCodec ff_aac_encoder = { "aac", AVMEDIA_TYPE_AUDIO, @@ -656,4 +681,5 @@ AVCodec ff_aac_encoder = { .capabilities = CODEC_CAP_SMALL_LAST_FRAME | CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL, .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE}, .long_name = NULL_IF_CONFIG_SMALL("Advanced Audio Coding"), + .priv_class = &aacenc_class, }; |