static av_cold int aac_encode_init(AVCodecContext *avctx) { AACEncContext *s = avctx->priv_data; int i; const uint8_t *sizes[2]; int lengths[2]; avctx->frame_size = 1024; for (i = 0; i < 16; i++) if (avctx->sample_rate == ff_mpeg4audio_sample_rates[i]) break; if (i == 16) { av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate %d\n", avctx->sample_rate); return -1; } if (avctx->channels > AAC_MAX_CHANNELS) { av_log(avctx, AV_LOG_ERROR, "Unsupported number of channels: %d\n", avctx->channels); return -1; } if (avctx->profile != FF_PROFILE_UNKNOWN && avctx->profile != FF_PROFILE_AAC_LOW) { av_log(avctx, AV_LOG_ERROR, "Unsupported profile %d\n", avctx->profile); return -1; } if (1024.0 * avctx->bit_rate / avctx->sample_rate > 6144 * avctx->channels) { av_log(avctx, AV_LOG_ERROR, "Too many bits per frame requested\n"); return -1; } s->samplerate_index = i; dsputil_init(&s->dsp, avctx); ff_mdct_init(&s->mdct1024, 11, 0, 1.0); ff_mdct_init(&s->mdct128, 8, 0, 1.0); // window init ff_kbd_window_init(ff_aac_kbd_long_1024, 4.0, 1024); ff_kbd_window_init(ff_aac_kbd_short_128, 6.0, 128); ff_init_ff_sine_windows(10); ff_init_ff_sine_windows(7); s->chan_map = aac_chan_configs[avctx->channels-1]; s->samples = av_malloc(2 * 1024 * avctx->channels * sizeof(s->samples[0])); s->cpe = av_mallocz(sizeof(ChannelElement) * s->chan_map[0]); avctx->extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE); avctx->extradata_size = 5; put_audio_specific_config(avctx); sizes[0] = swb_size_1024[i]; sizes[1] = swb_size_128[i]; lengths[0] = ff_aac_num_swb_1024[i]; lengths[1] = ff_aac_num_swb_128[i]; ff_psy_init(&s->psy, avctx, 2, sizes, lengths, s->chan_map[0], &s->chan_map[1]); s->psypp = ff_psy_preprocess_init(avctx); s->coder = &ff_aac_coders[2]; s->lambda = avctx->global_quality ? avctx->global_quality : 120; ff_aac_tableinit(); return 0; }
int main(void) { ff_aac_tableinit(); write_fileheader(); WRITE_ARRAY("const", float, ff_aac_pow2sf_tab); return 0; }
static av_cold void aac_encode_init_tables(void) { ff_aac_tableinit(); }
static av_cold int aac_encode_init(AVCodecContext *avctx) { AACEncContext *s = avctx->priv_data; int i, ret = 0; const uint8_t *sizes[2]; uint8_t grouping[AAC_MAX_CHANNELS]; int lengths[2]; avctx->frame_size = 1024; for (i = 0; i < 16; i++) if (avctx->sample_rate == avpriv_mpeg4audio_sample_rates[i]) break; s->channels = avctx->channels; ERROR_IF(i == 16, "Unsupported sample rate %d\n", avctx->sample_rate); ERROR_IF(s->channels > AAC_MAX_CHANNELS, "Unsupported number of channels: %d\n", s->channels); ERROR_IF(avctx->profile != FF_PROFILE_UNKNOWN && avctx->profile != FF_PROFILE_AAC_LOW, "Unsupported profile %d\n", avctx->profile); ERROR_IF(1024.0 * avctx->bit_rate / avctx->sample_rate > 6144 * s->channels, "Too many bits per frame requested\n"); s->samplerate_index = i; s->chan_map = aac_chan_configs[s->channels-1]; if (ret = dsp_init(avctx, s)) goto fail; if (ret = alloc_buffers(avctx, s)) goto fail; avctx->extradata_size = 5; put_audio_specific_config(avctx); sizes[0] = swb_size_1024[i]; sizes[1] = swb_size_128[i]; lengths[0] = ff_aac_num_swb_1024[i]; lengths[1] = ff_aac_num_swb_128[i]; for (i = 0; i < s->chan_map[0]; i++) grouping[i] = s->chan_map[i + 1] == TYPE_CPE; if (ret = ff_psy_init(&s->psy, avctx, 2, sizes, lengths, s->chan_map[0], grouping)) goto fail; s->psypp = ff_psy_preprocess_init(avctx); s->coder = &ff_aac_coders[s->options.aac_coder]; if (HAVE_MIPSDSPR1) ff_aac_coder_init_mips(s); s->lambda = avctx->global_quality ? avctx->global_quality : 120; ff_aac_tableinit(); for (i = 0; i < 428; i++) ff_aac_pow34sf_tab[i] = sqrt(ff_aac_pow2sf_tab[i] * sqrt(ff_aac_pow2sf_tab[i])); avctx->delay = 1024; ff_af_queue_init(avctx, &s->afq); return 0; fail: aac_encode_end(avctx); return ret; }
static av_cold int aac_decode_init(AVCodecContext *avctx) { AACContext *ac = avctx->priv_data; ac->avctx = avctx; ac->m4ac.sample_rate = avctx->sample_rate; if (avctx->extradata_size > 0) { if (decode_audio_specific_config(ac, avctx->extradata, avctx->extradata_size)) return -1; } avctx->sample_fmt = SAMPLE_FMT_S16; AAC_INIT_VLC_STATIC( 0, 304); AAC_INIT_VLC_STATIC( 1, 270); AAC_INIT_VLC_STATIC( 2, 550); AAC_INIT_VLC_STATIC( 3, 300); AAC_INIT_VLC_STATIC( 4, 328); AAC_INIT_VLC_STATIC( 5, 294); AAC_INIT_VLC_STATIC( 6, 306); AAC_INIT_VLC_STATIC( 7, 268); AAC_INIT_VLC_STATIC( 8, 510); AAC_INIT_VLC_STATIC( 9, 366); AAC_INIT_VLC_STATIC(10, 462); ff_aac_sbr_init(); dsputil_init(&ac->dsp, avctx); ac->random_state = 0x1f2e3d4c; // -1024 - Compensate wrong IMDCT method. // 32768 - Required to scale values to the correct range for the bias method // for float to int16 conversion. if (ac->dsp.float_to_int16_interleave == ff_float_to_int16_interleave_c) { ac->add_bias = 385.0f; ac->sf_scale = 1. / (-1024. * 32768.); ac->sf_offset = 0; } else { ac->add_bias = 0.0f; ac->sf_scale = 1. / -1024.; ac->sf_offset = 60; } ff_aac_tableinit(); INIT_VLC_STATIC(&vlc_scalefactors,7,FF_ARRAY_ELEMS(ff_aac_scalefactor_code), ff_aac_scalefactor_bits, sizeof(ff_aac_scalefactor_bits[0]), sizeof(ff_aac_scalefactor_bits[0]), ff_aac_scalefactor_code, sizeof(ff_aac_scalefactor_code[0]), sizeof(ff_aac_scalefactor_code[0]), 352); ff_mdct_init(&ac->mdct, 11, 1, 1.0); ff_mdct_init(&ac->mdct_small, 8, 1, 1.0); // window initialization ff_kbd_window_init(ff_aac_kbd_long_1024, 4.0, 1024); ff_kbd_window_init(ff_aac_kbd_short_128, 6.0, 128); ff_init_ff_sine_windows(10); ff_init_ff_sine_windows( 7); cbrt_tableinit(); return 0; }