yading@10: /* yading@10: * AAC encoder yading@10: * Copyright (C) 2008 Konstantin Shishkov yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * AAC encoder yading@10: */ yading@10: yading@10: /*********************************** yading@10: * TODOs: yading@10: * add sane pulse detection yading@10: * add temporal noise shaping yading@10: ***********************************/ yading@10: yading@10: #include "libavutil/float_dsp.h" yading@10: #include "libavutil/opt.h" yading@10: #include "avcodec.h" yading@10: #include "put_bits.h" yading@10: #include "internal.h" yading@10: #include "mpeg4audio.h" yading@10: #include "kbdwin.h" yading@10: #include "sinewin.h" yading@10: yading@10: #include "aac.h" yading@10: #include "aactab.h" yading@10: #include "aacenc.h" yading@10: yading@10: #include "psymodel.h" yading@10: yading@10: #define AAC_MAX_CHANNELS 6 yading@10: yading@10: #define ERROR_IF(cond, ...) \ yading@10: if (cond) { \ yading@10: av_log(avctx, AV_LOG_ERROR, __VA_ARGS__); \ yading@10: return AVERROR(EINVAL); \ yading@10: } yading@10: yading@10: float ff_aac_pow34sf_tab[428]; yading@10: yading@10: static const uint8_t swb_size_1024_96[] = { yading@10: 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 8, yading@10: 12, 12, 12, 12, 12, 16, 16, 24, 28, 36, 44, yading@10: 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64 yading@10: }; yading@10: yading@10: static const uint8_t swb_size_1024_64[] = { yading@10: 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, yading@10: 12, 12, 12, 16, 16, 16, 20, 24, 24, 28, 36, yading@10: 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40 yading@10: }; yading@10: yading@10: static const uint8_t swb_size_1024_48[] = { yading@10: 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 8, 8, 8, yading@10: 12, 12, 12, 12, 16, 16, 20, 20, 24, 24, 28, 28, yading@10: 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, yading@10: 96 yading@10: }; yading@10: yading@10: static const uint8_t swb_size_1024_32[] = { yading@10: 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 8, 8, 8, yading@10: 12, 12, 12, 12, 16, 16, 20, 20, 24, 24, 28, 28, yading@10: 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32 yading@10: }; yading@10: yading@10: static const uint8_t swb_size_1024_24[] = { yading@10: 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, yading@10: 12, 12, 12, 12, 16, 16, 16, 20, 20, 24, 24, 28, 28, yading@10: 32, 36, 36, 40, 44, 48, 52, 52, 64, 64, 64, 64, 64 yading@10: }; yading@10: yading@10: static const uint8_t swb_size_1024_16[] = { yading@10: 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, yading@10: 12, 12, 12, 12, 12, 12, 12, 12, 12, 16, 16, 16, 16, 20, 20, 20, 24, 24, 28, 28, yading@10: 32, 36, 40, 40, 44, 48, 52, 56, 60, 64, 64, 64 yading@10: }; yading@10: yading@10: static const uint8_t swb_size_1024_8[] = { yading@10: 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, yading@10: 16, 16, 16, 16, 16, 16, 16, 20, 20, 20, 20, 24, 24, 24, 28, 28, yading@10: 32, 36, 36, 40, 44, 48, 52, 56, 60, 64, 80 yading@10: }; yading@10: yading@10: static const uint8_t *swb_size_1024[] = { yading@10: swb_size_1024_96, swb_size_1024_96, swb_size_1024_64, yading@10: swb_size_1024_48, swb_size_1024_48, swb_size_1024_32, yading@10: swb_size_1024_24, swb_size_1024_24, swb_size_1024_16, yading@10: swb_size_1024_16, swb_size_1024_16, swb_size_1024_8 yading@10: }; yading@10: yading@10: static const uint8_t swb_size_128_96[] = { yading@10: 4, 4, 4, 4, 4, 4, 8, 8, 8, 16, 28, 36 yading@10: }; yading@10: yading@10: static const uint8_t swb_size_128_48[] = { yading@10: 4, 4, 4, 4, 4, 8, 8, 8, 12, 12, 12, 16, 16, 16 yading@10: }; yading@10: yading@10: static const uint8_t swb_size_128_24[] = { yading@10: 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 12, 12, 16, 16, 20 yading@10: }; yading@10: yading@10: static const uint8_t swb_size_128_16[] = { yading@10: 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 12, 12, 16, 20, 20 yading@10: }; yading@10: yading@10: static const uint8_t swb_size_128_8[] = { yading@10: 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 12, 16, 20, 20 yading@10: }; yading@10: yading@10: static const uint8_t *swb_size_128[] = { yading@10: /* the last entry on the following row is swb_size_128_64 but is a yading@10: duplicate of swb_size_128_96 */ yading@10: swb_size_128_96, swb_size_128_96, swb_size_128_96, yading@10: swb_size_128_48, swb_size_128_48, swb_size_128_48, yading@10: swb_size_128_24, swb_size_128_24, swb_size_128_16, yading@10: swb_size_128_16, swb_size_128_16, swb_size_128_8 yading@10: }; yading@10: yading@10: /** default channel configurations */ yading@10: static const uint8_t aac_chan_configs[6][5] = { yading@10: {1, TYPE_SCE}, // 1 channel - single channel element yading@10: {1, TYPE_CPE}, // 2 channels - channel pair yading@10: {2, TYPE_SCE, TYPE_CPE}, // 3 channels - center + stereo yading@10: {3, TYPE_SCE, TYPE_CPE, TYPE_SCE}, // 4 channels - front center + stereo + back center yading@10: {3, TYPE_SCE, TYPE_CPE, TYPE_CPE}, // 5 channels - front center + stereo + back stereo yading@10: {4, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_LFE}, // 6 channels - front center + stereo + back stereo + LFE yading@10: }; yading@10: yading@10: /** yading@10: * Table to remap channels from libavcodec's default order to AAC order. yading@10: */ yading@10: static const uint8_t aac_chan_maps[AAC_MAX_CHANNELS][AAC_MAX_CHANNELS] = { yading@10: { 0 }, yading@10: { 0, 1 }, yading@10: { 2, 0, 1 }, yading@10: { 2, 0, 1, 3 }, yading@10: { 2, 0, 1, 3, 4 }, yading@10: { 2, 0, 1, 4, 5, 3 }, yading@10: }; yading@10: yading@10: /** yading@10: * Make AAC audio config object. yading@10: * @see 1.6.2.1 "Syntax - AudioSpecificConfig" yading@10: */ yading@10: static void put_audio_specific_config(AVCodecContext *avctx) yading@10: { yading@10: PutBitContext pb; yading@10: AACEncContext *s = avctx->priv_data; yading@10: yading@10: init_put_bits(&pb, avctx->extradata, avctx->extradata_size*8); yading@10: put_bits(&pb, 5, 2); //object type - AAC-LC yading@10: put_bits(&pb, 4, s->samplerate_index); //sample rate index yading@10: put_bits(&pb, 4, s->channels); yading@10: //GASpecificConfig yading@10: put_bits(&pb, 1, 0); //frame length - 1024 samples yading@10: put_bits(&pb, 1, 0); //does not depend on core coder yading@10: put_bits(&pb, 1, 0); //is not extension yading@10: yading@10: //Explicitly Mark SBR absent yading@10: put_bits(&pb, 11, 0x2b7); //sync extension yading@10: put_bits(&pb, 5, AOT_SBR); yading@10: put_bits(&pb, 1, 0); yading@10: flush_put_bits(&pb); yading@10: } yading@10: yading@10: #define WINDOW_FUNC(type) \ yading@10: static void apply_ ##type ##_window(AVFloatDSPContext *fdsp, \ yading@10: SingleChannelElement *sce, \ yading@10: const float *audio) yading@10: yading@10: WINDOW_FUNC(only_long) yading@10: { yading@10: const float *lwindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_long_1024 : ff_sine_1024; yading@10: const float *pwindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_long_1024 : ff_sine_1024; yading@10: float *out = sce->ret_buf; yading@10: yading@10: fdsp->vector_fmul (out, audio, lwindow, 1024); yading@10: fdsp->vector_fmul_reverse(out + 1024, audio + 1024, pwindow, 1024); yading@10: } yading@10: yading@10: WINDOW_FUNC(long_start) yading@10: { yading@10: const float *lwindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_long_1024 : ff_sine_1024; yading@10: const float *swindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128; yading@10: float *out = sce->ret_buf; yading@10: yading@10: fdsp->vector_fmul(out, audio, lwindow, 1024); yading@10: memcpy(out + 1024, audio + 1024, sizeof(out[0]) * 448); yading@10: fdsp->vector_fmul_reverse(out + 1024 + 448, audio + 1024 + 448, swindow, 128); yading@10: memset(out + 1024 + 576, 0, sizeof(out[0]) * 448); yading@10: } yading@10: yading@10: WINDOW_FUNC(long_stop) yading@10: { yading@10: const float *lwindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_long_1024 : ff_sine_1024; yading@10: const float *swindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_short_128 : ff_sine_128; yading@10: float *out = sce->ret_buf; yading@10: yading@10: memset(out, 0, sizeof(out[0]) * 448); yading@10: fdsp->vector_fmul(out + 448, audio + 448, swindow, 128); yading@10: memcpy(out + 576, audio + 576, sizeof(out[0]) * 448); yading@10: fdsp->vector_fmul_reverse(out + 1024, audio + 1024, lwindow, 1024); yading@10: } yading@10: yading@10: WINDOW_FUNC(eight_short) yading@10: { yading@10: const float *swindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128; yading@10: const float *pwindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_short_128 : ff_sine_128; yading@10: const float *in = audio + 448; yading@10: float *out = sce->ret_buf; yading@10: int w; yading@10: yading@10: for (w = 0; w < 8; w++) { yading@10: fdsp->vector_fmul (out, in, w ? pwindow : swindow, 128); yading@10: out += 128; yading@10: in += 128; yading@10: fdsp->vector_fmul_reverse(out, in, swindow, 128); yading@10: out += 128; yading@10: } yading@10: } yading@10: yading@10: static void (*const apply_window[4])(AVFloatDSPContext *fdsp, yading@10: SingleChannelElement *sce, yading@10: const float *audio) = { yading@10: [ONLY_LONG_SEQUENCE] = apply_only_long_window, yading@10: [LONG_START_SEQUENCE] = apply_long_start_window, yading@10: [EIGHT_SHORT_SEQUENCE] = apply_eight_short_window, yading@10: [LONG_STOP_SEQUENCE] = apply_long_stop_window yading@10: }; yading@10: yading@10: static void apply_window_and_mdct(AACEncContext *s, SingleChannelElement *sce, yading@10: float *audio) yading@10: { yading@10: int i; yading@10: float *output = sce->ret_buf; yading@10: yading@10: apply_window[sce->ics.window_sequence[0]](&s->fdsp, sce, audio); yading@10: yading@10: if (sce->ics.window_sequence[0] != EIGHT_SHORT_SEQUENCE) yading@10: s->mdct1024.mdct_calc(&s->mdct1024, sce->coeffs, output); yading@10: else yading@10: for (i = 0; i < 1024; i += 128) yading@10: s->mdct128.mdct_calc(&s->mdct128, sce->coeffs + i, output + i*2); yading@10: memcpy(audio, audio + 1024, sizeof(audio[0]) * 1024); yading@10: } yading@10: yading@10: /** yading@10: * Encode ics_info element. yading@10: * @see Table 4.6 (syntax of ics_info) yading@10: */ yading@10: static void put_ics_info(AACEncContext *s, IndividualChannelStream *info) yading@10: { yading@10: int w; yading@10: yading@10: put_bits(&s->pb, 1, 0); // ics_reserved bit yading@10: put_bits(&s->pb, 2, info->window_sequence[0]); yading@10: put_bits(&s->pb, 1, info->use_kb_window[0]); yading@10: if (info->window_sequence[0] != EIGHT_SHORT_SEQUENCE) { yading@10: put_bits(&s->pb, 6, info->max_sfb); yading@10: put_bits(&s->pb, 1, 0); // no prediction yading@10: } else { yading@10: put_bits(&s->pb, 4, info->max_sfb); yading@10: for (w = 1; w < 8; w++) yading@10: put_bits(&s->pb, 1, !info->group_len[w]); yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * Encode MS data. yading@10: * @see 4.6.8.1 "Joint Coding - M/S Stereo" yading@10: */ yading@10: static void encode_ms_info(PutBitContext *pb, ChannelElement *cpe) yading@10: { yading@10: int i, w; yading@10: yading@10: put_bits(pb, 2, cpe->ms_mode); yading@10: if (cpe->ms_mode == 1) yading@10: for (w = 0; w < cpe->ch[0].ics.num_windows; w += cpe->ch[0].ics.group_len[w]) yading@10: for (i = 0; i < cpe->ch[0].ics.max_sfb; i++) yading@10: put_bits(pb, 1, cpe->ms_mask[w*16 + i]); yading@10: } yading@10: yading@10: /** yading@10: * Produce integer coefficients from scalefactors provided by the model. yading@10: */ yading@10: static void adjust_frame_information(ChannelElement *cpe, int chans) yading@10: { yading@10: int i, w, w2, g, ch; yading@10: int start, maxsfb, cmaxsfb; yading@10: yading@10: for (ch = 0; ch < chans; ch++) { yading@10: IndividualChannelStream *ics = &cpe->ch[ch].ics; yading@10: start = 0; yading@10: maxsfb = 0; yading@10: cpe->ch[ch].pulse.num_pulse = 0; yading@10: for (w = 0; w < ics->num_windows*16; w += 16) { yading@10: for (g = 0; g < ics->num_swb; g++) { yading@10: //apply M/S yading@10: if (cpe->common_window && !ch && cpe->ms_mask[w + g]) { yading@10: for (i = 0; i < ics->swb_sizes[g]; i++) { yading@10: cpe->ch[0].coeffs[start+i] = (cpe->ch[0].coeffs[start+i] + cpe->ch[1].coeffs[start+i]) / 2.0; yading@10: cpe->ch[1].coeffs[start+i] = cpe->ch[0].coeffs[start+i] - cpe->ch[1].coeffs[start+i]; yading@10: } yading@10: } yading@10: start += ics->swb_sizes[g]; yading@10: } yading@10: for (cmaxsfb = ics->num_swb; cmaxsfb > 0 && cpe->ch[ch].zeroes[w+cmaxsfb-1]; cmaxsfb--) yading@10: ; yading@10: maxsfb = FFMAX(maxsfb, cmaxsfb); yading@10: } yading@10: ics->max_sfb = maxsfb; yading@10: yading@10: //adjust zero bands for window groups yading@10: for (w = 0; w < ics->num_windows; w += ics->group_len[w]) { yading@10: for (g = 0; g < ics->max_sfb; g++) { yading@10: i = 1; yading@10: for (w2 = w; w2 < w + ics->group_len[w]; w2++) { yading@10: if (!cpe->ch[ch].zeroes[w2*16 + g]) { yading@10: i = 0; yading@10: break; yading@10: } yading@10: } yading@10: cpe->ch[ch].zeroes[w*16 + g] = i; yading@10: } yading@10: } yading@10: } yading@10: yading@10: if (chans > 1 && cpe->common_window) { yading@10: IndividualChannelStream *ics0 = &cpe->ch[0].ics; yading@10: IndividualChannelStream *ics1 = &cpe->ch[1].ics; yading@10: int msc = 0; yading@10: ics0->max_sfb = FFMAX(ics0->max_sfb, ics1->max_sfb); yading@10: ics1->max_sfb = ics0->max_sfb; yading@10: for (w = 0; w < ics0->num_windows*16; w += 16) yading@10: for (i = 0; i < ics0->max_sfb; i++) yading@10: if (cpe->ms_mask[w+i]) yading@10: msc++; yading@10: if (msc == 0 || ics0->max_sfb == 0) yading@10: cpe->ms_mode = 0; yading@10: else yading@10: cpe->ms_mode = msc < ics0->max_sfb * ics0->num_windows ? 1 : 2; yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * Encode scalefactor band coding type. yading@10: */ yading@10: static void encode_band_info(AACEncContext *s, SingleChannelElement *sce) yading@10: { yading@10: int w; yading@10: yading@10: for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) yading@10: s->coder->encode_window_bands_info(s, sce, w, sce->ics.group_len[w], s->lambda); yading@10: } yading@10: yading@10: /** yading@10: * Encode scalefactors. yading@10: */ yading@10: static void encode_scale_factors(AVCodecContext *avctx, AACEncContext *s, yading@10: SingleChannelElement *sce) yading@10: { yading@10: int off = sce->sf_idx[0], diff; yading@10: int i, w; yading@10: yading@10: for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { yading@10: for (i = 0; i < sce->ics.max_sfb; i++) { yading@10: if (!sce->zeroes[w*16 + i]) { yading@10: diff = sce->sf_idx[w*16 + i] - off + SCALE_DIFF_ZERO; yading@10: av_assert0(diff >= 0 && diff <= 120); yading@10: off = sce->sf_idx[w*16 + i]; yading@10: put_bits(&s->pb, ff_aac_scalefactor_bits[diff], ff_aac_scalefactor_code[diff]); yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * Encode pulse data. yading@10: */ yading@10: static void encode_pulses(AACEncContext *s, Pulse *pulse) yading@10: { yading@10: int i; yading@10: yading@10: put_bits(&s->pb, 1, !!pulse->num_pulse); yading@10: if (!pulse->num_pulse) yading@10: return; yading@10: yading@10: put_bits(&s->pb, 2, pulse->num_pulse - 1); yading@10: put_bits(&s->pb, 6, pulse->start); yading@10: for (i = 0; i < pulse->num_pulse; i++) { yading@10: put_bits(&s->pb, 5, pulse->pos[i]); yading@10: put_bits(&s->pb, 4, pulse->amp[i]); yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * Encode spectral coefficients processed by psychoacoustic model. yading@10: */ yading@10: static void encode_spectral_coeffs(AACEncContext *s, SingleChannelElement *sce) yading@10: { yading@10: int start, i, w, w2; yading@10: yading@10: for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { yading@10: start = 0; yading@10: for (i = 0; i < sce->ics.max_sfb; i++) { yading@10: if (sce->zeroes[w*16 + i]) { yading@10: start += sce->ics.swb_sizes[i]; yading@10: continue; yading@10: } yading@10: for (w2 = w; w2 < w + sce->ics.group_len[w]; w2++) yading@10: s->coder->quantize_and_encode_band(s, &s->pb, sce->coeffs + start + w2*128, yading@10: sce->ics.swb_sizes[i], yading@10: sce->sf_idx[w*16 + i], yading@10: sce->band_type[w*16 + i], yading@10: s->lambda); yading@10: start += sce->ics.swb_sizes[i]; yading@10: } yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * Encode one channel of audio data. yading@10: */ yading@10: static int encode_individual_channel(AVCodecContext *avctx, AACEncContext *s, yading@10: SingleChannelElement *sce, yading@10: int common_window) yading@10: { yading@10: put_bits(&s->pb, 8, sce->sf_idx[0]); yading@10: if (!common_window) yading@10: put_ics_info(s, &sce->ics); yading@10: encode_band_info(s, sce); yading@10: encode_scale_factors(avctx, s, sce); yading@10: encode_pulses(s, &sce->pulse); yading@10: put_bits(&s->pb, 1, 0); //tns yading@10: put_bits(&s->pb, 1, 0); //ssr yading@10: encode_spectral_coeffs(s, sce); yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Write some auxiliary information about the created AAC file. yading@10: */ yading@10: static void put_bitstream_info(AACEncContext *s, const char *name) yading@10: { yading@10: int i, namelen, padbits; yading@10: yading@10: namelen = strlen(name) + 2; yading@10: put_bits(&s->pb, 3, TYPE_FIL); yading@10: put_bits(&s->pb, 4, FFMIN(namelen, 15)); yading@10: if (namelen >= 15) yading@10: put_bits(&s->pb, 8, namelen - 14); yading@10: put_bits(&s->pb, 4, 0); //extension type - filler yading@10: padbits = -put_bits_count(&s->pb) & 7; yading@10: avpriv_align_put_bits(&s->pb); yading@10: for (i = 0; i < namelen - 2; i++) yading@10: put_bits(&s->pb, 8, name[i]); yading@10: put_bits(&s->pb, 12 - padbits, 0); yading@10: } yading@10: yading@10: /* yading@10: * Copy input samples. yading@10: * Channels are reordered from libavcodec's default order to AAC order. yading@10: */ yading@10: static void copy_input_samples(AACEncContext *s, const AVFrame *frame) yading@10: { yading@10: int ch; yading@10: int end = 2048 + (frame ? frame->nb_samples : 0); yading@10: const uint8_t *channel_map = aac_chan_maps[s->channels - 1]; yading@10: yading@10: /* copy and remap input samples */ yading@10: for (ch = 0; ch < s->channels; ch++) { yading@10: /* copy last 1024 samples of previous frame to the start of the current frame */ yading@10: memcpy(&s->planar_samples[ch][1024], &s->planar_samples[ch][2048], 1024 * sizeof(s->planar_samples[0][0])); yading@10: yading@10: /* copy new samples and zero any remaining samples */ yading@10: if (frame) { yading@10: memcpy(&s->planar_samples[ch][2048], yading@10: frame->extended_data[channel_map[ch]], yading@10: frame->nb_samples * sizeof(s->planar_samples[0][0])); yading@10: } yading@10: memset(&s->planar_samples[ch][end], 0, yading@10: (3072 - end) * sizeof(s->planar_samples[0][0])); yading@10: } yading@10: } yading@10: yading@10: static int aac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, yading@10: const AVFrame *frame, int *got_packet_ptr) yading@10: { yading@10: AACEncContext *s = avctx->priv_data; yading@10: float **samples = s->planar_samples, *samples2, *la, *overlap; yading@10: ChannelElement *cpe; yading@10: int i, ch, w, g, chans, tag, start_ch, ret; yading@10: int chan_el_counter[4]; yading@10: FFPsyWindowInfo windows[AAC_MAX_CHANNELS]; yading@10: yading@10: if (s->last_frame == 2) yading@10: return 0; yading@10: yading@10: /* add current frame to queue */ yading@10: if (frame) { yading@10: if ((ret = ff_af_queue_add(&s->afq, frame)) < 0) yading@10: return ret; yading@10: } yading@10: yading@10: copy_input_samples(s, frame); yading@10: if (s->psypp) yading@10: ff_psy_preprocess(s->psypp, s->planar_samples, s->channels); yading@10: yading@10: if (!avctx->frame_number) yading@10: return 0; yading@10: yading@10: start_ch = 0; yading@10: for (i = 0; i < s->chan_map[0]; i++) { yading@10: FFPsyWindowInfo* wi = windows + start_ch; yading@10: tag = s->chan_map[i+1]; yading@10: chans = tag == TYPE_CPE ? 2 : 1; yading@10: cpe = &s->cpe[i]; yading@10: for (ch = 0; ch < chans; ch++) { yading@10: IndividualChannelStream *ics = &cpe->ch[ch].ics; yading@10: int cur_channel = start_ch + ch; yading@10: overlap = &samples[cur_channel][0]; yading@10: samples2 = overlap + 1024; yading@10: la = samples2 + (448+64); yading@10: if (!frame) yading@10: la = NULL; yading@10: if (tag == TYPE_LFE) { yading@10: wi[ch].window_type[0] = ONLY_LONG_SEQUENCE; yading@10: wi[ch].window_shape = 0; yading@10: wi[ch].num_windows = 1; yading@10: wi[ch].grouping[0] = 1; yading@10: yading@10: /* Only the lowest 12 coefficients are used in a LFE channel. yading@10: * The expression below results in only the bottom 8 coefficients yading@10: * being used for 11.025kHz to 16kHz sample rates. yading@10: */ yading@10: ics->num_swb = s->samplerate_index >= 8 ? 1 : 3; yading@10: } else { yading@10: wi[ch] = s->psy.model->window(&s->psy, samples2, la, cur_channel, yading@10: ics->window_sequence[0]); yading@10: } yading@10: ics->window_sequence[1] = ics->window_sequence[0]; yading@10: ics->window_sequence[0] = wi[ch].window_type[0]; yading@10: ics->use_kb_window[1] = ics->use_kb_window[0]; yading@10: ics->use_kb_window[0] = wi[ch].window_shape; yading@10: ics->num_windows = wi[ch].num_windows; yading@10: ics->swb_sizes = s->psy.bands [ics->num_windows == 8]; yading@10: ics->num_swb = tag == TYPE_LFE ? ics->num_swb : s->psy.num_bands[ics->num_windows == 8]; yading@10: for (w = 0; w < ics->num_windows; w++) yading@10: ics->group_len[w] = wi[ch].grouping[w]; yading@10: yading@10: apply_window_and_mdct(s, &cpe->ch[ch], overlap); yading@10: } yading@10: start_ch += chans; yading@10: } yading@10: if ((ret = ff_alloc_packet2(avctx, avpkt, 8192 * s->channels)) < 0) yading@10: return ret; yading@10: do { yading@10: int frame_bits; yading@10: yading@10: init_put_bits(&s->pb, avpkt->data, avpkt->size); yading@10: yading@10: if ((avctx->frame_number & 0xFF)==1 && !(avctx->flags & CODEC_FLAG_BITEXACT)) yading@10: put_bitstream_info(s, LIBAVCODEC_IDENT); yading@10: start_ch = 0; yading@10: memset(chan_el_counter, 0, sizeof(chan_el_counter)); yading@10: for (i = 0; i < s->chan_map[0]; i++) { yading@10: FFPsyWindowInfo* wi = windows + start_ch; yading@10: const float *coeffs[2]; yading@10: tag = s->chan_map[i+1]; yading@10: chans = tag == TYPE_CPE ? 2 : 1; yading@10: cpe = &s->cpe[i]; yading@10: put_bits(&s->pb, 3, tag); yading@10: put_bits(&s->pb, 4, chan_el_counter[tag]++); yading@10: for (ch = 0; ch < chans; ch++) yading@10: coeffs[ch] = cpe->ch[ch].coeffs; yading@10: s->psy.model->analyze(&s->psy, start_ch, coeffs, wi); yading@10: for (ch = 0; ch < chans; ch++) { yading@10: s->cur_channel = start_ch * 2 + ch; yading@10: s->coder->search_for_quantizers(avctx, s, &cpe->ch[ch], s->lambda); yading@10: } yading@10: cpe->common_window = 0; yading@10: if (chans > 1 yading@10: && wi[0].window_type[0] == wi[1].window_type[0] yading@10: && wi[0].window_shape == wi[1].window_shape) { yading@10: yading@10: cpe->common_window = 1; yading@10: for (w = 0; w < wi[0].num_windows; w++) { yading@10: if (wi[0].grouping[w] != wi[1].grouping[w]) { yading@10: cpe->common_window = 0; yading@10: break; yading@10: } yading@10: } yading@10: } yading@10: s->cur_channel = start_ch * 2; yading@10: if (s->options.stereo_mode && cpe->common_window) { yading@10: if (s->options.stereo_mode > 0) { yading@10: IndividualChannelStream *ics = &cpe->ch[0].ics; yading@10: for (w = 0; w < ics->num_windows; w += ics->group_len[w]) yading@10: for (g = 0; g < ics->num_swb; g++) yading@10: cpe->ms_mask[w*16+g] = 1; yading@10: } else if (s->coder->search_for_ms) { yading@10: s->coder->search_for_ms(s, cpe, s->lambda); yading@10: } yading@10: } yading@10: adjust_frame_information(cpe, chans); yading@10: if (chans == 2) { yading@10: put_bits(&s->pb, 1, cpe->common_window); yading@10: if (cpe->common_window) { yading@10: put_ics_info(s, &cpe->ch[0].ics); yading@10: encode_ms_info(&s->pb, cpe); yading@10: } yading@10: } yading@10: for (ch = 0; ch < chans; ch++) { yading@10: s->cur_channel = start_ch + ch; yading@10: encode_individual_channel(avctx, s, &cpe->ch[ch], cpe->common_window); yading@10: } yading@10: start_ch += chans; yading@10: } yading@10: yading@10: frame_bits = put_bits_count(&s->pb); yading@10: if (frame_bits <= 6144 * s->channels - 3) { yading@10: s->psy.bitres.bits = frame_bits / s->channels; yading@10: break; yading@10: } yading@10: yading@10: s->lambda *= avctx->bit_rate * 1024.0f / avctx->sample_rate / frame_bits; yading@10: yading@10: } while (1); yading@10: yading@10: put_bits(&s->pb, 3, TYPE_END); yading@10: flush_put_bits(&s->pb); yading@10: avctx->frame_bits = put_bits_count(&s->pb); yading@10: yading@10: // rate control stuff yading@10: if (!(avctx->flags & CODEC_FLAG_QSCALE)) { yading@10: float ratio = avctx->bit_rate * 1024.0f / avctx->sample_rate / avctx->frame_bits; yading@10: s->lambda *= ratio; yading@10: s->lambda = FFMIN(s->lambda, 65536.f); yading@10: } yading@10: yading@10: if (!frame) yading@10: s->last_frame++; yading@10: yading@10: ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts, yading@10: &avpkt->duration); yading@10: yading@10: avpkt->size = put_bits_count(&s->pb) >> 3; yading@10: *got_packet_ptr = 1; yading@10: return 0; yading@10: } yading@10: yading@10: static av_cold int aac_encode_end(AVCodecContext *avctx) yading@10: { yading@10: AACEncContext *s = avctx->priv_data; yading@10: yading@10: ff_mdct_end(&s->mdct1024); yading@10: ff_mdct_end(&s->mdct128); yading@10: ff_psy_end(&s->psy); yading@10: if (s->psypp) yading@10: ff_psy_preprocess_end(s->psypp); yading@10: av_freep(&s->buffer.samples); yading@10: av_freep(&s->cpe); yading@10: ff_af_queue_close(&s->afq); yading@10: return 0; yading@10: } yading@10: yading@10: static av_cold int dsp_init(AVCodecContext *avctx, AACEncContext *s) yading@10: { yading@10: int ret = 0; yading@10: yading@10: avpriv_float_dsp_init(&s->fdsp, avctx->flags & CODEC_FLAG_BITEXACT); yading@10: yading@10: // window init yading@10: ff_kbd_window_init(ff_aac_kbd_long_1024, 4.0, 1024); yading@10: ff_kbd_window_init(ff_aac_kbd_short_128, 6.0, 128); yading@10: ff_init_ff_sine_windows(10); yading@10: ff_init_ff_sine_windows(7); yading@10: yading@10: if (ret = ff_mdct_init(&s->mdct1024, 11, 0, 32768.0)) yading@10: return ret; yading@10: if (ret = ff_mdct_init(&s->mdct128, 8, 0, 32768.0)) yading@10: return ret; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static av_cold int alloc_buffers(AVCodecContext *avctx, AACEncContext *s) yading@10: { yading@10: int ch; yading@10: FF_ALLOCZ_OR_GOTO(avctx, s->buffer.samples, 3 * 1024 * s->channels * sizeof(s->buffer.samples[0]), alloc_fail); yading@10: FF_ALLOCZ_OR_GOTO(avctx, s->cpe, sizeof(ChannelElement) * s->chan_map[0], alloc_fail); yading@10: FF_ALLOCZ_OR_GOTO(avctx, avctx->extradata, 5 + FF_INPUT_BUFFER_PADDING_SIZE, alloc_fail); yading@10: yading@10: for(ch = 0; ch < s->channels; ch++) yading@10: s->planar_samples[ch] = s->buffer.samples + 3 * 1024 * ch; yading@10: yading@10: return 0; yading@10: alloc_fail: yading@10: return AVERROR(ENOMEM); yading@10: } yading@10: yading@10: static av_cold int aac_encode_init(AVCodecContext *avctx) yading@10: { yading@10: AACEncContext *s = avctx->priv_data; yading@10: int i, ret = 0; yading@10: const uint8_t *sizes[2]; yading@10: uint8_t grouping[AAC_MAX_CHANNELS]; yading@10: int lengths[2]; yading@10: yading@10: avctx->frame_size = 1024; yading@10: yading@10: for (i = 0; i < 16; i++) yading@10: if (avctx->sample_rate == avpriv_mpeg4audio_sample_rates[i]) yading@10: break; yading@10: yading@10: s->channels = avctx->channels; yading@10: yading@10: ERROR_IF(i == 16, yading@10: "Unsupported sample rate %d\n", avctx->sample_rate); yading@10: ERROR_IF(s->channels > AAC_MAX_CHANNELS, yading@10: "Unsupported number of channels: %d\n", s->channels); yading@10: ERROR_IF(avctx->profile != FF_PROFILE_UNKNOWN && avctx->profile != FF_PROFILE_AAC_LOW, yading@10: "Unsupported profile %d\n", avctx->profile); yading@10: ERROR_IF(1024.0 * avctx->bit_rate / avctx->sample_rate > 6144 * s->channels, yading@10: "Too many bits per frame requested\n"); yading@10: yading@10: s->samplerate_index = i; yading@10: yading@10: s->chan_map = aac_chan_configs[s->channels-1]; yading@10: yading@10: if (ret = dsp_init(avctx, s)) yading@10: goto fail; yading@10: yading@10: if (ret = alloc_buffers(avctx, s)) yading@10: goto fail; yading@10: yading@10: avctx->extradata_size = 5; yading@10: put_audio_specific_config(avctx); yading@10: yading@10: sizes[0] = swb_size_1024[i]; yading@10: sizes[1] = swb_size_128[i]; yading@10: lengths[0] = ff_aac_num_swb_1024[i]; yading@10: lengths[1] = ff_aac_num_swb_128[i]; yading@10: for (i = 0; i < s->chan_map[0]; i++) yading@10: grouping[i] = s->chan_map[i + 1] == TYPE_CPE; yading@10: if (ret = ff_psy_init(&s->psy, avctx, 2, sizes, lengths, s->chan_map[0], grouping)) yading@10: goto fail; yading@10: s->psypp = ff_psy_preprocess_init(avctx); yading@10: s->coder = &ff_aac_coders[s->options.aac_coder]; yading@10: yading@10: if (HAVE_MIPSDSPR1) yading@10: ff_aac_coder_init_mips(s); yading@10: yading@10: s->lambda = avctx->global_quality ? avctx->global_quality : 120; yading@10: yading@10: ff_aac_tableinit(); yading@10: yading@10: for (i = 0; i < 428; i++) yading@10: ff_aac_pow34sf_tab[i] = sqrt(ff_aac_pow2sf_tab[i] * sqrt(ff_aac_pow2sf_tab[i])); yading@10: yading@10: avctx->delay = 1024; yading@10: ff_af_queue_init(avctx, &s->afq); yading@10: yading@10: return 0; yading@10: fail: yading@10: aac_encode_end(avctx); yading@10: return ret; yading@10: } yading@10: yading@10: #define AACENC_FLAGS AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM yading@10: static const AVOption aacenc_options[] = { yading@10: {"stereo_mode", "Stereo coding method", offsetof(AACEncContext, options.stereo_mode), AV_OPT_TYPE_INT, {.i64 = 0}, -1, 1, AACENC_FLAGS, "stereo_mode"}, yading@10: {"auto", "Selected by the Encoder", 0, AV_OPT_TYPE_CONST, {.i64 = -1 }, INT_MIN, INT_MAX, AACENC_FLAGS, "stereo_mode"}, yading@10: {"ms_off", "Disable Mid/Side coding", 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, INT_MIN, INT_MAX, AACENC_FLAGS, "stereo_mode"}, yading@10: {"ms_force", "Force Mid/Side for the whole frame if possible", 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, INT_MIN, INT_MAX, AACENC_FLAGS, "stereo_mode"}, yading@10: {"aac_coder", "", offsetof(AACEncContext, options.aac_coder), AV_OPT_TYPE_INT, {.i64 = 2}, 0, AAC_CODER_NB-1, AACENC_FLAGS}, yading@10: {NULL} yading@10: }; yading@10: yading@10: static const AVClass aacenc_class = { yading@10: "AAC encoder", yading@10: av_default_item_name, yading@10: aacenc_options, yading@10: LIBAVUTIL_VERSION_INT, yading@10: }; yading@10: yading@10: /* duplicated from avpriv_mpeg4audio_sample_rates to avoid shared build yading@10: * failures */ yading@10: static const int mpeg4audio_sample_rates[16] = { yading@10: 96000, 88200, 64000, 48000, 44100, 32000, yading@10: 24000, 22050, 16000, 12000, 11025, 8000, 7350 yading@10: }; yading@10: yading@10: AVCodec ff_aac_encoder = { yading@10: .name = "aac", yading@10: .type = AVMEDIA_TYPE_AUDIO, yading@10: .id = AV_CODEC_ID_AAC, yading@10: .priv_data_size = sizeof(AACEncContext), yading@10: .init = aac_encode_init, yading@10: .encode2 = aac_encode_frame, yading@10: .close = aac_encode_end, yading@10: .supported_samplerates = mpeg4audio_sample_rates, yading@10: .capabilities = CODEC_CAP_SMALL_LAST_FRAME | CODEC_CAP_DELAY | yading@10: CODEC_CAP_EXPERIMENTAL, yading@10: .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP, yading@10: AV_SAMPLE_FMT_NONE }, yading@10: .long_name = NULL_IF_CONFIG_SMALL("AAC (Advanced Audio Coding)"), yading@10: .priv_class = &aacenc_class, yading@10: };