*/
/**
- * @file libavcodec/aacenc.c
+ * @file
* AAC encoder
*/
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);
// 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_sine_window_init(ff_sine_1024, 1024);
- ff_sine_window_init(ff_sine_128, 128);
+ ff_init_ff_sine_windows(10);
+ ff_init_ff_sine_windows(7);
s->samples = av_malloc(2 * 1024 * avctx->channels * sizeof(s->samples[0]));
s->cpe = av_mallocz(sizeof(ChannelElement) * aac_chan_configs[avctx->channels-1][0]);
}
start_ch += chans;
}
- init_put_bits(&s->pb, frame, buf_size*8);
- if ((avctx->frame_number & 0xFF)==1 && !(avctx->flags & CODEC_FLAG_BITEXACT))
- put_bitstream_info(avctx, s, LIBAVCODEC_IDENT);
- start_ch = 0;
- memset(chan_el_counter, 0, sizeof(chan_el_counter));
- for (i = 0; i < chan_map[0]; i++) {
- FFPsyWindowInfo* wi = windows + start_ch;
- tag = chan_map[i+1];
- chans = tag == TYPE_CPE ? 2 : 1;
- cpe = &s->cpe[i];
- for (j = 0; j < chans; j++) {
- s->coder->search_for_quantizers(avctx, s, &cpe->ch[j], s->lambda);
- }
- cpe->common_window = 0;
- if (chans > 1
- && wi[0].window_type[0] == wi[1].window_type[0]
- && wi[0].window_shape == wi[1].window_shape) {
-
- cpe->common_window = 1;
- for (j = 0; j < wi[0].num_windows; j++) {
- if (wi[0].grouping[j] != wi[1].grouping[j]) {
- cpe->common_window = 0;
- break;
+ do {
+ int frame_bits;
+ init_put_bits(&s->pb, frame, buf_size*8);
+ if ((avctx->frame_number & 0xFF)==1 && !(avctx->flags & CODEC_FLAG_BITEXACT))
+ put_bitstream_info(avctx, s, LIBAVCODEC_IDENT);
+ start_ch = 0;
+ memset(chan_el_counter, 0, sizeof(chan_el_counter));
+ for (i = 0; i < chan_map[0]; i++) {
+ FFPsyWindowInfo* wi = windows + start_ch;
+ tag = chan_map[i+1];
+ chans = tag == TYPE_CPE ? 2 : 1;
+ cpe = &s->cpe[i];
+ for (j = 0; j < chans; j++) {
+ s->cur_channel = start_ch + j;
+ s->coder->search_for_quantizers(avctx, s, &cpe->ch[j], s->lambda);
+ }
+ cpe->common_window = 0;
+ if (chans > 1
+ && wi[0].window_type[0] == wi[1].window_type[0]
+ && wi[0].window_shape == wi[1].window_shape) {
+
+ cpe->common_window = 1;
+ for (j = 0; j < wi[0].num_windows; j++) {
+ if (wi[0].grouping[j] != wi[1].grouping[j]) {
+ cpe->common_window = 0;
+ break;
+ }
}
}
- }
- if (cpe->common_window && s->coder->search_for_ms)
- s->coder->search_for_ms(s, cpe, s->lambda);
- adjust_frame_information(s, cpe, chans);
- put_bits(&s->pb, 3, tag);
- put_bits(&s->pb, 4, chan_el_counter[tag]++);
- if (chans == 2) {
- put_bits(&s->pb, 1, cpe->common_window);
- if (cpe->common_window) {
- put_ics_info(s, &cpe->ch[0].ics);
- encode_ms_info(&s->pb, cpe);
+ s->cur_channel = start_ch;
+ if (cpe->common_window && s->coder->search_for_ms)
+ s->coder->search_for_ms(s, cpe, s->lambda);
+ adjust_frame_information(s, cpe, chans);
+ put_bits(&s->pb, 3, tag);
+ put_bits(&s->pb, 4, chan_el_counter[tag]++);
+ if (chans == 2) {
+ put_bits(&s->pb, 1, cpe->common_window);
+ if (cpe->common_window) {
+ put_ics_info(s, &cpe->ch[0].ics);
+ encode_ms_info(&s->pb, cpe);
+ }
}
+ for (j = 0; j < chans; j++) {
+ s->cur_channel = start_ch + j;
+ ff_psy_set_band_info(&s->psy, s->cur_channel, cpe->ch[j].coeffs, &wi[j]);
+ encode_individual_channel(avctx, s, &cpe->ch[j], cpe->common_window);
+ }
+ start_ch += chans;
}
- for (j = 0; j < chans; j++) {
- s->cur_channel = start_ch + j;
- ff_psy_set_band_info(&s->psy, s->cur_channel, cpe->ch[j].coeffs, &wi[j]);
- encode_individual_channel(avctx, s, &cpe->ch[j], cpe->common_window);
- }
- start_ch += chans;
- }
+
+ frame_bits = put_bits_count(&s->pb);
+ if (frame_bits <= 6144 * avctx->channels - 3)
+ break;
+
+ s->lambda *= avctx->bit_rate * 1024.0f / avctx->sample_rate / frame_bits;
+
+ } while (1);
put_bits(&s->pb, 3, TYPE_END);
flush_put_bits(&s->pb);
if (!(avctx->flags & CODEC_FLAG_QSCALE)) {
float ratio = avctx->bit_rate * 1024.0f / avctx->sample_rate / avctx->frame_bits;
s->lambda *= ratio;
- s->lambda = fminf(s->lambda, 65536.f);
+ s->lambda = FFMIN(s->lambda, 65536.f);
}
- if (avctx->frame_bits > 6144*avctx->channels)
- av_log(avctx, AV_LOG_ERROR, "input buffer violation %d > %d.\n",
- avctx->frame_bits, 6144*avctx->channels);
-
if (!data)
s->last_frame = 1;
memcpy(s->samples, s->samples + 1024 * avctx->channels,
AVCodec aac_encoder = {
"aac",
- CODEC_TYPE_AUDIO,
+ AVMEDIA_TYPE_AUDIO,
CODEC_ID_AAC,
sizeof(AACEncContext),
aac_encode_init,
aac_encode_frame,
aac_encode_end,
.capabilities = CODEC_CAP_SMALL_LAST_FRAME | CODEC_CAP_DELAY,
- .sample_fmts = (enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
+ .sample_fmts = (const enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("Advanced Audio Coding"),
};
projects / ffmpeg / blobdiff