void ff_quantize_band_cost_cache_init(struct AACEncContext *s)
{
- int sf, g;
- for (sf = 0; sf < 256; sf++) {
- for (g = 0; g < 128; g++) {
- s->quantize_band_cost_cache[sf][g].bits = -1;
- }
+ ++s->quantize_band_cost_cache_generation;
+ if (s->quantize_band_cost_cache_generation == 0) {
+ memset(s->quantize_band_cost_cache, 0, sizeof(s->quantize_band_cost_cache));
+ s->quantize_band_cost_cache_generation = 1;
}
}
uint8_t grouping[AAC_MAX_CHANNELS];
int lengths[2];
- s->channels = avctx->channels;
- s->chan_map = aac_chan_configs[s->channels-1];
- s->lambda = avctx->global_quality > 0 ? avctx->global_quality : 120;
+ /* Constants */
s->last_frame_pb_count = 0;
avctx->extradata_size = 5;
avctx->frame_size = 1024;
avctx->initial_padding = 1024;
- avctx->bit_rate = (int)FFMIN(
- 6144 * s->channels / 1024.0 * avctx->sample_rate,
- avctx->bit_rate);
- avctx->profile = avctx->profile == FF_PROFILE_UNKNOWN ? FF_PROFILE_AAC_LOW :
- avctx->profile;
+ s->lambda = avctx->global_quality > 0 ? avctx->global_quality : 120;
+
+ /* Channel map and unspecified bitrate guessing */
+ s->channels = avctx->channels;
+ ERROR_IF(s->channels > AAC_MAX_CHANNELS || s->channels == 7,
+ "Unsupported number of channels: %d\n", s->channels);
+ s->chan_map = aac_chan_configs[s->channels-1];
+ if (!avctx->bit_rate) {
+ for (i = 1; i <= s->chan_map[0]; i++) {
+ avctx->bit_rate += s->chan_map[i] == TYPE_CPE ? 128000 : /* Pair */
+ s->chan_map[i] == TYPE_LFE ? 16000 : /* LFE */
+ 69000 ; /* SCE */
+ }
+ }
+ /* Samplerate */
for (i = 0; i < 16; i++)
if (avctx->sample_rate == avpriv_mpeg4audio_sample_rates[i])
break;
s->samplerate_index = i;
-
ERROR_IF(s->samplerate_index == 16 ||
s->samplerate_index >= ff_aac_swb_size_1024_len ||
s->samplerate_index >= ff_aac_swb_size_128_len,
"Unsupported sample rate %d\n", avctx->sample_rate);
- ERROR_IF(s->channels > AAC_MAX_CHANNELS || s->channels == 7,
- "Unsupported number of channels: %d\n", s->channels);
+
+ /* Bitrate limiting */
WARN_IF(1024.0 * avctx->bit_rate / avctx->sample_rate > 6144 * s->channels,
"Too many bits %f > %d per frame requested, clamping to max\n",
1024.0 * avctx->bit_rate / avctx->sample_rate,
6144 * s->channels);
+ avctx->bit_rate = (int64_t)FFMIN(6144 * s->channels / 1024.0 * avctx->sample_rate,
+ avctx->bit_rate);
+ /* Profile and option setting */
+ avctx->profile = avctx->profile == FF_PROFILE_UNKNOWN ? FF_PROFILE_AAC_LOW :
+ avctx->profile;
for (i = 0; i < FF_ARRAY_ELEMS(aacenc_profiles); i++)
if (avctx->profile == aacenc_profiles[i])
break;
- ERROR_IF(i == FF_ARRAY_ELEMS(aacenc_profiles),
- "Unsupported encoding profile: %d\n", avctx->profile);
if (avctx->profile == FF_PROFILE_MPEG2_AAC_LOW) {
avctx->profile = FF_PROFILE_AAC_LOW;
ERROR_IF(s->options.pred,
"LTP prediction unavailable in the \"aac_main\" profile\n");
}
s->profile = avctx->profile;
- s->coder = &ff_aac_coders[s->options.coder];
+ /* Coder limitations */
+ s->coder = &ff_aac_coders[s->options.coder];
if (s->options.coder != AAC_CODER_TWOLOOP) {
ERROR_IF(avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL,
"Coders other than twoloop require -strict -2 and some may be removed in the future\n");
s->options.intensity_stereo = 0;
s->options.pns = 0;
}
-
ERROR_IF(s->options.ltp && avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL,
"The LPT profile requires experimental compliance, add -strict -2 to enable!\n");
+ /* M/S introduces horrible artifacts with multichannel files, this is temporary */
+ if (s->channels > 3)
+ s->options.mid_side = 0;
+
if ((ret = dsp_init(avctx, s)) < 0)
goto fail;
LIBAVUTIL_VERSION_INT,
};
+static const AVCodecDefault aac_encode_defaults[] = {
+ { "b", "0" },
+ { NULL }
+};
+
AVCodec ff_aac_encoder = {
.name = "aac",
.long_name = NULL_IF_CONFIG_SMALL("AAC (Advanced Audio Coding)"),
.init = aac_encode_init,
.encode2 = aac_encode_frame,
.close = aac_encode_end,
+ .defaults = aac_encode_defaults,
.supported_samplerates = mpeg4audio_sample_rates,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
.capabilities = AV_CODEC_CAP_SMALL_LAST_FRAME | AV_CODEC_CAP_DELAY,