Turn on AAC rate control.
[ffmpeg.git] / libavcodec / aacenc.c
index 3484521..61e0f52 100644 (file)
@@ -181,14 +181,14 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
     ff_sine_window_init(ff_sine_1024, 1024);
     ff_sine_window_init(ff_sine_128, 128);
 
-    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]);
-    avctx->extradata = av_malloc(2);
+    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]);
+    avctx->extradata      = av_malloc(2);
     avctx->extradata_size = 2;
     put_audio_specific_config(avctx);
 
-    sizes[0] = swb_size_1024[i];
-    sizes[1] = swb_size_128[i];
+    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);
@@ -276,9 +276,8 @@ static void put_ics_info(AACEncContext *s, IndividualChannelStream *info)
         put_bits(&s->pb, 1, 0);            // no prediction
     } else {
         put_bits(&s->pb, 4, info->max_sfb);
-        for (w = 1; w < 8; w++) {
+        for (w = 1; w < 8; w++)
             put_bits(&s->pb, 1, !info->group_len[w]);
-        }
     }
 }
 
@@ -291,12 +290,10 @@ static void encode_ms_info(PutBitContext *pb, ChannelElement *cpe)
     int i, w;
 
     put_bits(pb, 2, cpe->ms_mode);
-    if (cpe->ms_mode == 1) {
-        for (w = 0; w < cpe->ch[0].ics.num_windows; w += cpe->ch[0].ics.group_len[w]) {
+    if (cpe->ms_mode == 1)
+        for (w = 0; w < cpe->ch[0].ics.num_windows; w += cpe->ch[0].ics.group_len[w])
             for (i = 0; i < cpe->ch[0].ics.max_sfb; i++)
                 put_bits(pb, 1, cpe->ms_mask[w*16 + i]);
-        }
-    }
 }
 
 /**
@@ -324,7 +321,8 @@ static void adjust_frame_information(AACEncContext *apc, ChannelElement *cpe, in
                 }
                 start += ics->swb_sizes[g];
             }
-            for (cmaxsfb = ics->num_swb; cmaxsfb > 0 && cpe->ch[ch].zeroes[w+cmaxsfb-1]; cmaxsfb--);
+            for (cmaxsfb = ics->num_swb; cmaxsfb > 0 && cpe->ch[ch].zeroes[w+cmaxsfb-1]; cmaxsfb--)
+                ;
             maxsfb = FFMAX(maxsfb, cmaxsfb);
         }
         ics->max_sfb = maxsfb;
@@ -352,9 +350,12 @@ static void adjust_frame_information(AACEncContext *apc, ChannelElement *cpe, in
         ics1->max_sfb = ics0->max_sfb;
         for (w = 0; w < ics0->num_windows*16; w += 16)
             for (i = 0; i < ics0->max_sfb; i++)
-                if (cpe->ms_mask[w+i]) msc++;
-        if (msc == 0 || ics0->max_sfb == 0) cpe->ms_mode = 0;
-        else cpe->ms_mode = msc < ics0->max_sfb ? 1 : 2;
+                if (cpe->ms_mask[w+i])
+                    msc++;
+        if (msc == 0 || ics0->max_sfb == 0)
+            cpe->ms_mode = 0;
+        else
+            cpe->ms_mode = msc < ics0->max_sfb ? 1 : 2;
     }
 }
 
@@ -365,15 +366,15 @@ static void encode_band_info(AACEncContext *s, SingleChannelElement *sce)
 {
     int w;
 
-    for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
+    for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w])
         s->coder->encode_window_bands_info(s, sce, w, sce->ics.group_len[w], s->lambda);
-    }
 }
 
 /**
  * Encode scalefactors.
  */
-static void encode_scale_factors(AVCodecContext *avctx, AACEncContext *s, SingleChannelElement *sce)
+static void encode_scale_factors(AVCodecContext *avctx, AACEncContext *s,
+                                 SingleChannelElement *sce)
 {
     int off = sce->sf_idx[0], diff;
     int i, w;
@@ -382,7 +383,8 @@ static void encode_scale_factors(AVCodecContext *avctx, AACEncContext *s, Single
         for (i = 0; i < sce->ics.max_sfb; i++) {
             if (!sce->zeroes[w*16 + i]) {
                 diff = sce->sf_idx[w*16 + i] - off + SCALE_DIFF_ZERO;
-                if (diff < 0 || diff > 120) av_log(avctx, AV_LOG_ERROR, "Scalefactor difference is too big to be coded\n");
+                if (diff < 0 || diff > 120)
+                    av_log(avctx, AV_LOG_ERROR, "Scalefactor difference is too big to be coded\n");
                 off = sce->sf_idx[w*16 + i];
                 put_bits(&s->pb, ff_aac_scalefactor_bits[diff], ff_aac_scalefactor_code[diff]);
             }
@@ -398,7 +400,8 @@ static void encode_pulses(AACEncContext *s, Pulse *pulse)
     int i;
 
     put_bits(&s->pb, 1, !!pulse->num_pulse);
-    if (!pulse->num_pulse) return;
+    if (!pulse->num_pulse)
+        return;
 
     put_bits(&s->pb, 2, pulse->num_pulse - 1);
     put_bits(&s->pb, 6, pulse->start);
@@ -422,13 +425,12 @@ static void encode_spectral_coeffs(AACEncContext *s, SingleChannelElement *sce)
                 start += sce->ics.swb_sizes[i];
                 continue;
             }
-            for (w2 = w; w2 < w + sce->ics.group_len[w]; w2++) {
+            for (w2 = w; w2 < w + sce->ics.group_len[w]; w2++)
                 s->coder->quantize_and_encode_band(s, &s->pb, sce->coeffs + start + w2*128,
-                                         sce->ics.swb_sizes[i],
-                                         sce->sf_idx[w*16 + i],
-                                         sce->band_type[w*16 + i],
-                                         s->lambda);
-            }
+                                                   sce->ics.swb_sizes[i],
+                                                   sce->sf_idx[w*16 + i],
+                                                   sce->band_type[w*16 + i],
+                                                   s->lambda);
             start += sce->ics.swb_sizes[i];
         }
     }
@@ -437,10 +439,13 @@ static void encode_spectral_coeffs(AACEncContext *s, SingleChannelElement *sce)
 /**
  * Encode one channel of audio data.
  */
-static int encode_individual_channel(AVCodecContext *avctx, AACEncContext *s, SingleChannelElement *sce, int common_window)
+static int encode_individual_channel(AVCodecContext *avctx, AACEncContext *s,
+                                     SingleChannelElement *sce,
+                                     int common_window)
 {
     put_bits(&s->pb, 8, sce->sf_idx[0]);
-    if (!common_window) put_ics_info(s, &sce->ics);
+    if (!common_window)
+        put_ics_info(s, &sce->ics);
     encode_band_info(s, sce);
     encode_scale_factors(avctx, s, sce);
     encode_pulses(s, &sce->pulse);
@@ -453,7 +458,8 @@ static int encode_individual_channel(AVCodecContext *avctx, AACEncContext *s, Si
 /**
  * Write some auxiliary information about the created AAC file.
  */
-static void put_bitstream_info(AVCodecContext *avctx, AACEncContext *s, const char *name)
+static void put_bitstream_info(AVCodecContext *avctx, AACEncContext *s,
+                               const char *name)
 {
     int i, namelen, padbits;
 
@@ -484,37 +490,40 @@ static int aac_encode_frame(AVCodecContext *avctx,
         return 0;
     if (data) {
         if (!s->psypp) {
-            memcpy(s->samples + 1024 * avctx->channels, data, 1024 * avctx->channels * sizeof(s->samples[0]));
+            memcpy(s->samples + 1024 * avctx->channels, data,
+                   1024 * avctx->channels * sizeof(s->samples[0]));
         } else {
             start_ch = 0;
             samples2 = s->samples + 1024 * avctx->channels;
             for (i = 0; i < chan_map[0]; i++) {
                 tag = chan_map[i+1];
                 chans = tag == TYPE_CPE ? 2 : 1;
-                ff_psy_preprocess(s->psypp, (uint16_t*)data + start_ch, samples2 + start_ch, start_ch, chans);
+                ff_psy_preprocess(s->psypp, (uint16_t*)data + start_ch,
+                                  samples2 + start_ch, start_ch, chans);
                 start_ch += chans;
             }
         }
     }
     if (!avctx->frame_number) {
-        memcpy(s->samples, s->samples + 1024 * avctx->channels, 1024 * avctx->channels * sizeof(s->samples[0]));
+        memcpy(s->samples, s->samples + 1024 * avctx->channels,
+               1024 * avctx->channels * sizeof(s->samples[0]));
         return 0;
     }
 
     init_put_bits(&s->pb, frame, buf_size*8);
-    if ((avctx->frame_number & 0xFF)==1 && !(avctx->flags & CODEC_FLAG_BITEXACT)) {
+    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[2];
-        tag = chan_map[i+1];
-        chans = tag == TYPE_CPE ? 2 : 1;
-        cpe = &s->cpe[i];
+        tag      = chan_map[i+1];
+        chans    = tag == TYPE_CPE ? 2 : 1;
+        cpe      = &s->cpe[i];
         samples2 = samples + start_ch;
-        la = samples2 + 1024 * avctx->channels + start_ch;
-        if (!data) la = NULL;
+        la       = samples2 + 1024 * avctx->channels + start_ch;
+        if (!data)
+            la = NULL;
         for (j = 0; j < chans; j++) {
             IndividualChannelStream *ics = &cpe->ch[j].ics;
             int k;
@@ -574,15 +583,17 @@ static int aac_encode_frame(AVCodecContext *avctx,
     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);
     }
 
-    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 (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, 1024 * avctx->channels * sizeof(s->samples[0]));
+    memcpy(s->samples, s->samples + 1024 * avctx->channels,
+           1024 * avctx->channels * sizeof(s->samples[0]));
     return put_bits_count(&s->pb)>>3;
 }