Add rule for building API example programs.

[ffmpeg] / libavcodec / aacenc.c

diff --git a/libavcodec/aacenc.c b/libavcodec/aacenc.c
index dccb29a512753d357bccf4ad7fad07fc19723ca4..fb7b6b18ca120c4a7002ac335b46bc7817b79dfb 100644 (file)
--- a/libavcodec/aacenc.c
+++ b/libavcodec/aacenc.c
@@ -20,7 +20,7 @@
  */
 
 /**
- * @file aacenc.c
+ * @file libavcodec/aacenc.c
  * AAC encoder
  */
 
@@ -28,6 +28,7 @@
  *              TODOs:
  * psy model selection with some option
  * add sane pulse detection
+ * add temporal noise shaping
  ***********************************/
 
 #include "avcodec.h"
@@ -82,7 +83,7 @@ static const uint8_t swb_size_1024_8[] = {
     32, 36, 36, 40, 44, 48, 52, 56, 60, 64, 80
 };
 
-static const uint8_t *swb_size_1024[] = {
+static const uint8_t * const swb_size_1024[] = {
     swb_size_1024_96, swb_size_1024_96, swb_size_1024_64,
     swb_size_1024_48, swb_size_1024_48, swb_size_1024_32,
     swb_size_1024_24, swb_size_1024_24, swb_size_1024_16,
@@ -109,7 +110,7 @@ static const uint8_t swb_size_128_8[] = {
     4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 12, 16, 20, 20
 };
 
-static const uint8_t *swb_size_128[] = {
+static const uint8_t * const swb_size_128[] = {
     /* the last entry on the following row is swb_size_128_64 but is a
        duplicate of swb_size_128_96 */
     swb_size_128_96, swb_size_128_96, swb_size_128_96,
@@ -131,7 +132,7 @@ static const uint8_t run_value_bits_short[16] = {
     3, 3, 3, 3, 3, 3, 3, 6, 6, 6, 6, 6, 6, 6, 6, 9
 };
 
-static const uint8_t* run_value_bits[2] = {
+static const uint8_t* const run_value_bits[2] = {
     run_value_bits_long, run_value_bits_short
 };
 
@@ -162,6 +163,12 @@ typedef struct {
     MDCTContext mdct1024;                        ///< long (1024 samples) frame transform context
     MDCTContext mdct128;                         ///< short (128 samples) frame transform context
     DSPContext  dsp;
+    DECLARE_ALIGNED_16(FFTSample, output[2048]); ///< temporary buffer for MDCT input coefficients
+    int16_t* samples;                            ///< saved preprocessed input
+
+    int samplerate_index;                        ///< MPEG-4 samplerate index
+
+    ChannelElement *cpe;                         ///< channel elements
     AACPsyContext psy;                           ///< psychoacoustic model context
     int last_frame;
 } AACEncContext;
@@ -205,10 +212,6 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
         return -1;
     }
     s->samplerate_index = i;
-    s->swb_sizes1024 = swb_size_1024[i];
-    s->swb_num1024   = ff_aac_num_swb_1024[i];
-    s->swb_sizes128  = swb_size_128[i];
-    s->swb_num128    = ff_aac_num_swb_128[i];
 
     dsputil_init(&s->dsp, avctx);
     ff_mdct_init(&s->mdct1024, 11, 0);
@@ -221,7 +224,9 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
 
     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]);
-    if(ff_aac_psy_init(&s->psy, avctx, AAC_PSY_3GPP, aac_chan_configs[avctx->channels-1][0], 0, s->swb_sizes1024, s->swb_num1024, s->swb_sizes128, s->swb_num128) < 0){
+    if(ff_aac_psy_init(&s->psy, avctx, AAC_PSY_3GPP,
+                       aac_chan_configs[avctx->channels-1][0], 0,
+                       swb_size_1024[i], ff_aac_num_swb_1024[i], swb_size_128[i], ff_aac_num_swb_128[i]) < 0){
         av_log(avctx, AV_LOG_ERROR, "Cannot initialize selected model.\n");
         return -1;
     }
@@ -235,9 +240,8 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
  * Encode ics_info element.
  * @see Table 4.6 (syntax of ics_info)
  */
-static void put_ics_info(AVCodecContext *avctx, IndividualChannelStream *info)
+static void put_ics_info(AACEncContext *s, IndividualChannelStream *info)
 {
-    AACEncContext *s = avctx->priv_data;
     int i;
 
     put_bits(&s->pb, 1, 0);                // ics_reserved bit
@@ -253,10 +257,28 @@ static void put_ics_info(AVCodecContext *avctx, IndividualChannelStream *info)
     }
 }
 
+/**
+ * Calculate the number of bits needed to code all coefficient signs in current band.
+ */
+static int calculate_band_sign_bits(AACEncContext *s, SingleChannelElement *sce,
+                                    int group_len, int start, int size)
+{
+    int bits = 0;
+    int i, w;
+    for(w = 0; w < group_len; w++){
+        for(i = 0; i < size; i++){
+            if(sce->icoefs[start + i])
+                bits++;
+        }
+        start += 128;
+    }
+    return bits;
+}
+
 /**
  * Encode pulse data.
  */
-static void encode_pulses(AVCodecContext *avctx, AACEncContext *s, Pulse *pulse, int channel)
+static void encode_pulses(AACEncContext *s, Pulse *pulse)
 {
     int i;
 
@@ -274,24 +296,26 @@ static void encode_pulses(AVCodecContext *avctx, AACEncContext *s, Pulse *pulse,
 /**
  * Encode spectral coefficients processed by psychoacoustic model.
  */
-static void encode_spectral_coeffs(AVCodecContext *avctx, AACEncContext *s, ChannelElement *cpe, int channel)
+static void encode_spectral_coeffs(AACEncContext *s, SingleChannelElement *sce)
 {
     int start, i, w, w2, wg;
 
     w = 0;
-    for(wg = 0; wg < cpe->ch[channel].ics.num_window_groups; wg++){
+    for(wg = 0; wg < sce->ics.num_window_groups; wg++){
         start = 0;
-        for(i = 0; i < cpe->ch[channel].ics.max_sfb; i++){
-            if(cpe->ch[channel].zeroes[w*16 + i]){
-                start += cpe->ch[channel].ics.swb_sizes[i];
+        for(i = 0; i < sce->ics.max_sfb; i++){
+            if(sce->zeroes[w*16 + i]){
+                start += sce->ics.swb_sizes[i];
                 continue;
             }
-            for(w2 = w; w2 < w + cpe->ch[channel].ics.group_len[wg]; w2++){
-                encode_band_coeffs(s, cpe, channel, start + w2*128, cpe->ch[channel].ics.swb_sizes[i], cpe->ch[channel].band_type[w*16 + i]);
+            for(w2 = w; w2 < w + sce->ics.group_len[wg]; w2++){
+                encode_band_coeffs(s, sce, start + w2*128,
+                                   sce->ics.swb_sizes[i],
+                                   sce->band_type[w*16 + i]);
             }
-            start += cpe->ch[channel].ics.swb_sizes[i];
+            start += sce->ics.swb_sizes[i];
         }
-        w += cpe->ch[channel].ics.group_len[wg];
+        w += sce->ics.group_len[wg];
     }
 }