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[ffmpeg] / libavcodec / imc.c

diff --git a/libavcodec/imc.c b/libavcodec/imc.c
index 54c22df97817f6abdec31055b869bcb9d8c1a50b..730d8218da6120735b35e0d9e5eb6716812bff32 100644 (file)
--- a/libavcodec/imc.c
+++ b/libavcodec/imc.c
@@ -22,7 +22,8 @@
  */
 
 /**
- *  @file libavcodec/imc.c IMC - Intel Music Coder
+ *  @file
+ *  IMC - Intel Music Coder
  *  A mdct based codec using a 256 points large transform
  *  divied into 32 bands with some mix of scale factors.
  *  Only mono is supported.
@@ -38,6 +39,7 @@
 #include "avcodec.h"
 #include "get_bits.h"
 #include "dsputil.h"
+#include "fft.h"
 
 #include "imcdata.h"
 
@@ -85,7 +87,7 @@ typedef struct {
     DSPContext dsp;
     FFTContext fft;
     DECLARE_ALIGNED(16, FFTComplex, samples)[COEFFS/2];
-    DECLARE_ALIGNED(16, float, out_samples)[COEFFS];
+    float *out_samples;
 } IMCContext;
 
 static VLC huffman_vlc[4][4];
@@ -114,8 +116,8 @@ static av_cold int imc_decode_init(AVCodecContext * avctx)
     for(i = 0; i < COEFFS; i++)
         q->mdct_sine_window[i] *= sqrt(2.0);
     for(i = 0; i < COEFFS/2; i++){
-        q->post_cos[i] = cos(i / 256.0 * M_PI);
-        q->post_sin[i] = sin(i / 256.0 * M_PI);
+        q->post_cos[i] = (1.0f / 32768) * cos(i / 256.0 * M_PI);
+        q->post_sin[i] = (1.0f / 32768) * sin(i / 256.0 * M_PI);
 
         r1 = sin((i * 4.0 + 1.0) / 1024.0 * M_PI);
         r2 = cos((i * 4.0 + 1.0) / 1024.0 * M_PI);
@@ -154,7 +156,7 @@ static av_cold int imc_decode_init(AVCodecContext * avctx)
 
     ff_fft_init(&q->fft, 7, 1);
     dsputil_init(&q->dsp, avctx);
-    avctx->sample_fmt = SAMPLE_FMT_S16;
+    avctx->sample_fmt = SAMPLE_FMT_FLT;
     avctx->channel_layout = (avctx->channels==2) ? CH_LAYOUT_STEREO : CH_LAYOUT_MONO;
     return 0;
 }
@@ -360,7 +362,7 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits,
         iacc = 0;
 
         for(j = (stream_format_code & 0x2)?4:0; j < BANDS; j++) {
-            cwlen = av_clip((int)((q->flcoeffs4[j] * 0.5) - summa + 0.5), 0, 6);
+            cwlen = av_clipf(((q->flcoeffs4[j] * 0.5) - summa + 0.5), 0, 6);
 
             q->bitsBandT[j] = cwlen;
             summer += q->bandWidthT[j] * cwlen;
@@ -658,8 +660,9 @@ static int imc_decode_frame(AVCodecContext * avctx,
         return -1;
     }
     for(i = 0; i < IMC_BLOCK_SIZE / 2; i++)
-        buf16[i] = bswap_16(((const uint16_t*)buf)[i]);
+        buf16[i] = av_bswap16(((const uint16_t*)buf)[i]);
 
+    q->out_samples = data;
     init_get_bits(&q->gb, (const uint8_t*)buf16, IMC_BLOCK_SIZE * 8);
 
     /* Check the frame header */
@@ -803,9 +806,7 @@ static int imc_decode_frame(AVCodecContext * avctx,
 
     imc_imdct256(q);
 
-    q->dsp.float_to_int16(data, q->out_samples, COEFFS);
-
-    *data_size = COEFFS * sizeof(int16_t);
+    *data_size = COEFFS * sizeof(float);
 
     return IMC_BLOCK_SIZE;
 }
@@ -822,7 +823,7 @@ static av_cold int imc_decode_close(AVCodecContext * avctx)
 
 AVCodec imc_decoder = {
     .name = "imc",
-    .type = CODEC_TYPE_AUDIO,
+    .type = AVMEDIA_TYPE_AUDIO,
     .id = CODEC_ID_IMC,
     .priv_data_size = sizeof(IMCContext),
     .init = imc_decode_init,