mpegvideo: call av_frame_unref() instead of avcodec_get_frame_defaults().

[ffmpeg] / libavcodec / mpegaudiodecheader.c

diff --git a/libavcodec/mpegaudiodecheader.c b/libavcodec/mpegaudiodecheader.c
index a0bd4fcee60e14f8dc9c40f6f6728978adcbef6e..69dda452c3f2a51263e86ba378b093acf6c12070 100644 (file)
--- a/libavcodec/mpegaudiodecheader.c
+++ b/libavcodec/mpegaudiodecheader.c
@@ -24,14 +24,13 @@
  * MPEG Audio header decoder.
  */
 
-//#define DEBUG
 #include "avcodec.h"
 #include "mpegaudio.h"
 #include "mpegaudiodata.h"
 #include "mpegaudiodecheader.h"
 
 
-int ff_mpegaudio_decode_header(MPADecodeHeader *s, uint32_t header)
+int avpriv_mpegaudio_decode_header(MPADecodeHeader *s, uint32_t header)
 {
     int sample_rate, frame_size, mpeg25, padding;
     int sample_rate_index, bitrate_index;
@@ -46,7 +45,7 @@ int ff_mpegaudio_decode_header(MPADecodeHeader *s, uint32_t header)
     s->layer = 4 - ((header >> 17) & 3);
     /* extract frequency */
     sample_rate_index = (header >> 10) & 3;
-    sample_rate = ff_mpa_freq_tab[sample_rate_index] >> (s->lsf + mpeg25);
+    sample_rate = avpriv_mpa_freq_tab[sample_rate_index] >> (s->lsf + mpeg25);
     sample_rate_index += 3 * (s->lsf + mpeg25);
     s->sample_rate_index = sample_rate_index;
     s->error_protection = ((header >> 16) & 1) ^ 1;
@@ -67,7 +66,7 @@ int ff_mpegaudio_decode_header(MPADecodeHeader *s, uint32_t header)
         s->nb_channels = 2;
 
     if (bitrate_index != 0) {
-        frame_size = ff_mpa_bitrate_tab[s->lsf][s->layer - 1][bitrate_index];
+        frame_size = avpriv_mpa_bitrate_tab[s->lsf][s->layer - 1][bitrate_index];
         s->bit_rate = frame_size * 1000;
         switch(s->layer) {
         case 1:
@@ -108,3 +107,39 @@ int ff_mpegaudio_decode_header(MPADecodeHeader *s, uint32_t header)
 #endif
     return 0;
 }
+
+int avpriv_mpa_decode_header(AVCodecContext *avctx, uint32_t head, int *sample_rate, int *channels, int *frame_size, int *bit_rate)
+{
+    MPADecodeHeader s1, *s = &s1;
+
+    if (ff_mpa_check_header(head) != 0)
+        return -1;
+
+    if (avpriv_mpegaudio_decode_header(s, head) != 0) {
+        return -1;
+    }
+
+    switch(s->layer) {
+    case 1:
+        avctx->codec_id = AV_CODEC_ID_MP1;
+        *frame_size = 384;
+        break;
+    case 2:
+        avctx->codec_id = AV_CODEC_ID_MP2;
+        *frame_size = 1152;
+        break;
+    default:
+    case 3:
+        avctx->codec_id = AV_CODEC_ID_MP3;
+        if (s->lsf)
+            *frame_size = 576;
+        else
+            *frame_size = 1152;
+        break;
+    }
+
+    *sample_rate = s->sample_rate;
+    *channels = s->nb_channels;
+    *bit_rate = s->bit_rate;
+    return s->frame_size;
+}