add pcm_s16le_planar support for electronicarts files

Originally committed as revision 11092 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 16 insertions, 3 deletions

diff --git a/libavcodec/pcm.c b/libavcodec/pcm.c
index d070628a04..88c39208f7 100644
--- a/libavcodec/pcm.c
+++ b/libavcodec/pcm.c
@@ -28,6 +28,8 @@
 #include "bitstream.h" // for ff_reverse
 #include "bytestream.h"
 
+#define MAX_CHANNELS 64
+
 /* from g711.c by SUN microsystems (unrestricted use) */
 
 #define         SIGN_BIT        (0x80)      /* Sign bit for a A-law byte. */
@@ -374,15 +376,15 @@ static int pcm_decode_frame(AVCodecContext *avctx,
                             uint8_t *buf, int buf_size)
 {
     PCMDecode *s = avctx->priv_data;
-    int n;
+    int c, n;
     short *samples;
-    uint8_t *src;
+    uint8_t *src, *src2[MAX_CHANNELS];
 
     samples = data;
     src = buf;
 
     n= av_get_bits_per_sample(avctx->codec_id)/8;
-    if(n && buf_size % n){
+    if((n && buf_size % n) || avctx->channels > MAX_CHANNELS){
         av_log(avctx, AV_LOG_ERROR, "invalid PCM packet\n");
         return -1;
     }
@@ -390,6 +392,10 @@ static int pcm_decode_frame(AVCodecContext *avctx,
     buf_size= FFMIN(buf_size, *data_size/2);
     *data_size=0;
 
+    n = buf_size/avctx->channels;
+    for(c=0;c<avctx->channels;c++)
+        src2[c] = &src[c*n];
+
     switch(avctx->codec->id) {
     case CODEC_ID_PCM_S32LE:
         decode_to16(4, 1, 0, &src, &samples, buf_size);
@@ -430,6 +436,12 @@ static int pcm_decode_frame(AVCodecContext *avctx,
             *samples++ = bytestream_get_le16(&src);
         }
         break;
+    case CODEC_ID_PCM_S16LE_PLANAR:
+        for(n>>=1;n>0;n--)
+            for(c=0;c<avctx->channels;c++)
+                *samples++ = bytestream_get_le16(&src2[c]);
+        src = src2[avctx->channels-1];
+        break;
     case CODEC_ID_PCM_S16BE:
         n = buf_size >> 1;
         for(;n>0;n--) {
@@ -528,6 +540,7 @@ PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
+PCM_DECODER(CODEC_ID_PCM_S16LE_PLANAR, pcm_s16le_planar);
 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);