1 files changed, 59 insertions, 0 deletions
diff --git a/libmpcodecs/ad_imaadpcm.c b/libmpcodecs/ad_imaadpcm.c
new file mode 100644
index 0000000000..eca064d6c5
--- /dev/null
+++ b/libmpcodecs/ad_imaadpcm.c
@@ -0,0 +1,59 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "config.h"
+#include "ad_internal.h"
+
+#include "../adpcm.h"
+
+static ad_info_t info = 
+{
+	"IMA ADPCM audio decoder",
+	"imaadpcm",
+	AFM_IMAADPCM,
+	"Nick Kurshev",
+	"Mike Melanson",
+	"ima4 (MOV files)"
+};
+
+LIBAD_EXTERN(imaadpcm)
+
+static int init(sh_audio_t *sh_audio)
+{
+  /* IMA-ADPCM 4:1 audio codec:*/
+  sh_audio->channels=sh_audio->wf->nChannels;
+  sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
+  /* decodes 34 byte -> 64 short*/
+  sh_audio->i_bps=IMA_ADPCM_BLOCK_SIZE*(sh_audio->channels*sh_audio->samplerate)/
+		  IMA_ADPCM_SAMPLES_PER_BLOCK;  /* 1:4 */
+  return 1;
+}
+
+static int preinit(sh_audio_t *sh_audio)
+{
+  sh_audio->audio_out_minsize=4096;
+  sh_audio->ds->ss_div=IMA_ADPCM_SAMPLES_PER_BLOCK;
+  sh_audio->ds->ss_mul=IMA_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels;
+  return 1;
+}
+
+static void uninit(sh_audio_t *sh)
+{
+}
+
+static int control(sh_audio_t *sh,int cmd,void* arg, ...)
+{
+    // TODO!!!
+  return CONTROL_UNKNOWN;
+}
+
+static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
+{
+    unsigned char ibuf[IMA_ADPCM_BLOCK_SIZE * 2]; /* bytes / stereo frame */
+    if (demux_read_data(sh_audio->ds, ibuf,
+      IMA_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels) != 
+      IMA_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels) 
+	return -1;
+    return 2*ima_adpcm_decode_block((unsigned short*)buf,ibuf, sh_audio->wf->nChannels);
+}