1 files changed, 195 insertions, 0 deletions

diff --git a/apps/codecs/wmavoice.c b/apps/codecs/wmavoice.c
new file mode 100644
index 0000000000..904af23b99
--- /dev/null
+++ b/apps/codecs/wmavoice.c
@@ -0,0 +1,195 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2010 Mohamed Tarek
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "codeclib.h"
+#include "libasf/asf.h"
+#include "libwmavoice/wmavoice.h"
+
+CODEC_HEADER
+
+static AVCodecContext avctx;
+static AVPacket avpkt;
+
+#define MAX_FRAMES           3   /*maximum number of frames per superframe*/
+#define MAX_FRAMESIZE        160 /* maximum number of samples per frame */
+#define BUFSIZE              MAX_FRAMES*MAX_FRAMESIZE
+static int32_t decoded[BUFSIZE] IBSS_ATTR;
+
+
+/* This function initialises AVCodecContext with the data needed for the wmapro
+ * decoder to work. The required data is taken from asf_waveformatex_t because that's
+ * what the rockbox asf metadata parser fill/work with. In the future, when the 
+ * codec is being optimised for on-target playback this function should not be needed. */
+static void init_codec_ctx(AVCodecContext *avctx, asf_waveformatex_t *wfx)
+{
+    /* Copy the extra-data */
+    avctx->extradata_size = wfx->datalen;
+    avctx->extradata = (uint8_t *)malloc(wfx->datalen*sizeof(uint8_t));
+    memcpy(avctx->extradata, wfx->data, wfx->datalen*sizeof(uint8_t));
+    
+    avctx->block_align = wfx->blockalign;
+    avctx->sample_rate = wfx->rate;
+    avctx->channels    = wfx->channels;
+    
+}
+
+/* this is the codec entry point */
+enum codec_status codec_main(void)
+{
+    uint32_t elapsedtime;
+    int retval;
+    asf_waveformatex_t wfx;     /* Holds the stream properties */
+    size_t resume_offset;
+    int res;                    /* Return values from asf_read_packet() and decode_packet() */
+    uint8_t* audiobuf;          /* Pointer to the payload of one wma pro packet */
+    int audiobufsize;           /* Payload size */
+    int packetlength = 0;       /* Logical packet size (minus the header size) */          
+    int outlen = 0;             /* Number of bytes written to the output buffer */
+    int pktcnt = 0;             /* Count of the packets played */
+
+    /* Generic codec initialisation */
+    ci->configure(DSP_SET_SAMPLE_DEPTH, 31);
+    
+
+next_track:
+
+    /* Wait for the metadata to be read */
+    while (!*ci->taginfo_ready && !ci->stop_codec)
+        ci->sleep(1);
+
+    retval = CODEC_OK;
+
+    /* Remember the resume position */
+    resume_offset = ci->id3->offset;
+ restart_track:   
+    if (codec_init()) {
+        LOGF("(WMA Voice) Error: Error initialising codec\n");
+        retval = CODEC_ERROR;
+        goto done;
+    }
+
+    /* Copy the format metadata we've stored in the id3 TOC field.  This
+       saves us from parsing it again here. */
+    memcpy(&wfx, ci->id3->toc, sizeof(wfx));
+    memset(&avctx, 0, sizeof(AVCodecContext));
+    memset(&avpkt, 0, sizeof(AVPacket));
+    
+    ci->configure(DSP_SWITCH_FREQUENCY, wfx.rate);
+    ci->configure(DSP_SET_STEREO_MODE, wfx.channels == 1 ?
+                  STEREO_MONO : STEREO_INTERLEAVED);
+    codec_set_replaygain(ci->id3);
+    
+    /* Initialise the AVCodecContext */
+    init_codec_ctx(&avctx, &wfx);
+
+    if (wmavoice_decode_init(&avctx) < 0) {
+        LOGF("(WMA Voice) Error: Unsupported or corrupt file\n");
+        retval = CODEC_ERROR;
+        goto done;
+    }
+
+    /* Now advance the file position to the first frame */
+    ci->seek_buffer(ci->id3->first_frame_offset);
+    
+    elapsedtime = 0;
+    resume_offset = 0;
+    
+    /* The main decoding loop */
+
+    while (pktcnt < wfx.numpackets)
+    {
+        ci->yield();
+        if (ci->stop_codec || ci->new_track) {
+            goto done;
+        }
+        
+        /* Deal with any pending seek requests */
+        if (ci->seek_time){
+
+            if (ci->seek_time == 1) {
+                ci->seek_complete();
+                goto restart_track; /* Pretend you never saw this... */
+            }
+
+            elapsedtime = asf_seek(ci->seek_time, &wfx);
+            if (elapsedtime < 1){
+                ci->seek_complete();
+                goto next_track;
+            }
+
+            ci->set_elapsed(elapsedtime);
+            ci->seek_complete();
+        }
+        
+new_packet:
+        res = asf_read_packet(&audiobuf, &audiobufsize, &packetlength, &wfx);
+
+        if (res < 0) {
+            LOGF("(WMA Voice) read_packet error %d\n",res);
+            goto done;
+        } else {
+            avpkt.data = audiobuf;
+            avpkt.size = audiobufsize;
+            pktcnt++;
+            
+            while(avpkt.size > 0)
+            {
+                /* wmavoice_decode_packet checks for the output buffer size to 
+                   avoid overflows */
+                outlen = BUFSIZE*sizeof(int32_t);
+
+                res = wmavoice_decode_packet(&avctx, decoded, &outlen, &avpkt);
+                if(res < 0) {
+                    LOGF("(WMA Voice) Error: decode_packet returned %d", res);
+                    if(res == ERROR_WMAPRO_IN_WMAVOICE){
+                    /* Just skip this packet */
+                        ci->advance_buffer(packetlength);
+                        goto new_packet;    
+                    }
+                    else
+                        goto done;
+                }
+                avpkt.data += res;
+                avpkt.size -= res;
+                if(outlen) {
+                    ci->yield ();
+                    outlen /= sizeof(int32_t);
+                    ci->pcmbuf_insert(decoded, NULL, outlen);
+                    elapsedtime += outlen*10/(wfx.rate/100);
+                    ci->set_elapsed(elapsedtime);
+                    ci->yield ();
+                }
+            }
+
+        }
+
+        /* Advance to the next logical packet */
+        ci->advance_buffer(packetlength);
+    }
+    retval = CODEC_OK;
+
+done:
+    if (ci->request_next_track())
+        goto next_track;
+    
+    return retval;
+}
+