Revise the PCM callback system after adding multichannel audio.

Additional status callback is added to pcm_play/rec_data instead of
using a special function to set it. Status includes DMA error
reporting to the status callback. Playback and recording callback
become more alike except playback uses "const void **addr" (because
the data should not be altered) and recording  uses "void **addr".
"const" is put in place throughout where appropriate.

Most changes are fairly trivial. One that should be checked in
particular because it isn't so much is telechips, if anyone cares to
bother. PP5002 is not so trivial either but that tested as working.

Change-Id: I4928d69b3b3be7fb93e259f81635232df9bd1df2
Reviewed-on: http://gerrit.rockbox.org/166
Reviewed-by: Michael Sevakis <jethead71@rockbox.org>
Tested-by: Michael Sevakis <jethead71@rockbox.org>

1 files changed, 3 insertions, 5 deletions

diff --git a/firmware/target/arm/tms320dm320/mrobe-500/pcm-mr500.c b/firmware/target/arm/tms320dm320/mrobe-500/pcm-mr500.c
index 91d6b66130..d23c93de39 100644
--- a/firmware/target/arm/tms320dm320/mrobe-500/pcm-mr500.c
+++ b/firmware/target/arm/tms320dm320/mrobe-500/pcm-mr500.c
@@ -33,7 +33,7 @@
 /* This is global to save some latency when pcm_play_dma_get_peak_buffer is 
  *  called.
  */
-static void *start;
+static const void *start;
 
 void pcm_play_dma_postinit(void)
 {
@@ -164,9 +164,7 @@ void DSPHINT(void)
         
     case MSG_REFILL:
         /* Buffer empty.  Try to get more. */
-        pcm_play_get_more_callback(&start, &size);
-
-        if (size != 0)
+        if (pcm_play_dma_complete_callback(PCM_DMAST_OK, &start, &size))
         {
             unsigned long sdem_addr=(unsigned long)start - CONFIG_SDRAM_START;
             /* Flush any pending cache writes */
@@ -180,7 +178,7 @@ void DSPHINT(void)
             DEBUGF("pcm_sdram at 0x%08lx, sdem_addr 0x%08lx",
                 (unsigned long)start, (unsigned long)sdem_addr);
 
-            pcm_play_dma_started_callback();
+            pcm_play_dma_status_callback(PCM_DMAST_STARTED);
         }
         
         break;