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- Anonymous
- Thursday, October 23rd, 2008 at 8:48:33am MDT
- Index: apps/pcmbuf.c
- ===================================================================
- --- apps/pcmbuf.c (revision 18859)
- +++ apps/pcmbuf.c (working copy)
- @@ -142,6 +142,7 @@
- * to the DMA. Finally the function checks the status of the buffer and
- * boosts if necessary */
- static void pcmbuf_callback(unsigned char** start, size_t* size) ICODE_ATTR;
- +#if 0
- static void pcmbuf_callback(unsigned char** start, size_t* size)
- {
- {
- @@ -189,7 +190,7 @@
- }
- }
- }
- -
- +#endif
- void pcmbuf_set_position_callback(void (*callback)(size_t size))
- {
- position_callback = callback;
- @@ -320,6 +321,7 @@
- bool pcmbuf_is_lowdata(void)
- {
- + return true;
- if (!pcm_is_playing() || pcm_is_paused() ||
- crossfade_init || crossfade_active)
- return false;
- @@ -474,7 +476,7 @@
- pcmbuf_crossfade_enable_finished();
- pcmbuf_play_stop();
- -
- + pcm_mixer_init();
- return pcmbuf_bufend - audiobuffer;
- }
- @@ -513,6 +515,8 @@
- /* Force playback. */
- void pcmbuf_play_start(void)
- {
- + pcm_mixer_play();
- + /*
- if (!pcm_is_playing() && pcmbuf_unplayed_bytes && pcmbuf_read != NULL)
- {
- last_chunksize = pcmbuf_read->size;
- @@ -520,6 +524,7 @@
- pcm_play_data(pcmbuf_callback,
- (unsigned char *)pcmbuf_read->addr, last_chunksize);
- }
- + */
- }
- /**
- @@ -861,7 +866,7 @@
- return true;
- }
- -
- +#if 0
- void* pcmbuf_request_buffer(int *count)
- {
- if (crossfade_init)
- @@ -895,7 +900,7 @@
- }
- }
- }
- -
- +#endif
- void * pcmbuf_request_voice_buffer(int *count)
- {
- /* A get-it-to-work-for-now hack (audio status could change by
- @@ -927,7 +932,7 @@
- {
- return crossfade_active || crossfade_init;
- }
- -
- +#if 0
- void pcmbuf_write_complete(int count)
- {
- size_t length = (size_t)(unsigned int)count << 2;
- @@ -946,7 +951,7 @@
- pcmbuf_flush_fillpos();
- }
- }
- -
- +#endif
- #if 0
- bool pcmbuf_insert_buffer(char *buf, int count)
- {
- @@ -1114,3 +1119,154 @@
- return crossfade_enabled;
- }
- +
- +/* stuff that needs reimplementing:
- + pcmbuf_request_buffer() - called to get a block to write to
- + pcmbuf_write_complete() - called once a pcm block has been finished writing to by the codec
- + pcmbuf_callback() - called by the ISR to get some pcm to output
- + */
- +
- +#define PCM_BLOCK_SIZE 8*1024*2*2 /* 8K samples */
- +#define MAX_PCM_BLOCKS 32
- +struct pcm_block {
- + unsigned char buf[PCM_BLOCK_SIZE];
- + unsigned int size;
- + struct pcm_block *next;
- +};
- +static struct pcm_block pcm_block_buffer[MAX_PCM_BLOCKS];
- +static int block_count = 0;
- +enum {
- + CHANNEL_AUDIO = 0,
- + // CHANNEL_VOICE,
- +
- + PCM_CHANNEL_COUNT,
- +};
- +struct pcm_mixer_channel {
- + struct pcm_block *head;
- + struct pcm_block *tail;
- + bool paused;
- +};
- +struct pcm_mixer_channel channels[PCM_CHANNEL_COUNT];
- +
- +struct pcm_block *get_free_block(void)
- +{
- + int i = 0;
- + struct pcm_block *ret;
- + while (i<MAX_PCM_BLOCKS)
- + {
- + ret = &pcm_block_buffer[i];
- + if (ret->size == 0) {
- + // printf("block %d\n", i);
- + return ret;
- + }
- + i++;
- + }
- + pcmbuf_play_start();
- + return NULL;
- +}
- +
- +void pcm_mixer_init(void)
- +{
- + int i = 0;
- + for (i=0; i<PCM_CHANNEL_COUNT; i++)
- + {
- + channels[i].head = NULL;
- + channels[i].tail = NULL;
- + channels[i].paused = false;
- + }
- + for (i=0; i<MAX_PCM_BLOCKS; i++)
- + {
- + pcm_block_buffer[i].size = 0;
- + }
- +}
- +
- +void* pcmbuf_request_buffer(int *count)
- +{
- + struct pcm_block *block, *tail;
- + int bytes = *count<<2;
- + tail = channels[CHANNEL_AUDIO].tail;
- + // printf("pcmbuf_request_buffer\n");
- + //printf("%d: \n", PCM_BLOCK_SIZE-tail->size);
- + if (tail && (PCM_BLOCK_SIZE-tail->size > 0))
- + {
- + bytes = MIN(bytes, (PCM_BLOCK_SIZE-tail->size));
- + *count = bytes>>2;
- + printf("%d %d\n", *count, bytes);
- + tail->size += bytes;
- + return tail->buf + tail->size;
- + }
- + block = get_free_block();
- + if (block == NULL)
- + return NULL;
- + block->next = NULL;
- + bytes = MIN(bytes, 512<<2);
- + //printf("%d %d\n", *count, *count>>2);
- + block->size = bytes;
- + *count = bytes>>2;
- + if (channels[CHANNEL_AUDIO].head == NULL)
- + channels[CHANNEL_AUDIO].head = block;
- + if (channels[CHANNEL_AUDIO].tail == NULL)
- + channels[CHANNEL_AUDIO].tail = block;
- + else
- + {
- + channels[CHANNEL_AUDIO].tail->next = block;
- + channels[CHANNEL_AUDIO].tail = block;
- + }
- + return block->buf;
- +}
- +
- +void pcmbuf_write_complete(int count)
- +{
- + // printf("pcmbuf_write_complete, %d\n", count);
- + block_count++;
- + //channels[CHANNEL_AUDIO].tail->size = count;
- +}
- +static bool playing = false;
- +void pcm_mixer_play(void)
- +{
- + struct pcm_mixer_channel *c = &channels[CHANNEL_AUDIO];
- + if (!c->paused && c->head != NULL && !playing && block_count > 0)
- + {
- + if (c->head == c->tail)
- + return;
- + pcm_play_data(pcmbuf_callback, channels[CHANNEL_AUDIO].head->buf, channels[CHANNEL_AUDIO].head->size);
- + playing = true;
- + }
- +}
- +
- +static void pcmbuf_callback(unsigned char** start, size_t* size)
- +{
- + struct pcm_block *block = NULL;
- + {
- + int last_size = channels[CHANNEL_AUDIO].head->size;
- + channels[CHANNEL_AUDIO].head->size = 0;
- + block = channels[CHANNEL_AUDIO].head->next;
- + channels[CHANNEL_AUDIO].head = block;
- + /* The buffer is finished, call the callback functions */
- + CALL_IF_EXISTS(position_callback, last_size);
- + CALL_IF_EXISTS(pcmbuf_event_handler);
- + block_count--;
- + }
- + {
- + /* mix all the channels that are ready */
- + // ... TODO
- + struct pcm_mixer_channel *c = &channels[CHANNEL_AUDIO];
- + if (!c->paused && c->head != NULL)
- + {
- + *start = c->head->buf;
- + *size = c->head->size;
- + }
- + else
- + {
- + *start = NULL;
- + *size = 0;
- + playing = false;
- + }
- + }
- +}
- +
- +
- +
- +
- +
- +
- \ No newline at end of file
- Index: apps/playback.c
- ===================================================================
- --- apps/playback.c (revision 18860)
- +++ apps/playback.c (working copy)
- @@ -904,7 +904,7 @@
- if (inp_count <= 0)
- return true;
- -
- +
- /* Input size has grown, no error, just don't write more than length */
- if (inp_count > count)
- inp_count = count;
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