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#ifndef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib.h>
#include <string.h>
#include "buffer.h"
#include "debug.h"
static void audioresample_buffer_free_mem (AudioresampleBuffer * buffer,
void *);
static void audioresample_buffer_free_subbuffer (AudioresampleBuffer * buffer,
void *priv);
AudioresampleBuffer *
audioresample_buffer_new (void)
{
AudioresampleBuffer *buffer;
buffer = g_new0 (AudioresampleBuffer, 1);
buffer->ref_count = 1;
return buffer;
}
AudioresampleBuffer *
audioresample_buffer_new_and_alloc (int size)
{
AudioresampleBuffer *buffer = audioresample_buffer_new ();
buffer->data = g_malloc (size);
buffer->length = size;
buffer->free = audioresample_buffer_free_mem;
return buffer;
}
AudioresampleBuffer *
audioresample_buffer_new_with_data (void *data, int size)
{
AudioresampleBuffer *buffer = audioresample_buffer_new ();
buffer->data = data;
buffer->length = size;
buffer->free = audioresample_buffer_free_mem;
return buffer;
}
AudioresampleBuffer *
audioresample_buffer_new_subbuffer (AudioresampleBuffer * buffer, int offset,
int length)
{
AudioresampleBuffer *subbuffer = audioresample_buffer_new ();
if (buffer->parent) {
audioresample_buffer_ref (buffer->parent);
subbuffer->parent = buffer->parent;
} else {
audioresample_buffer_ref (buffer);
subbuffer->parent = buffer;
}
subbuffer->data = buffer->data + offset;
subbuffer->length = length;
subbuffer->free = audioresample_buffer_free_subbuffer;
return subbuffer;
}
void
audioresample_buffer_ref (AudioresampleBuffer * buffer)
{
buffer->ref_count++;
}
void
audioresample_buffer_unref (AudioresampleBuffer * buffer)
{
buffer->ref_count--;
if (buffer->ref_count == 0) {
if (buffer->free)
buffer->free (buffer, buffer->priv);
g_free (buffer);
}
}
static void
audioresample_buffer_free_mem (AudioresampleBuffer * buffer, void *priv)
{
g_free (buffer->data);
}
static void
audioresample_buffer_free_subbuffer (AudioresampleBuffer * buffer, void *priv)
{
audioresample_buffer_unref (buffer->parent);
}
AudioresampleBufferQueue *
audioresample_buffer_queue_new (void)
{
return g_new0 (AudioresampleBufferQueue, 1);
}
int
audioresample_buffer_queue_get_depth (AudioresampleBufferQueue * queue)
{
return queue->depth;
}
int
audioresample_buffer_queue_get_offset (AudioresampleBufferQueue * queue)
{
return queue->offset;
}
void
audioresample_buffer_queue_free (AudioresampleBufferQueue * queue)
{
GList *g;
for (g = g_list_first (queue->buffers); g; g = g_list_next (g)) {
audioresample_buffer_unref ((AudioresampleBuffer *) g->data);
}
g_list_free (queue->buffers);
g_free (queue);
}
void
audioresample_buffer_queue_push (AudioresampleBufferQueue * queue,
AudioresampleBuffer * buffer)
{
queue->buffers = g_list_append (queue->buffers, buffer);
queue->depth += buffer->length;
}
AudioresampleBuffer *
audioresample_buffer_queue_pull (AudioresampleBufferQueue * queue, int length)
{
GList *g;
AudioresampleBuffer *newbuffer;
AudioresampleBuffer *buffer;
AudioresampleBuffer *subbuffer;
g_return_val_if_fail (length > 0, NULL);
if (queue->depth < length) {
return NULL;
}
RESAMPLE_LOG ("pulling %d, %d available", length, queue->depth);
g = g_list_first (queue->buffers);
buffer = g->data;
if (buffer->length > length) {
newbuffer = audioresample_buffer_new_subbuffer (buffer, 0, length);
subbuffer = audioresample_buffer_new_subbuffer (buffer, length,
buffer->length - length);
g->data = subbuffer;
audioresample_buffer_unref (buffer);
} else {
int offset = 0;
newbuffer = audioresample_buffer_new_and_alloc (length);
while (offset < length) {
g = g_list_first (queue->buffers);
buffer = g->data;
if (buffer->length > length - offset) {
int n = length - offset;
memcpy (newbuffer->data + offset, buffer->data, n);
subbuffer =
audioresample_buffer_new_subbuffer (buffer, n, buffer->length - n);
g->data = subbuffer;
audioresample_buffer_unref (buffer);
offset += n;
} else {
memcpy (newbuffer->data + offset, buffer->data, buffer->length);
queue->buffers = g_list_delete_link (queue->buffers, g);
offset += buffer->length;
audioresample_buffer_unref (buffer);
}
}
}
queue->depth -= length;
queue->offset += length;
return newbuffer;
}
AudioresampleBuffer *
audioresample_buffer_queue_peek (AudioresampleBufferQueue * queue, int length)
{
GList *g;
AudioresampleBuffer *newbuffer;
AudioresampleBuffer *buffer;
int offset = 0;
g_return_val_if_fail (length > 0, NULL);
if (queue->depth < length) {
return NULL;
}
RESAMPLE_LOG ("peeking %d, %d available", length, queue->depth);
g = g_list_first (queue->buffers);
buffer = g->data;
if (buffer->length > length) {
newbuffer = audioresample_buffer_new_subbuffer (buffer, 0, length);
} else {
newbuffer = audioresample_buffer_new_and_alloc (length);
while (offset < length) {
buffer = g->data;
if (buffer->length > length - offset) {
int n = length - offset;
memcpy (newbuffer->data + offset, buffer->data, n);
offset += n;
} else {
memcpy (newbuffer->data + offset, buffer->data, buffer->length);
offset += buffer->length;
}
g = g_list_next (g);
}
}
return newbuffer;
}
void
audioresample_buffer_queue_flush (AudioresampleBufferQueue * queue)
{
GList *g;
for (g = g_list_first (queue->buffers); g; g = g_list_next (g)) {
audioresample_buffer_unref ((AudioresampleBuffer *) g->data);
}
g_list_free (queue->buffers);
queue->buffers = NULL;
queue->depth = 0;
queue->offset = 0;
}
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