+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2013 Google, Inc
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <errno.h>
+#include <unistd.h>
#include <linux/input.h>
#include <SDL/SDL.h>
#include <sound.h>
#include <asm/state.h>
+enum {
+ SAMPLE_RATE = 22050,
+};
+
+/**
+ * struct buf_info - a data buffer holding audio data
+ *
+ * @pos: Current position playing in audio buffer
+ * @size: Size of data in audio buffer (0=empty)
+ * @alloced: Allocated size of audio buffer (max size it can hold)
+ * @data: Audio data
+ */
+struct buf_info {
+ uint pos;
+ uint size;
+ uint alloced;
+ uint8_t *data;
+};
+
static struct sdl_info {
SDL_Surface *screen;
int width;
int depth;
int pitch;
uint frequency;
- uint audio_pos;
- uint audio_size;
- uint8_t *audio_data;
+ uint sample_rate;
bool audio_active;
bool inited;
+ int cur_buf;
+ struct buf_info buf[2];
+ bool running;
} sdl;
static void sandbox_sdl_poll_events(void)
void sandbox_sdl_fill_audio(void *udata, Uint8 *stream, int len)
{
+ struct buf_info *buf;
int avail;
+ int i;
- avail = sdl.audio_size - sdl.audio_pos;
- if (avail < len)
- len = avail;
-
- SDL_MixAudio(stream, sdl.audio_data + sdl.audio_pos, len,
- SDL_MIX_MAXVOLUME);
- sdl.audio_pos += len;
-
- /* Loop if we are at the end */
- if (sdl.audio_pos == sdl.audio_size)
- sdl.audio_pos = 0;
+ for (i = 0; i < 2; i++) {
+ buf = &sdl.buf[sdl.cur_buf];
+ avail = buf->size - buf->pos;
+ if (avail <= 0) {
+ sdl.cur_buf = 1 - sdl.cur_buf;
+ continue;
+ }
+ if (avail > len)
+ avail = len;
+
+ SDL_MixAudio(stream, buf->data + buf->pos, avail,
+ SDL_MIX_MAXVOLUME);
+ buf->pos += avail;
+ len -= avail;
+
+ /* Move to next buffer if we are at the end */
+ if (buf->pos == buf->size)
+ buf->size = 0;
+ else
+ break;
+ }
}
int sandbox_sdl_sound_init(void)
{
SDL_AudioSpec wanted;
+ int i;
if (sandbox_sdl_ensure_init())
return -1;
if (sdl.audio_active)
return 0;
- /*
- * At present all sandbox sounds crash. This is probably due to
- * symbol name conflicts with U-Boot. We can remove the malloc()
- * probles with:
- *
- * #define USE_DL_PREFIX
- *
- * and get this:
- *
- * Assertion 'e->pollfd->fd == e->fd' failed at pulse/mainloop.c:676,
- * function dispatch_pollfds(). Aborting.
- *
- * The right solution is probably to make U-Boot's names private or
- * link os.c and sdl.c against their libraries before liking with
- * U-Boot. TBD. For now sound is disabled.
- */
- printf("(Warning: sandbox sound disabled)\n");
- return 0;
-
/* Set the audio format */
- wanted.freq = 22050;
+ wanted.freq = SAMPLE_RATE;
wanted.format = AUDIO_S16;
wanted.channels = 1; /* 1 = mono, 2 = stereo */
wanted.samples = 1024; /* Good low-latency value for callback */
wanted.callback = sandbox_sdl_fill_audio;
wanted.userdata = NULL;
- sdl.audio_size = sizeof(uint16_t) * wanted.freq;
- sdl.audio_data = malloc(sdl.audio_size);
- if (!sdl.audio_data) {
- printf("%s: Out of memory\n", __func__);
- return -1;
+ for (i = 0; i < 2; i++) {
+ struct buf_info *buf = &sdl.buf[i];
+
+ buf->alloced = sizeof(uint16_t) * wanted.freq * wanted.channels;
+ buf->data = malloc(buf->alloced);
+ if (!buf->data) {
+ printf("%s: Out of memory\n", __func__);
+ if (i == 1)
+ free(sdl.buf[0].data);
+ return -1;
+ }
+ buf->pos = 0;
+ buf->size = 0;
}
- sdl.audio_pos = 0;
if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) {
printf("Unable to initialize SDL audio: %s\n", SDL_GetError());
goto err;
}
sdl.audio_active = true;
+ sdl.sample_rate = wanted.freq;
+ sdl.cur_buf = 0;
+ sdl.running = 0;
return 0;
err:
- free(sdl.audio_data);
+ for (i = 0; i < 2; i++)
+ free(sdl.buf[i].data);
return -1;
}
-int sandbox_sdl_sound_start(uint frequency)
+int sandbox_sdl_sound_play(const void *data, uint size)
{
+ struct buf_info *buf;
+
if (!sdl.audio_active)
- return -1;
- sdl.frequency = frequency;
- sound_create_square_wave((unsigned short *)sdl.audio_data,
- sdl.audio_size, frequency);
- sdl.audio_pos = 0;
- SDL_PauseAudio(0);
+ return 0;
+
+ buf = &sdl.buf[0];
+ if (buf->size)
+ buf = &sdl.buf[1];
+ while (buf->size)
+ usleep(1000);
+
+ if (size > buf->alloced)
+ return -E2BIG;
+
+ memcpy(buf->data, data, size);
+ buf->size = size;
+ buf->pos = 0;
+ if (!sdl.running) {
+ SDL_PauseAudio(0);
+ sdl.running = 1;
+ }
return 0;
}
int sandbox_sdl_sound_stop(void)
{
- if (!sdl.audio_active)
- return -1;
- SDL_PauseAudio(1);
+ if (sdl.running) {
+ SDL_PauseAudio(1);
+ sdl.running = 0;
+ }
return 0;
}
git.openpandora.org / pandora-u-boot.git / blobdiff