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- /* RetroArch - A frontend for libretro.
- *
- * RetroArch 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 Found-
- * ation, either version 3 of the License, or (at your option) any later version.
- *
- * RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
- * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with RetroArch.
- * If not, see <http://www.gnu.org/licenses/>.
- */
- #include <stdio.h>
- #include <string.h>
- #include <malloc.h>
- #include <stdint.h>
- #include<libtransistor/nx.h>
- #include<libtransistor/alloc_pages.h>
- #include "../audio_driver.h"
- #include "../../verbosity.h"
- static const int sample_rate = 48000;
- static const int max_num_samples = sample_rate;
- static const int num_channels = 2;
- static const size_t sample_buffer_size = ((max_num_samples * num_channels * sizeof(uint16_t)) + 0xfff) & ~0xfff;
- typedef struct
- {
- audio_output_t output;
- handle_t event;
- audio_output_buffer_t buffers[3];
- audio_output_buffer_t *current_buffer;
- bool blocking;
- bool is_paused;
- bool pages_initialized;
- uint64_t last_append;
- unsigned latency;
- } switch_audio_t;
- static ssize_t switch_audio_write(void *data, const void *buf, size_t size)
- {
- size_t to_write = size;
- switch_audio_t *swa = (switch_audio_t*) data;
- #if 0
- RARCH_LOG("write %ld samples\n", size/sizeof(uint16_t));
- #endif
- if (!swa->current_buffer)
- {
- uint32_t num;
- if (swa->pages_initialized && audio_ipc_output_get_released_buffer(&swa->output, &num, &swa->current_buffer) != RESULT_OK)
- {
- RARCH_LOG("Failed to get released buffer?\n");
- return -1;
- } else {
- for(int i = 0; i < 3; i++)
- {
- swa->buffers[i].ptr = &swa->buffers[i].sample_data;
- swa->buffers[i].sample_data = alloc_pages(sample_buffer_size, sample_buffer_size, NULL);
- swa->buffers[i].buffer_size = sample_buffer_size;
- swa->buffers[i].data_size = sample_buffer_size;
- swa->buffers[i].unknown = 0;
- // audio_ipc_output_append_buffer(&swa->output, &swa->buffers[i]);
- }
- num = 1;
- swa->pages_initialized = true;
- }
- #if 0
- RARCH_LOG("got buffer, num %d, ptr %p\n", num, swa->current_buffer);
- #endif
- if (num < 1)
- swa->current_buffer = NULL;
- if (!swa->current_buffer)
- {
- if (swa->blocking)
- {
- RARCH_LOG("No buffer, blocking...\n");
- while(swa->current_buffer == NULL)
- {
- uint32_t num;
- uint32_t handle_idx;
- svcWaitSynchronization(&handle_idx, &swa->event, 1, 33333333);
- svcResetSignal(swa->event);
- if (audio_ipc_output_get_released_buffer(&swa->output, &num, &swa->current_buffer) != RESULT_OK)
- return -1;
- }
- } else {
- /* no buffer, nonblocking... */
- return 0;
- }
- }
- swa->current_buffer->data_size = 0;
- }
- if (to_write > sample_buffer_size - swa->current_buffer->data_size)
- to_write = sample_buffer_size - swa->current_buffer->data_size;
- memcpy(((uint8_t*) swa->current_buffer->sample_data) + swa->current_buffer->data_size, buf, to_write);
- swa->current_buffer->data_size += to_write;
- swa->current_buffer->buffer_size = sample_buffer_size;
- if (swa->current_buffer->data_size > (48000*swa->latency)/1000)
- {
- result_t r = audio_ipc_output_append_buffer(&swa->output, swa->current_buffer);
- if (r != RESULT_OK)
- {
- RARCH_ERR("failed to append buffer: 0x%x\n", r);
- return -1;
- }
- swa->current_buffer = NULL;
- }
- #if 0
- RARCH_LOG("submitted %ld samples, %ld samples since last submit\n",
- to_write/num_channels/sizeof(uint16_t),
- (svcGetSystemTick() - swa->last_append) * sample_rate / 19200000);
- #endif
- swa->last_append = svcGetSystemTick();
- return to_write;
- }
- static bool switch_audio_stop(void *data)
- {
- switch_audio_t *swa = (switch_audio_t*) data;
- if (!swa)
- return false;
- if(!swa->is_paused) {
- if(audio_ipc_output_stop(&swa->output) != RESULT_OK)
- return false;
- }
- swa->is_paused = true;
- return true;
- }
- static bool switch_audio_start(void *data, bool is_shutdown)
- {
- switch_audio_t *swa = (switch_audio_t*) data;
- if(swa->is_paused) {
- if (audio_ipc_output_start(&swa->output) != RESULT_OK)
- return false;
- }
- swa->is_paused = false;
- return true;
- }
- static bool switch_audio_alive(void *data)
- {
- switch_audio_t *swa = (switch_audio_t*) data;
- if (!swa)
- return false;
- return !swa->is_paused;
- }
- static void switch_audio_free(void *data)
- {
- switch_audio_t *swa = (switch_audio_t*) data;
- audio_ipc_output_close(&swa->output);
- audio_ipc_finalize();
- free(swa);
- }
- static bool switch_audio_use_float(void *data)
- {
- (void) data;
- return false; /* force INT16 */
- }
- static size_t switch_audio_write_avail(void *data)
- {
- switch_audio_t *swa = (switch_audio_t*) data;
- if (!swa || !swa->current_buffer)
- return 0;
- return swa->current_buffer->buffer_size;
- }
- static void switch_audio_set_nonblock_state(void *data, bool state)
- {
- switch_audio_t *swa = (switch_audio_t*) data;
- if (swa)
- swa->blocking = !state;
- }
- static void *switch_audio_init(const char *device,
- unsigned rate, unsigned latency,
- unsigned block_frames,
- unsigned *new_rate)
- {
- result_t r;
- unsigned i;
- char names[8][0x20];
- uint32_t num_names = 0;
- switch_audio_t *swa = (switch_audio_t*) calloc(1, sizeof(*swa));
- if (!swa)
- return NULL;
- r = audio_ipc_init();
- if (r != RESULT_OK)
- goto fail;
- if (audio_ipc_list_outputs(&names[0], 8, &num_names) != RESULT_OK)
- goto fail_audio_ipc;
- if (num_names != 1)
- {
- RARCH_ERR("got back more than one AudioOut\n");
- goto fail_audio_ipc;
- }
- if (audio_ipc_open_output(names[0], &swa->output) != RESULT_OK)
- goto fail_audio_ipc;
- if (swa->output.sample_rate != sample_rate)
- {
- RARCH_ERR("expected sample rate of %d, got sample rate of %d\n",
- sample_rate, swa->output.sample_rate);
- goto fail_audio_output;
- }
- if (swa->output.num_channels != num_channels)
- {
- RARCH_ERR("expected %d channels, got %d\n", num_channels,
- swa->output.num_channels);
- goto fail_audio_output;
- }
- if (swa->output.sample_format != PCM_INT16)
- {
- RARCH_ERR("expected PCM_INT16, got %d\n", swa->output.sample_format);
- goto fail_audio_output;
- }
- if (audio_ipc_output_register_buffer_event(&swa->output, &swa->event) != RESULT_OK)
- goto fail_audio_output;
- swa->blocking = block_frames;
- *new_rate = swa->output.sample_rate;
- swa->current_buffer = NULL;
- swa->latency = latency;
- swa->last_append = svcGetSystemTick();
- swa->is_paused = true;
- return swa;
- fail_audio_output:
- audio_ipc_output_close(&swa->output);
- fail_audio_ipc:
- audio_ipc_finalize();
- fail:
- free(swa);
- return NULL;
- }
- static size_t switch_audio_buffer_size(void *data)
- {
- (void) data;
- return sample_buffer_size;
- }
- audio_driver_t audio_switch = {
- switch_audio_init,
- switch_audio_write,
- switch_audio_stop,
- switch_audio_start,
- switch_audio_alive,
- switch_audio_set_nonblock_state,
- switch_audio_free,
- switch_audio_use_float,
- "switch",
- NULL, /* device_list_new */
- NULL, /* device_list_free */
- switch_audio_write_avail,
- switch_audio_buffer_size, /* buffer_size */
- };
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