mirror of
https://github.com/libretro/RetroArch.git
synced 2024-11-25 08:59:58 +00:00
302 lines
7.7 KiB
C
302 lines
7.7 KiB
C
/* RetroArch - A frontend for libretro.
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <malloc.h>
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#include <stdint.h>
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#include<libtransistor/nx.h>
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#include<libtransistor/alloc_pages.h>
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#include "../audio_driver.h"
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#include "../../verbosity.h"
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static const int sample_rate = 48000;
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static const int max_num_samples = sample_rate;
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static const int num_channels = 2;
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static const size_t sample_buffer_size = ((max_num_samples * num_channels * sizeof(uint16_t)) + 0xfff) & ~0xfff;
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typedef struct
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{
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audio_output_t output;
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handle_t event;
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audio_output_buffer_t buffers[3];
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audio_output_buffer_t *current_buffer;
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bool blocking;
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bool is_paused;
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uint64_t last_append;
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unsigned latency;
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} switch_audio_t;
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static ssize_t switch_audio_write(void *data, const void *buf, size_t size)
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{
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size_t to_write = size;
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switch_audio_t *swa = (switch_audio_t*) data;
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#if 0
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RARCH_LOG("write %ld samples\n", size/sizeof(uint16_t));
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#endif
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if (!swa->current_buffer)
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{
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uint32_t num;
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if (audio_ipc_output_get_released_buffer(&swa->output, &num, &swa->current_buffer) != RESULT_OK)
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{
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RARCH_LOG("Failed to get released buffer?\n");
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return -1;
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}
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#if 0
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RARCH_LOG("got buffer, num %d, ptr %p\n", num, swa->current_buffer);
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#endif
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if (num < 1)
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swa->current_buffer = NULL;
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if (!swa->current_buffer)
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{
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if (swa->blocking)
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{
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RARCH_LOG("No buffer, blocking...\n");
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while(swa->current_buffer == NULL)
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{
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uint32_t num;
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uint32_t handle_idx;
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svcWaitSynchronization(&handle_idx, &swa->event, 1, 33333333);
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svcResetSignal(swa->event);
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if (audio_ipc_output_get_released_buffer(&swa->output, &num, &swa->current_buffer) != RESULT_OK)
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return -1;
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}
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} else {
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/* no buffer, nonblocking... */
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return 0;
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}
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}
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swa->current_buffer->data_size = 0;
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}
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if (to_write > sample_buffer_size - swa->current_buffer->data_size)
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to_write = sample_buffer_size - swa->current_buffer->data_size;
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memcpy(((uint8_t*) swa->current_buffer->sample_data) + swa->current_buffer->data_size, buf, to_write);
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swa->current_buffer->data_size += to_write;
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swa->current_buffer->buffer_size = sample_buffer_size;
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if (swa->current_buffer->data_size > (48000*swa->latency)/1000)
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{
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result_t r = audio_ipc_output_append_buffer(&swa->output, swa->current_buffer);
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if (r != RESULT_OK)
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{
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RARCH_ERR("failed to append buffer: 0x%x\n", r);
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return -1;
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}
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swa->current_buffer = NULL;
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}
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#if 0
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RARCH_LOG("submitted %ld samples, %ld samples since last submit\n",
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to_write/num_channels/sizeof(uint16_t),
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(svcGetSystemTick() - swa->last_append) * sample_rate / 19200000);
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#endif
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swa->last_append = svcGetSystemTick();
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return to_write;
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}
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static bool switch_audio_stop(void *data)
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{
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switch_audio_t *swa = (switch_audio_t*) data;
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if (!swa)
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return false;
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if(!swa->is_paused) {
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if(audio_ipc_output_stop(&swa->output) != RESULT_OK)
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return false;
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}
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swa->is_paused = true;
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return true;
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}
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static bool switch_audio_start(void *data, bool is_shutdown)
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{
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switch_audio_t *swa = (switch_audio_t*) data;
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if(swa->is_paused) {
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if (audio_ipc_output_start(&swa->output) != RESULT_OK)
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return false;
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}
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swa->is_paused = false;
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return true;
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}
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static bool switch_audio_alive(void *data)
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{
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switch_audio_t *swa = (switch_audio_t*) data;
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if (!swa)
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return false;
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return !swa->is_paused;
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}
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static void switch_audio_free(void *data)
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{
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switch_audio_t *swa = (switch_audio_t*) data;
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audio_ipc_output_close(&swa->output);
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audio_ipc_finalize();
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free(swa);
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}
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static bool switch_audio_use_float(void *data)
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{
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(void) data;
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return false; /* force INT16 */
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}
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static size_t switch_audio_write_avail(void *data)
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{
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switch_audio_t *swa = (switch_audio_t*) data;
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if (!swa || !swa->current_buffer)
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return 0;
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return swa->current_buffer->buffer_size;
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}
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static void switch_audio_set_nonblock_state(void *data, bool state)
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{
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switch_audio_t *swa = (switch_audio_t*) data;
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if (swa)
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swa->blocking = !state;
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}
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static void *switch_audio_init(const char *device,
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unsigned rate, unsigned latency,
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unsigned block_frames,
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unsigned *new_rate)
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{
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result_t r;
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unsigned i;
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char names[8][0x20];
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uint32_t num_names = 0;
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switch_audio_t *swa = (switch_audio_t*) calloc(1, sizeof(*swa));
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if (!swa)
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return NULL;
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r = audio_ipc_init();
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if (r != RESULT_OK)
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goto fail;
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if (audio_ipc_list_outputs(&names[0], 8, &num_names) != RESULT_OK)
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goto fail_audio_ipc;
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if (num_names != 1)
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{
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RARCH_ERR("got back more than one AudioOut\n");
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goto fail_audio_ipc;
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}
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if (audio_ipc_open_output(names[0], &swa->output) != RESULT_OK)
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goto fail_audio_ipc;
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if (swa->output.sample_rate != sample_rate)
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{
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RARCH_ERR("expected sample rate of %d, got sample rate of %d\n",
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sample_rate, swa->output.sample_rate);
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goto fail_audio_output;
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}
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if (swa->output.num_channels != num_channels)
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{
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RARCH_ERR("expected %d channels, got %d\n", num_channels,
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swa->output.num_channels);
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goto fail_audio_output;
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}
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if (swa->output.sample_format != PCM_INT16)
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{
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RARCH_ERR("expected PCM_INT16, got %d\n", swa->output.sample_format);
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goto fail_audio_output;
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}
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if (audio_ipc_output_register_buffer_event(&swa->output, &swa->event) != RESULT_OK)
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goto fail_audio_output;
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swa->blocking = block_frames;
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*new_rate = swa->output.sample_rate;
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for(i = 0; i < 3; i++)
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{
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swa->buffers[i].ptr = &swa->buffers[i].sample_data;
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swa->buffers[i].sample_data = alloc_pages(sample_buffer_size, sample_buffer_size, NULL);
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swa->buffers[i].buffer_size = sample_buffer_size;
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swa->buffers[i].data_size = sample_buffer_size;
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swa->buffers[i].unknown = 0;
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if(swa->buffers[i].sample_data == NULL)
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goto fail_audio_output;
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if (audio_ipc_output_append_buffer(&swa->output, &swa->buffers[i]) != RESULT_OK)
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goto fail_audio_output;
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}
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swa->current_buffer = NULL;
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swa->latency = latency;
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swa->last_append = svcGetSystemTick();
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swa->is_paused = true;
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return swa;
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fail_audio_output:
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audio_ipc_output_close(&swa->output);
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fail_audio_ipc:
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audio_ipc_finalize();
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fail:
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free(swa);
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return NULL;
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}
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static size_t switch_audio_buffer_size(void *data)
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{
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(void) data;
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return sample_buffer_size;
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}
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audio_driver_t audio_switch = {
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switch_audio_init,
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switch_audio_write,
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switch_audio_stop,
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switch_audio_start,
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switch_audio_alive,
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switch_audio_set_nonblock_state,
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switch_audio_free,
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switch_audio_use_float,
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"switch",
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NULL, /* device_list_new */
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NULL, /* device_list_free */
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switch_audio_write_avail,
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switch_audio_buffer_size, /* buffer_size */
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};
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