464 lines
13 KiB
C++
464 lines
13 KiB
C++
/*
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* BeOS audio play interface
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* Copyright (c) 2000, 2001 Fabrice Bellard.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <signal.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <Application.h>
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#include <SoundPlayer.h>
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extern "C" {
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#include "avformat.h"
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}
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#ifdef HAVE_BSOUNDRECORDER
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#include <SoundRecorder.h>
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using namespace BPrivate::Media::Experimental;
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#endif
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/* enable performance checks */
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//#define PERF_CHECK
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/* enable Media Kit latency checks */
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//#define LATENCY_CHECK
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#define AUDIO_BLOCK_SIZE 4096
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#define AUDIO_BLOCK_COUNT 8
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#define AUDIO_BUFFER_SIZE (AUDIO_BLOCK_SIZE*AUDIO_BLOCK_COUNT)
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typedef struct {
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int fd; // UNUSED
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int sample_rate;
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int channels;
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int frame_size; /* in bytes ! */
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CodecID codec_id;
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uint8_t buffer[AUDIO_BUFFER_SIZE];
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int buffer_ptr;
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/* ring buffer */
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sem_id input_sem;
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int input_index;
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sem_id output_sem;
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int output_index;
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BSoundPlayer *player;
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#ifdef HAVE_BSOUNDRECORDER
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BSoundRecorder *recorder;
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#endif
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int has_quit; /* signal callbacks not to wait */
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volatile bigtime_t starve_time;
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} AudioData;
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static thread_id main_thid;
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static thread_id bapp_thid;
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static int own_BApp_created = 0;
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static int refcount = 0;
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/* create the BApplication and Run() it */
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static int32 bapp_thread(void *arg)
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{
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new BApplication("application/x-vnd.ffmpeg");
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own_BApp_created = 1;
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be_app->Run();
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/* kill the process group */
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// kill(0, SIGINT);
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// kill(main_thid, SIGHUP);
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return B_OK;
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}
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/* create the BApplication only if needed */
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static void create_bapp_if_needed(void)
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{
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if (refcount++ == 0) {
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/* needed by libmedia */
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if (be_app == NULL) {
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bapp_thid = spawn_thread(bapp_thread, "ffmpeg BApplication", B_NORMAL_PRIORITY, NULL);
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resume_thread(bapp_thid);
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while (!own_BApp_created)
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snooze(50000);
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}
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}
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}
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static void destroy_bapp_if_needed(void)
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{
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if (--refcount == 0 && own_BApp_created) {
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be_app->Lock();
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be_app->Quit();
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be_app = NULL;
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}
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}
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/* called back by BSoundPlayer */
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static void audioplay_callback(void *cookie, void *buffer, size_t bufferSize, const media_raw_audio_format &format)
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{
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AudioData *s;
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size_t len, amount;
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unsigned char *buf = (unsigned char *)buffer;
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s = (AudioData *)cookie;
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if (s->has_quit)
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return;
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while (bufferSize > 0) {
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#ifdef PERF_CHECK
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bigtime_t t;
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t = system_time();
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#endif
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len = MIN(AUDIO_BLOCK_SIZE, bufferSize);
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if (acquire_sem_etc(s->output_sem, len, B_CAN_INTERRUPT, 0LL) < B_OK) {
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s->has_quit = 1;
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s->player->SetHasData(false);
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return;
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}
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amount = MIN(len, (AUDIO_BUFFER_SIZE - s->output_index));
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memcpy(buf, &s->buffer[s->output_index], amount);
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s->output_index += amount;
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if (s->output_index >= AUDIO_BUFFER_SIZE) {
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s->output_index %= AUDIO_BUFFER_SIZE;
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memcpy(buf + amount, &s->buffer[s->output_index], len - amount);
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s->output_index += len-amount;
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s->output_index %= AUDIO_BUFFER_SIZE;
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}
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release_sem_etc(s->input_sem, len, 0);
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#ifdef PERF_CHECK
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t = system_time() - t;
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s->starve_time = MAX(s->starve_time, t);
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#endif
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buf += len;
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bufferSize -= len;
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}
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}
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#ifdef HAVE_BSOUNDRECORDER
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/* called back by BSoundRecorder */
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static void audiorecord_callback(void *cookie, bigtime_t timestamp, void *buffer, size_t bufferSize, const media_multi_audio_format &format)
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{
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AudioData *s;
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size_t len, amount;
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unsigned char *buf = (unsigned char *)buffer;
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s = (AudioData *)cookie;
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if (s->has_quit)
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return;
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while (bufferSize > 0) {
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len = MIN(bufferSize, AUDIO_BLOCK_SIZE);
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//printf("acquire_sem(input, %d)\n", len);
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if (acquire_sem_etc(s->input_sem, len, B_CAN_INTERRUPT, 0LL) < B_OK) {
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s->has_quit = 1;
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return;
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}
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amount = MIN(len, (AUDIO_BUFFER_SIZE - s->input_index));
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memcpy(&s->buffer[s->input_index], buf, amount);
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s->input_index += amount;
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if (s->input_index >= AUDIO_BUFFER_SIZE) {
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s->input_index %= AUDIO_BUFFER_SIZE;
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memcpy(&s->buffer[s->input_index], buf + amount, len - amount);
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s->input_index += len - amount;
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}
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release_sem_etc(s->output_sem, len, 0);
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//printf("release_sem(output, %d)\n", len);
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buf += len;
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bufferSize -= len;
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}
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}
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#endif
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static int audio_open(AudioData *s, int is_output, const char *audio_device)
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{
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int p[2];
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int ret;
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media_raw_audio_format format;
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media_multi_audio_format iformat;
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#ifndef HAVE_BSOUNDRECORDER
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if (!is_output)
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return -EIO; /* not for now */
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#endif
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s->input_sem = create_sem(AUDIO_BUFFER_SIZE, "ffmpeg_ringbuffer_input");
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if (s->input_sem < B_OK)
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return -EIO;
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s->output_sem = create_sem(0, "ffmpeg_ringbuffer_output");
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if (s->output_sem < B_OK) {
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delete_sem(s->input_sem);
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return -EIO;
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}
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s->input_index = 0;
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s->output_index = 0;
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create_bapp_if_needed();
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s->frame_size = AUDIO_BLOCK_SIZE;
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/* bump up the priority (avoid realtime though) */
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set_thread_priority(find_thread(NULL), B_DISPLAY_PRIORITY+1);
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#ifdef HAVE_BSOUNDRECORDER
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if (!is_output) {
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bool wait_for_input = false;
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if (audio_device && !strcmp(audio_device, "wait:"))
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wait_for_input = true;
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s->recorder = new BSoundRecorder(&iformat, wait_for_input, "ffmpeg input", audiorecord_callback);
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if (wait_for_input && (s->recorder->InitCheck() == B_OK)) {
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s->recorder->WaitForIncomingConnection(&iformat);
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}
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if (s->recorder->InitCheck() != B_OK || iformat.format != media_raw_audio_format::B_AUDIO_SHORT) {
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delete s->recorder;
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s->recorder = NULL;
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if (s->input_sem)
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delete_sem(s->input_sem);
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if (s->output_sem)
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delete_sem(s->output_sem);
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return -EIO;
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}
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s->codec_id = (iformat.byte_order == B_MEDIA_LITTLE_ENDIAN)?CODEC_ID_PCM_S16LE:CODEC_ID_PCM_S16BE;
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s->channels = iformat.channel_count;
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s->sample_rate = (int)iformat.frame_rate;
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s->frame_size = iformat.buffer_size;
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s->recorder->SetCookie(s);
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s->recorder->SetVolume(1.0);
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s->recorder->Start();
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return 0;
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}
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#endif
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format = media_raw_audio_format::wildcard;
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format.format = media_raw_audio_format::B_AUDIO_SHORT;
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format.byte_order = B_HOST_IS_LENDIAN ? B_MEDIA_LITTLE_ENDIAN : B_MEDIA_BIG_ENDIAN;
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format.channel_count = s->channels;
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format.buffer_size = s->frame_size;
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format.frame_rate = s->sample_rate;
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s->player = new BSoundPlayer(&format, "ffmpeg output", audioplay_callback);
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if (s->player->InitCheck() != B_OK) {
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delete s->player;
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s->player = NULL;
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if (s->input_sem)
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delete_sem(s->input_sem);
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if (s->output_sem)
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delete_sem(s->output_sem);
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return -EIO;
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}
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s->player->SetCookie(s);
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s->player->SetVolume(1.0);
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s->player->Start();
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s->player->SetHasData(true);
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return 0;
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}
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static int audio_close(AudioData *s)
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{
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if (s->input_sem)
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delete_sem(s->input_sem);
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if (s->output_sem)
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delete_sem(s->output_sem);
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s->has_quit = 1;
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if (s->player) {
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s->player->Stop();
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}
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if (s->player)
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delete s->player;
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#ifdef HAVE_BSOUNDRECORDER
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if (s->recorder)
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delete s->recorder;
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#endif
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destroy_bapp_if_needed();
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return 0;
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}
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/* sound output support */
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static int audio_write_header(AVFormatContext *s1)
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{
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AudioData *s = (AudioData *)s1->priv_data;
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AVStream *st;
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int ret;
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st = s1->streams[0];
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s->sample_rate = st->codec.sample_rate;
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s->channels = st->codec.channels;
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ret = audio_open(s, 1, NULL);
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if (ret < 0)
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return -EIO;
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return 0;
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}
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static int audio_write_packet(AVFormatContext *s1, int stream_index,
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uint8_t *buf, int size, int force_pts)
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{
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AudioData *s = (AudioData *)s1->priv_data;
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int len, ret;
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#ifdef LATENCY_CHECK
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bigtime_t lat1, lat2;
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lat1 = s->player->Latency();
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#endif
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#ifdef PERF_CHECK
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bigtime_t t = s->starve_time;
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s->starve_time = 0;
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printf("starve_time: %lld \n", t);
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#endif
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while (size > 0) {
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int amount;
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len = MIN(size, AUDIO_BLOCK_SIZE);
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if (acquire_sem_etc(s->input_sem, len, B_CAN_INTERRUPT, 0LL) < B_OK)
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return -EIO;
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amount = MIN(len, (AUDIO_BUFFER_SIZE - s->input_index));
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memcpy(&s->buffer[s->input_index], buf, amount);
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s->input_index += amount;
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if (s->input_index >= AUDIO_BUFFER_SIZE) {
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s->input_index %= AUDIO_BUFFER_SIZE;
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memcpy(&s->buffer[s->input_index], buf + amount, len - amount);
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s->input_index += len - amount;
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}
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release_sem_etc(s->output_sem, len, 0);
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buf += len;
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size -= len;
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}
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#ifdef LATENCY_CHECK
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lat2 = s->player->Latency();
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printf("#### BSoundPlayer::Latency(): before= %lld, after= %lld\n", lat1, lat2);
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#endif
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return 0;
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}
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static int audio_write_trailer(AVFormatContext *s1)
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{
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AudioData *s = (AudioData *)s1->priv_data;
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audio_close(s);
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return 0;
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}
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/* grab support */
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static int audio_read_header(AVFormatContext *s1, AVFormatParameters *ap)
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{
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AudioData *s = (AudioData *)s1->priv_data;
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AVStream *st;
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int ret;
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if (!ap || ap->sample_rate <= 0 || ap->channels <= 0)
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return -1;
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st = av_new_stream(s1, 0);
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if (!st) {
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return -ENOMEM;
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}
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s->sample_rate = ap->sample_rate;
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s->channels = ap->channels;
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ret = audio_open(s, 0, ap->device);
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if (ret < 0) {
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av_free(st);
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return -EIO;
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}
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/* take real parameters */
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st->codec.codec_type = CODEC_TYPE_AUDIO;
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st->codec.codec_id = s->codec_id;
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st->codec.sample_rate = s->sample_rate;
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st->codec.channels = s->channels;
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return 0;
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av_set_pts_info(s1, 48, 1, 1000000); /* 48 bits pts in us */
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}
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static int audio_read_packet(AVFormatContext *s1, AVPacket *pkt)
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{
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AudioData *s = (AudioData *)s1->priv_data;
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int size;
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size_t len, amount;
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unsigned char *buf;
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status_t err;
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if (av_new_packet(pkt, s->frame_size) < 0)
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return -EIO;
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buf = (unsigned char *)pkt->data;
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size = pkt->size;
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while (size > 0) {
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len = MIN(AUDIO_BLOCK_SIZE, size);
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//printf("acquire_sem(output, %d)\n", len);
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while ((err=acquire_sem_etc(s->output_sem, len, B_CAN_INTERRUPT, 0LL)) == B_INTERRUPTED);
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if (err < B_OK) {
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av_free_packet(pkt);
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return -EIO;
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}
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amount = MIN(len, (AUDIO_BUFFER_SIZE - s->output_index));
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memcpy(buf, &s->buffer[s->output_index], amount);
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s->output_index += amount;
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if (s->output_index >= AUDIO_BUFFER_SIZE) {
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s->output_index %= AUDIO_BUFFER_SIZE;
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memcpy(buf + amount, &s->buffer[s->output_index], len - amount);
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s->output_index += len-amount;
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s->output_index %= AUDIO_BUFFER_SIZE;
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}
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release_sem_etc(s->input_sem, len, 0);
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//printf("release_sem(input, %d)\n", len);
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buf += len;
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size -= len;
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}
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//XXX: add pts info
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return 0;
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}
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static int audio_read_close(AVFormatContext *s1)
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{
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AudioData *s = (AudioData *)s1->priv_data;
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audio_close(s);
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return 0;
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}
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static AVInputFormat audio_in_format = {
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"audio_device",
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"audio grab and output",
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sizeof(AudioData),
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NULL,
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audio_read_header,
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audio_read_packet,
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audio_read_close,
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NULL,
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AVFMT_NOFILE,
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};
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AVOutputFormat audio_out_format = {
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"audio_device",
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"audio grab and output",
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"",
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"",
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sizeof(AudioData),
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#ifdef WORDS_BIGENDIAN
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CODEC_ID_PCM_S16BE,
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#else
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CODEC_ID_PCM_S16LE,
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#endif
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CODEC_ID_NONE,
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audio_write_header,
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audio_write_packet,
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audio_write_trailer,
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AVFMT_NOFILE,
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};
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extern "C" {
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int audio_init(void)
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{
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main_thid = find_thread(NULL);
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av_register_input_format(&audio_in_format);
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av_register_output_format(&audio_out_format);
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return 0;
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}
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} // "C"
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