323 lines
7.7 KiB
C++
323 lines
7.7 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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//const char *audio_device = "/dev/dsp";
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const char *audio_device = "beosaudio:";
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#define AUDIO_BLOCK_SIZE 4096
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typedef struct {
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int fd;
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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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int flip_left : 1;
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UINT8 buffer[AUDIO_BLOCK_SIZE];
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int buffer_ptr;
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int pipefd; /* the other end of the pipe */
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BSoundPlayer *player;
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int has_quit; /* signal callbacks not to wait */
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} AudioData;
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static int own_BApp_created = 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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return B_OK;
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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 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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if ((amount = read(s->pipefd, buf, bufferSize)) < B_OK) {
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puts("EPIPE");
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snooze(100000);
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s->player->SetHasData(false);
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return;
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}
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if (amount == 0) {
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snooze(100000);
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s->player->SetHasData(false);
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return;
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}
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buf += amount;
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bufferSize -= amount;
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}
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}
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static int audio_open(AudioData *s, int is_output)
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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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if (!is_output)
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return -EIO; /* not for now */
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ret = pipe(p);
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if (ret < 0)
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return -EIO;
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s->fd = p[is_output?1:0];
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s->pipefd = p[is_output?0:1];
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if (s->fd < 0) {
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perror(is_output?"audio out":"audio in");
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return -EIO;
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}
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/* non blocking mode */
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// fcntl(s->fd, F_SETFL, O_NONBLOCK);
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// fcntl(s->pipefd, F_SETFL, O_NONBLOCK);
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s->frame_size = AUDIO_BLOCK_SIZE;
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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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close(s->fd);
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close(s->pipefd);
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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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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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close(s->pipefd);
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close(s->fd);
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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);
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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 *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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while (size > 0) {
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len = AUDIO_BLOCK_SIZE - s->buffer_ptr;
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if (len > size)
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len = size;
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memcpy(s->buffer + s->buffer_ptr, buf, len);
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s->buffer_ptr += len;
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if (s->buffer_ptr >= AUDIO_BLOCK_SIZE) {
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for(;;) {
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snooze(1000);
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ret = write(s->fd, s->buffer, AUDIO_BLOCK_SIZE);
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if (ret != 0)
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break;
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if (ret < 0 && (errno != EAGAIN && errno != EINTR))
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return -EIO;
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}
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s->buffer_ptr = 0;
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}
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buf += len;
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size -= len;
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}
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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);
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if (ret < 0) {
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av_free(st);
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return -EIO;
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} else {
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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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}
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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 ret;
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if (av_new_packet(pkt, s->frame_size) < 0)
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return -EIO;
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for(;;) {
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ret = read(s->fd, pkt->data, pkt->size);
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if (ret > 0)
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break;
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if (ret == -1 && (errno == EAGAIN || errno == EINTR)) {
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av_free_packet(pkt);
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pkt->size = 0;
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return 0;
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}
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if (!(ret == 0 || (ret == -1 && (errno == EAGAIN || errno == EINTR)))) {
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av_free_packet(pkt);
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return -EIO;
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}
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}
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pkt->size = ret;
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if (s->flip_left && s->channels == 2) {
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int i;
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short *p = (short *) pkt->data;
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for (i = 0; i < ret; i += 4) {
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*p = ~*p;
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p += 2;
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}
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}
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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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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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/* needed by libmedia */
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if (be_app == NULL) {
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resume_thread(spawn_thread(bapp_thread, "ffmpeg BApplication", B_NORMAL_PRIORITY, NULL));
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while (!own_BApp_created)
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snooze(50000);
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}
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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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