X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftags%2Fsynfig_0_61_05%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavformat%2Faudio.c;fp=synfig-core%2Ftags%2Fsynfig_0_61_05%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavformat%2Faudio.c;h=0000000000000000000000000000000000000000;hb=6fa8f2f38d4b0b35f8539bf94e27ae27015c7689;hp=3662e458ffd0fc5e0080cae20108c04fee2e55a9;hpb=47fce282611fbba1044921d22ca887f9b53ad91a;p=synfig.git diff --git a/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavformat/audio.c b/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavformat/audio.c deleted file mode 100644 index 3662e45..0000000 --- a/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavformat/audio.c +++ /dev/null @@ -1,343 +0,0 @@ -/* - * Linux audio play and grab interface - * Copyright (c) 2000, 2001 Fabrice Bellard. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -#include "avformat.h" - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define AUDIO_BLOCK_SIZE 4096 - -typedef struct { - int fd; - int sample_rate; - int channels; - int frame_size; /* in bytes ! */ - int codec_id; - int flip_left : 1; - uint8_t buffer[AUDIO_BLOCK_SIZE]; - int buffer_ptr; -} AudioData; - -static int audio_open(AudioData *s, int is_output, const char *audio_device) -{ - int audio_fd; - int tmp, err; - char *flip = getenv("AUDIO_FLIP_LEFT"); - - /* open linux audio device */ - if (!audio_device) - audio_device = "/dev/dsp"; - - if (is_output) - audio_fd = open(audio_device, O_WRONLY); - else - audio_fd = open(audio_device, O_RDONLY); - if (audio_fd < 0) { - perror(audio_device); - return -EIO; - } - - if (flip && *flip == '1') { - s->flip_left = 1; - } - - /* non blocking mode */ - if (!is_output) - fcntl(audio_fd, F_SETFL, O_NONBLOCK); - - s->frame_size = AUDIO_BLOCK_SIZE; -#if 0 - tmp = (NB_FRAGMENTS << 16) | FRAGMENT_BITS; - err = ioctl(audio_fd, SNDCTL_DSP_SETFRAGMENT, &tmp); - if (err < 0) { - perror("SNDCTL_DSP_SETFRAGMENT"); - } -#endif - - /* select format : favour native format */ - err = ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &tmp); - -#ifdef WORDS_BIGENDIAN - if (tmp & AFMT_S16_BE) { - tmp = AFMT_S16_BE; - } else if (tmp & AFMT_S16_LE) { - tmp = AFMT_S16_LE; - } else { - tmp = 0; - } -#else - if (tmp & AFMT_S16_LE) { - tmp = AFMT_S16_LE; - } else if (tmp & AFMT_S16_BE) { - tmp = AFMT_S16_BE; - } else { - tmp = 0; - } -#endif - - switch(tmp) { - case AFMT_S16_LE: - s->codec_id = CODEC_ID_PCM_S16LE; - break; - case AFMT_S16_BE: - s->codec_id = CODEC_ID_PCM_S16BE; - break; - default: - fprintf(stderr, "Soundcard does not support 16 bit sample format\n"); - close(audio_fd); - return -EIO; - } - err=ioctl(audio_fd, SNDCTL_DSP_SETFMT, &tmp); - if (err < 0) { - perror("SNDCTL_DSP_SETFMT"); - goto fail; - } - - tmp = (s->channels == 2); - err = ioctl(audio_fd, SNDCTL_DSP_STEREO, &tmp); - if (err < 0) { - perror("SNDCTL_DSP_STEREO"); - goto fail; - } - if (tmp) - s->channels = 2; - - tmp = s->sample_rate; - err = ioctl(audio_fd, SNDCTL_DSP_SPEED, &tmp); - if (err < 0) { - perror("SNDCTL_DSP_SPEED"); - goto fail; - } - s->sample_rate = tmp; /* store real sample rate */ - s->fd = audio_fd; - - return 0; - fail: - close(audio_fd); - return -EIO; -} - -static int audio_close(AudioData *s) -{ - close(s->fd); - return 0; -} - -/* sound output support */ -static int audio_write_header(AVFormatContext *s1) -{ - AudioData *s = s1->priv_data; - AVStream *st; - int ret; - - st = s1->streams[0]; - s->sample_rate = st->codec.sample_rate; - s->channels = st->codec.channels; - ret = audio_open(s, 1, NULL); - if (ret < 0) { - return -EIO; - } else { - return 0; - } -} - -static int audio_write_packet(AVFormatContext *s1, int stream_index, - const uint8_t *buf, int size, int64_t pts) -{ - AudioData *s = s1->priv_data; - int len, ret; - - while (size > 0) { - len = AUDIO_BLOCK_SIZE - s->buffer_ptr; - if (len > size) - len = size; - memcpy(s->buffer + s->buffer_ptr, buf, len); - s->buffer_ptr += len; - if (s->buffer_ptr >= AUDIO_BLOCK_SIZE) { - for(;;) { - ret = write(s->fd, s->buffer, AUDIO_BLOCK_SIZE); - if (ret > 0) - break; - if (ret < 0 && (errno != EAGAIN && errno != EINTR)) - return -EIO; - } - s->buffer_ptr = 0; - } - buf += len; - size -= len; - } - return 0; -} - -static int audio_write_trailer(AVFormatContext *s1) -{ - AudioData *s = s1->priv_data; - - audio_close(s); - return 0; -} - -/* grab support */ - -static int audio_read_header(AVFormatContext *s1, AVFormatParameters *ap) -{ - AudioData *s = s1->priv_data; - AVStream *st; - int ret; - - if (!ap || ap->sample_rate <= 0 || ap->channels <= 0) - return -1; - - st = av_new_stream(s1, 0); - if (!st) { - return -ENOMEM; - } - s->sample_rate = ap->sample_rate; - s->channels = ap->channels; - - ret = audio_open(s, 0, ap->device); - if (ret < 0) { - av_free(st); - return -EIO; - } - - /* take real parameters */ - st->codec.codec_type = CODEC_TYPE_AUDIO; - st->codec.codec_id = s->codec_id; - st->codec.sample_rate = s->sample_rate; - st->codec.channels = s->channels; - - av_set_pts_info(s1, 48, 1, 1000000); /* 48 bits pts in us */ - return 0; -} - -static int audio_read_packet(AVFormatContext *s1, AVPacket *pkt) -{ - AudioData *s = s1->priv_data; - int ret, bdelay; - int64_t cur_time; - struct audio_buf_info abufi; - - if (av_new_packet(pkt, s->frame_size) < 0) - return -EIO; - for(;;) { - struct timeval tv; - fd_set fds; - - tv.tv_sec = 0; - tv.tv_usec = 30 * 1000; /* 30 msecs -- a bit shorter than 1 frame at 30fps */ - - FD_ZERO(&fds); - FD_SET(s->fd, &fds); - - /* This will block until data is available or we get a timeout */ - (void) select(s->fd + 1, &fds, 0, 0, &tv); - - ret = read(s->fd, pkt->data, pkt->size); - if (ret > 0) - break; - if (ret == -1 && (errno == EAGAIN || errno == EINTR)) { - av_free_packet(pkt); - pkt->size = 0; - return 0; - } - if (!(ret == 0 || (ret == -1 && (errno == EAGAIN || errno == EINTR)))) { - av_free_packet(pkt); - return -EIO; - } - } - pkt->size = ret; - - /* compute pts of the start of the packet */ - cur_time = av_gettime(); - bdelay = ret; - if (ioctl(s->fd, SNDCTL_DSP_GETISPACE, &abufi) == 0) { - bdelay += abufi.bytes; - } - /* substract time represented by the number of bytes in the audio fifo */ - cur_time -= (bdelay * 1000000LL) / (s->sample_rate * s->channels); - - /* convert to wanted units */ - pkt->pts = cur_time & ((1LL << 48) - 1); - - if (s->flip_left && s->channels == 2) { - int i; - short *p = (short *) pkt->data; - - for (i = 0; i < ret; i += 4) { - *p = ~*p; - p += 2; - } - } - return 0; -} - -static int audio_read_close(AVFormatContext *s1) -{ - AudioData *s = s1->priv_data; - - audio_close(s); - return 0; -} - -static AVInputFormat audio_in_format = { - "audio_device", - "audio grab and output", - sizeof(AudioData), - NULL, - audio_read_header, - audio_read_packet, - audio_read_close, - .flags = AVFMT_NOFILE, -}; - -static AVOutputFormat audio_out_format = { - "audio_device", - "audio grab and output", - "", - "", - sizeof(AudioData), - /* XXX: we make the assumption that the soundcard accepts this format */ - /* XXX: find better solution with "preinit" method, needed also in - other formats */ -#ifdef WORDS_BIGENDIAN - CODEC_ID_PCM_S16BE, -#else - CODEC_ID_PCM_S16LE, -#endif - CODEC_ID_NONE, - audio_write_header, - audio_write_packet, - audio_write_trailer, - .flags = AVFMT_NOFILE, -}; - -int audio_init(void) -{ - av_register_input_format(&audio_in_format); - av_register_output_format(&audio_out_format); - return 0; -}