yading@10: /* yading@10: * Pulseaudio input yading@10: * Copyright (c) 2011 Luca Barbato yading@10: * yading@10: * This file is part of Libav. yading@10: * yading@10: * Libav is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * Libav is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with Libav; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * PulseAudio input using the simple API. yading@10: * @author Luca Barbato yading@10: */ yading@10: yading@10: #include yading@10: #include yading@10: #include yading@10: yading@10: #include "libavformat/avformat.h" yading@10: #include "libavformat/internal.h" yading@10: #include "libavutil/opt.h" yading@10: yading@10: #define DEFAULT_CODEC_ID AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE) yading@10: yading@10: typedef struct PulseData { yading@10: AVClass *class; yading@10: char *server; yading@10: char *name; yading@10: char *stream_name; yading@10: int sample_rate; yading@10: int channels; yading@10: int frame_size; yading@10: int fragment_size; yading@10: pa_simple *s; yading@10: int64_t pts; yading@10: int64_t frame_duration; yading@10: } PulseData; yading@10: yading@10: static pa_sample_format_t codec_id_to_pulse_format(int codec_id) { yading@10: switch (codec_id) { yading@10: case AV_CODEC_ID_PCM_U8: return PA_SAMPLE_U8; yading@10: case AV_CODEC_ID_PCM_ALAW: return PA_SAMPLE_ALAW; yading@10: case AV_CODEC_ID_PCM_MULAW: return PA_SAMPLE_ULAW; yading@10: case AV_CODEC_ID_PCM_S16LE: return PA_SAMPLE_S16LE; yading@10: case AV_CODEC_ID_PCM_S16BE: return PA_SAMPLE_S16BE; yading@10: case AV_CODEC_ID_PCM_F32LE: return PA_SAMPLE_FLOAT32LE; yading@10: case AV_CODEC_ID_PCM_F32BE: return PA_SAMPLE_FLOAT32BE; yading@10: case AV_CODEC_ID_PCM_S32LE: return PA_SAMPLE_S32LE; yading@10: case AV_CODEC_ID_PCM_S32BE: return PA_SAMPLE_S32BE; yading@10: case AV_CODEC_ID_PCM_S24LE: return PA_SAMPLE_S24LE; yading@10: case AV_CODEC_ID_PCM_S24BE: return PA_SAMPLE_S24BE; yading@10: default: return PA_SAMPLE_INVALID; yading@10: } yading@10: } yading@10: yading@10: static av_cold int pulse_read_header(AVFormatContext *s) yading@10: { yading@10: PulseData *pd = s->priv_data; yading@10: AVStream *st; yading@10: char *device = NULL; yading@10: int ret; yading@10: enum AVCodecID codec_id = yading@10: s->audio_codec_id == AV_CODEC_ID_NONE ? DEFAULT_CODEC_ID : s->audio_codec_id; yading@10: const pa_sample_spec ss = { codec_id_to_pulse_format(codec_id), yading@10: pd->sample_rate, yading@10: pd->channels }; yading@10: yading@10: pa_buffer_attr attr = { -1 }; yading@10: yading@10: st = avformat_new_stream(s, NULL); yading@10: yading@10: if (!st) { yading@10: av_log(s, AV_LOG_ERROR, "Cannot add stream\n"); yading@10: return AVERROR(ENOMEM); yading@10: } yading@10: yading@10: attr.fragsize = pd->fragment_size; yading@10: yading@10: if (strcmp(s->filename, "default")) yading@10: device = s->filename; yading@10: yading@10: pd->s = pa_simple_new(pd->server, pd->name, yading@10: PA_STREAM_RECORD, yading@10: device, pd->stream_name, &ss, yading@10: NULL, &attr, &ret); yading@10: yading@10: if (!pd->s) { yading@10: av_log(s, AV_LOG_ERROR, "pa_simple_new failed: %s\n", yading@10: pa_strerror(ret)); yading@10: return AVERROR(EIO); yading@10: } yading@10: /* take real parameters */ yading@10: st->codec->codec_type = AVMEDIA_TYPE_AUDIO; yading@10: st->codec->codec_id = codec_id; yading@10: st->codec->sample_rate = pd->sample_rate; yading@10: st->codec->channels = pd->channels; yading@10: avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ yading@10: yading@10: pd->pts = AV_NOPTS_VALUE; yading@10: pd->frame_duration = (pd->frame_size * 1000000LL * 8) / yading@10: (pd->sample_rate * pd->channels * av_get_bits_per_sample(codec_id)); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int pulse_read_packet(AVFormatContext *s, AVPacket *pkt) yading@10: { yading@10: PulseData *pd = s->priv_data; yading@10: int res; yading@10: pa_usec_t latency; yading@10: yading@10: if (av_new_packet(pkt, pd->frame_size) < 0) { yading@10: return AVERROR(ENOMEM); yading@10: } yading@10: yading@10: if ((pa_simple_read(pd->s, pkt->data, pkt->size, &res)) < 0) { yading@10: av_log(s, AV_LOG_ERROR, "pa_simple_read failed: %s\n", yading@10: pa_strerror(res)); yading@10: av_free_packet(pkt); yading@10: return AVERROR(EIO); yading@10: } yading@10: yading@10: if ((latency = pa_simple_get_latency(pd->s, &res)) == (pa_usec_t) -1) { yading@10: av_log(s, AV_LOG_ERROR, "pa_simple_get_latency() failed: %s\n", yading@10: pa_strerror(res)); yading@10: return AVERROR(EIO); yading@10: } yading@10: yading@10: if (pd->pts == AV_NOPTS_VALUE) { yading@10: pd->pts = -latency; yading@10: } yading@10: yading@10: pkt->pts = pd->pts; yading@10: yading@10: pd->pts += pd->frame_duration; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static av_cold int pulse_close(AVFormatContext *s) yading@10: { yading@10: PulseData *pd = s->priv_data; yading@10: pa_simple_free(pd->s); yading@10: return 0; yading@10: } yading@10: yading@10: #define OFFSET(a) offsetof(PulseData, a) yading@10: #define D AV_OPT_FLAG_DECODING_PARAM yading@10: yading@10: static const AVOption options[] = { yading@10: { "server", "pulse server name", OFFSET(server), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, D }, yading@10: { "name", "application name", OFFSET(name), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, D }, yading@10: { "stream_name", "stream description", OFFSET(stream_name), AV_OPT_TYPE_STRING, {.str = "record"}, 0, 0, D }, yading@10: { "sample_rate", "sample rate in Hz", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 48000}, 1, INT_MAX, D }, yading@10: { "channels", "number of audio channels", OFFSET(channels), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, D }, yading@10: { "frame_size", "number of bytes per frame", OFFSET(frame_size), AV_OPT_TYPE_INT, {.i64 = 1024}, 1, INT_MAX, D }, yading@10: { "fragment_size", "buffering size, affects latency and cpu usage", OFFSET(fragment_size), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D }, yading@10: { NULL }, yading@10: }; yading@10: yading@10: static const AVClass pulse_demuxer_class = { yading@10: .class_name = "Pulse demuxer", yading@10: .item_name = av_default_item_name, yading@10: .option = options, yading@10: .version = LIBAVUTIL_VERSION_INT, yading@10: }; yading@10: yading@10: AVInputFormat ff_pulse_demuxer = { yading@10: .name = "pulse", yading@10: .long_name = NULL_IF_CONFIG_SMALL("Pulse audio input"), yading@10: .priv_data_size = sizeof(PulseData), yading@10: .read_header = pulse_read_header, yading@10: .read_packet = pulse_read_packet, yading@10: .read_close = pulse_close, yading@10: .flags = AVFMT_NOFILE, yading@10: .priv_class = &pulse_demuxer_class, yading@10: };