| /* |
| * Copyright (c) 2013 Lukasz Marek <lukasz.m.luki@gmail.com> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <pulse/simple.h> |
| #include <pulse/error.h> |
| #include "libavformat/avformat.h" |
| #include "libavformat/internal.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/time.h" |
| #include "libavutil/log.h" |
| #include "pulse_audio_common.h" |
| |
| typedef struct PulseData { |
| AVClass *class; |
| const char *server; |
| const char *name; |
| const char *stream_name; |
| const char *device; |
| pa_simple *pa; |
| int64_t timestamp; |
| } PulseData; |
| |
| static av_cold int pulse_write_header(AVFormatContext *h) |
| { |
| PulseData *s = h->priv_data; |
| AVStream *st = NULL; |
| int ret; |
| pa_sample_spec ss; |
| pa_buffer_attr attr = { -1, -1, -1, -1, -1 }; |
| const char *stream_name = s->stream_name; |
| |
| if (h->nb_streams != 1 || h->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO) { |
| av_log(s, AV_LOG_ERROR, "Only a single audio stream is supported.\n"); |
| return AVERROR(EINVAL); |
| } |
| st = h->streams[0]; |
| |
| if (!stream_name) { |
| if (h->filename[0]) |
| stream_name = h->filename; |
| else |
| stream_name = "Playback"; |
| } |
| |
| ss.format = codec_id_to_pulse_format(st->codec->codec_id); |
| ss.rate = st->codec->sample_rate; |
| ss.channels = st->codec->channels; |
| |
| s->pa = pa_simple_new(s->server, // Server |
| s->name, // Application name |
| PA_STREAM_PLAYBACK, |
| s->device, // Device |
| stream_name, // Description of a stream |
| &ss, // Sample format |
| NULL, // Use default channel map |
| &attr, // Buffering attributes |
| &ret); // Result |
| |
| if (!s->pa) { |
| av_log(s, AV_LOG_ERROR, "pa_simple_new failed: %s\n", pa_strerror(ret)); |
| return AVERROR(EIO); |
| } |
| |
| avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ |
| |
| return 0; |
| } |
| |
| static av_cold int pulse_write_trailer(AVFormatContext *h) |
| { |
| PulseData *s = h->priv_data; |
| pa_simple_flush(s->pa, NULL); |
| pa_simple_free(s->pa); |
| s->pa = NULL; |
| return 0; |
| } |
| |
| static int pulse_write_packet(AVFormatContext *h, AVPacket *pkt) |
| { |
| PulseData *s = h->priv_data; |
| int error; |
| |
| if (!pkt) { |
| if (pa_simple_flush(s->pa, &error) < 0) { |
| av_log(s, AV_LOG_ERROR, "pa_simple_flush failed: %s\n", pa_strerror(error)); |
| return AVERROR(EIO); |
| } |
| return 0; |
| } |
| |
| if (pkt->dts != AV_NOPTS_VALUE) |
| s->timestamp = pkt->dts; |
| |
| if (pkt->duration) { |
| s->timestamp += pkt->duration; |
| } else { |
| AVStream *st = h->streams[0]; |
| AVCodecContext *codec_ctx = st->codec; |
| AVRational r = { 1, codec_ctx->sample_rate }; |
| int64_t samples = pkt->size / (av_get_bytes_per_sample(codec_ctx->sample_fmt) * codec_ctx->channels); |
| s->timestamp += av_rescale_q(samples, r, st->time_base); |
| } |
| |
| if (pa_simple_write(s->pa, pkt->data, pkt->size, &error) < 0) { |
| av_log(s, AV_LOG_ERROR, "pa_simple_write failed: %s\n", pa_strerror(error)); |
| return AVERROR(EIO); |
| } |
| |
| return 0; |
| } |
| |
| static void pulse_get_output_timestamp(AVFormatContext *h, int stream, int64_t *dts, int64_t *wall) |
| { |
| PulseData *s = h->priv_data; |
| pa_usec_t latency = pa_simple_get_latency(s->pa, NULL); |
| *wall = av_gettime(); |
| *dts = s->timestamp - latency; |
| } |
| |
| #define OFFSET(a) offsetof(PulseData, a) |
| #define E AV_OPT_FLAG_ENCODING_PARAM |
| |
| static const AVOption options[] = { |
| { "server", "set PulseAudio server", OFFSET(server), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, |
| { "name", "set application name", OFFSET(name), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, E }, |
| { "stream_name", "set stream description", OFFSET(stream_name), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, |
| { "device", "set device name", OFFSET(device), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, |
| { NULL } |
| }; |
| |
| static const AVClass pulse_muxer_class = { |
| .class_name = "Pulse muxer", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| AVOutputFormat ff_pulse_muxer = { |
| .name = "pulse", |
| .long_name = NULL_IF_CONFIG_SMALL("Pulse audio output"), |
| .priv_data_size = sizeof(PulseData), |
| .audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE), |
| .video_codec = AV_CODEC_ID_NONE, |
| .write_header = pulse_write_header, |
| .write_packet = pulse_write_packet, |
| .write_trailer = pulse_write_trailer, |
| .get_output_timestamp = pulse_get_output_timestamp, |
| .flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH, |
| .priv_class = &pulse_muxer_class, |
| }; |