40 #include <alsa/asoundlib.h>
70 "sample rate %d not available, nearest is %d\n",
90 size /=
s->frame_size;
95 if (
s->reorder_func) {
96 if (
size >
s->reorder_buf_size)
99 s->reorder_func(buf,
s->reorder_buf,
size);
100 buf =
s->reorder_buf;
102 while ((res = snd_pcm_writei(
s->h, buf,
size)) < 0) {
103 if (res == -EAGAIN) {
131 pkt.
size = (*frame)->nb_samples *
s->frame_size;
132 pkt.
dts = (*frame)->pkt_dts;
139 int64_t *dts, int64_t *wall)
142 snd_pcm_sframes_t delay = 0;
144 snd_pcm_delay(
s->h, &delay);
145 *dts =
s->timestamp - delay;
int ff_alsa_xrun_recover(AVFormatContext *s1, int err)
Try to recover from ALSA buffer underrun.
int ff_alsa_get_device_list(AVDeviceInfoList *device_list, snd_pcm_stream_t stream_type)
int ff_alsa_extend_reorder_buf(AlsaData *s, int min_size)
av_cold int ff_alsa_open(AVFormatContext *ctx, snd_pcm_stream_t mode, unsigned int *sample_rate, int channels, enum AVCodecID *codec_id)
Open an ALSA PCM.
av_cold int ff_alsa_close(AVFormatContext *s1)
Close the ALSA PCM.
ALSA input and output: definitions and structures.
static av_cold int audio_write_header(AVFormatContext *s1)
static void audio_get_output_timestamp(AVFormatContext *s1, int stream, int64_t *dts, int64_t *wall)
AVOutputFormat ff_alsa_muxer
static const AVClass alsa_muxer_class
static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
static int audio_write_frame(AVFormatContext *s1, int stream_index, AVFrame **frame, unsigned flags)
static int audio_get_device_list(AVFormatContext *h, AVDeviceInfoList *device_list)
Main libavdevice API header.
#define flags(name, subs,...)
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
static void write_header(FFV1Context *f)
AVCodecID
Identify the syntax and semantics of the bitstream.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
const char * av_default_item_name(void *ptr)
Return the context name.
int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
Check if the sample format is planar.
#define AV_NOPTS_VALUE
Undefined timestamp value.
#define LIBAVUTIL_VERSION_INT
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
@ AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT
Describe the class of an AVClass context structure.
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int sample_rate
Audio only.
This structure describes decoded (raw) audio or video data.
This structure stores compressed data.
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
int64_t av_gettime(void)
Get the current time in microseconds.
static int write_trailer(AVFormatContext *s1)