30 #include <sys/ioctl.h>
31 #include <sys/soundcard.h>
75 struct audio_buf_info abufi;
84 if (ret<0)
return AVERROR(errno);
92 if (ioctl(
s->fd, SNDCTL_DSP_GETISPACE, &abufi) == 0) {
93 bdelay += abufi.bytes;
96 cur_time -= (bdelay * 1000000LL) / (
s->sample_rate *
s->channels);
101 if (
s->flip_left &&
s->channels == 2) {
103 short *p = (
short *)
pkt->
data;
105 for (
i = 0;
i < ret;
i += 4) {
Libavcodec external API header.
Main libavdevice API header.
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
#define flags(name, subs,...)
static int read_header(FFV1Context *f)
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
#define AVERROR_EOF
End of file.
const char * av_default_item_name(void *ptr)
Return the context name.
#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.
static av_cold int read_close(AVFormatContext *ctx)
@ AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
int ff_oss_audio_open(AVFormatContext *s1, int is_output, const char *audio_device)
int ff_oss_audio_close(OSSAudioData *s)
AVInputFormat ff_oss_demuxer
static int audio_read_header(AVFormatContext *s1)
static const AVOption options[]
static int audio_read_packet(AVFormatContext *s1, AVPacket *pkt)
static int audio_read_close(AVFormatContext *s1)
static const AVClass oss_demuxer_class
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 AVMediaType codec_type
General type of the encoded data.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int sample_rate
Audio only.
This structure stores compressed data.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
AVCodecParameters * codecpar
Codec parameters associated with this stream.
int64_t av_gettime(void)
Get the current time in microseconds.