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avfoundation.m File Reference

AVFoundation input device. More...

#import <AVFoundation/AVFoundation.h>
#include <pthread.h>
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"
#include "libavutil/avstring.h"
#include "libavformat/internal.h"
#include "libavutil/internal.h"
#include "libavutil/time.h"
#include "avdevice.h"

Go to the source code of this file.

Data Structures

struct  AVFPixelFormatSpec
 
struct  AVFContext
 
class  AVFFrameReceiver
 FrameReciever class - delegate for AVCaptureSession. More...
 
class  AVFAudioReceiver
 AudioReciever class - delegate for AVCaptureSession. More...
 

Macros

#define INTERLEAVE_OUTPUT(bps)
 

Functions

static void lock_frames (AVFContext *ctx)
 
static void unlock_frames (AVFContext *ctx)
 
static void destroy_context (AVFContext *ctx)
 
static void parse_device_name (AVFormatContext *s)
 
static int add_video_device (AVFormatContext *s, AVCaptureDevice *video_device)
 
static int add_audio_device (AVFormatContext *s, AVCaptureDevice *audio_device)
 
static int get_video_config (AVFormatContext *s)
 
static int get_audio_config (AVFormatContext *s)
 
static int avf_read_header (AVFormatContext *s)
 
static int avf_read_packet (AVFormatContext *s, AVPacket *pkt)
 
static int avf_close (AVFormatContext *s)
 

Variables

static const int avf_time_base = 1000000
 
static const AVRational avf_time_base_q
 
static struct AVFPixelFormatSpec avf_pixel_formats []
 
static const AVOption options []
 
static const AVClass avf_class
 
AVInputFormat ff_avfoundation_demuxer
 

Detailed Description

AVFoundation input device.

Author
Thilo Borgmann thilo.nosp@m..bor.nosp@m.gmann.nosp@m.@mai.nosp@m.l.de

Definition in file avfoundation.m.

Macro Definition Documentation

#define INTERLEAVE_OUTPUT (   bps)
Value:
{ \
int##bps##_t **src; \
int##bps##_t *dest; \
src = av_malloc(ctx->audio_channels * sizeof(int##bps##_t*)); \
if (!src) return AVERROR(EIO); \
for (c = 0; c < ctx->audio_channels; c++) { \
src[c] = ((int##bps##_t*)ctx->audio_buffer) + c * num_samples; \
} \
dest = (int##bps##_t*)pkt->data; \
shift = bps - ctx->audio_bits_per_sample; \
for (sample = 0; sample < num_samples; sample++) \
for (c = 0; c < ctx->audio_channels; c++) \
*dest++ = src[c][sample] << shift; \
av_freep(&src); \
}

Function Documentation

static void lock_frames ( AVFContext *  ctx)
static

Definition at line 124 of file avfoundation.m.

Referenced by avf_read_packet(), AVFFrameReceiver::captureOutput:didOutputSampleBuffer:fromConnection:, AVFAudioReceiver::captureOutput:didOutputSampleBuffer:fromConnection:, get_audio_config(), and get_video_config().

static void unlock_frames ( AVFContext *  ctx)
static

Definition at line 129 of file avfoundation.m.

Referenced by avf_read_packet(), AVFFrameReceiver::captureOutput:didOutputSampleBuffer:fromConnection:, AVFAudioReceiver::captureOutput:didOutputSampleBuffer:fromConnection:, get_audio_config(), and get_video_config().

static void destroy_context ( AVFContext *  ctx)
static

Definition at line 226 of file avfoundation.m.

Referenced by avf_close(), and avf_read_header().

static void parse_device_name ( AVFormatContext *  s)
static

Definition at line 252 of file avfoundation.m.

Referenced by avf_read_header().

static int add_video_device ( AVFormatContext *  s,
AVCaptureDevice *  video_device 
)
static

Definition at line 266 of file avfoundation.m.

Referenced by avf_read_header().

static int add_audio_device ( AVFormatContext *  s,
AVCaptureDevice *  audio_device 
)
static

Definition at line 378 of file avfoundation.m.

Referenced by avf_read_header().

static int get_video_config ( AVFormatContext *  s)
static

Definition at line 421 of file avfoundation.m.

Referenced by avf_read_header().

static int get_audio_config ( AVFormatContext *  s)
static

Definition at line 459 of file avfoundation.m.

Referenced by avf_read_header().

static int avf_read_header ( AVFormatContext *  s)
static

Definition at line 528 of file avfoundation.m.

static int avf_read_packet ( AVFormatContext *  s,
AVPacket *  pkt 
)
static

Definition at line 717 of file avfoundation.m.

static int avf_close ( AVFormatContext *  s)
static

Definition at line 821 of file avfoundation.m.

Variable Documentation

const int avf_time_base = 1000000
static

Definition at line 39 of file avfoundation.m.

Referenced by get_audio_config(), and get_video_config().

const AVRational avf_time_base_q
static
Initial value:
= {
.num = 1,
.den = avf_time_base
}

Definition at line 41 of file avfoundation.m.

struct AVFPixelFormatSpec avf_pixel_formats[]
static
Initial value:
= {
{ AV_PIX_FMT_MONOBLACK, kCVPixelFormatType_1Monochrome },
{ AV_PIX_FMT_RGB555BE, kCVPixelFormatType_16BE555 },
{ AV_PIX_FMT_RGB555LE, kCVPixelFormatType_16LE555 },
{ AV_PIX_FMT_RGB565BE, kCVPixelFormatType_16BE565 },
{ AV_PIX_FMT_RGB565LE, kCVPixelFormatType_16LE565 },
{ AV_PIX_FMT_RGB24, kCVPixelFormatType_24RGB },
{ AV_PIX_FMT_BGR24, kCVPixelFormatType_24BGR },
{ AV_PIX_FMT_0RGB, kCVPixelFormatType_32ARGB },
{ AV_PIX_FMT_BGR0, kCVPixelFormatType_32BGRA },
{ AV_PIX_FMT_0BGR, kCVPixelFormatType_32ABGR },
{ AV_PIX_FMT_RGB0, kCVPixelFormatType_32RGBA },
{ AV_PIX_FMT_BGR48BE, kCVPixelFormatType_48RGB },
{ AV_PIX_FMT_UYVY422, kCVPixelFormatType_422YpCbCr8 },
{ AV_PIX_FMT_YUVA444P, kCVPixelFormatType_4444YpCbCrA8R },
{ AV_PIX_FMT_YUVA444P16LE, kCVPixelFormatType_4444AYpCbCr16 },
{ AV_PIX_FMT_YUV444P, kCVPixelFormatType_444YpCbCr8 },
{ AV_PIX_FMT_YUV422P16, kCVPixelFormatType_422YpCbCr16 },
{ AV_PIX_FMT_YUV422P10, kCVPixelFormatType_422YpCbCr10 },
{ AV_PIX_FMT_YUV444P10, kCVPixelFormatType_444YpCbCr10 },
{ AV_PIX_FMT_YUV420P, kCVPixelFormatType_420YpCbCr8Planar },
{ AV_PIX_FMT_NV12, kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange },
{ AV_PIX_FMT_YUYV422, kCVPixelFormatType_422YpCbCr8_yuvs },
{ AV_PIX_FMT_NONE, 0 }
}

Definition at line 51 of file avfoundation.m.

const AVOption options[]
static
Initial value:
= {
{ "list_devices", "list available devices", 0x42, AV_OPT_TYPE_INT, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM, "list_devices" },
{ "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "list_devices" },
{ "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "list_devices" },
{ "video_device_index", "select video device by index for devices with same name (starts at 0)", 0x42, AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
{ "audio_device_index", "select audio device by index for devices with same name (starts at 0)", 0x42, AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
{ "pixel_format", "set pixel format", 0x42, AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_YUV420P}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM},
{ NULL },
}

Definition at line 828 of file avfoundation.m.

const AVClass avf_class
static
Initial value:
= {
.class_name = "AVFoundation input device",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
}

Definition at line 838 of file avfoundation.m.

AVInputFormat ff_avfoundation_demuxer
Initial value:
= {
.name = "avfoundation",
.long_name = NULL_IF_CONFIG_SMALL("AVFoundation input device"),
.priv_data_size = sizeof(AVFContext),
.read_header = avf_read_header,
.read_packet = avf_read_packet,
.read_close = avf_close,
.flags = AVFMT_NOFILE,
.priv_class = &avf_class,
}

Definition at line 846 of file avfoundation.m.

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