#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"
-static const int avf_time_base = 100;
+static const int avf_time_base = 1000000;
static const AVRational avf_time_base_q = {
.num = 1,
{
AVClass* class;
- float frame_rate;
int frames_captured;
+ int audio_frames_captured;
int64_t first_pts;
+ int64_t first_audio_pts;
pthread_mutex_t frame_lock;
pthread_cond_t frame_wait_cond;
id avf_delegate;
+ id avf_audio_delegate;
int list_devices;
int video_device_index;
+ int video_stream_index;
+ int audio_device_index;
+ int audio_stream_index;
+
+ char *video_filename;
+ char *audio_filename;
+
+ int num_video_devices;
+
+ int audio_channels;
+ int audio_bits_per_sample;
+ int audio_float;
+ int audio_be;
+ int audio_signed_integer;
+ int audio_packed;
+ int audio_non_interleaved;
+
+ int32_t *audio_buffer;
+ int audio_buffer_size;
+
enum AVPixelFormat pixel_format;
AVCaptureSession *capture_session;
AVCaptureVideoDataOutput *video_output;
+ AVCaptureAudioDataOutput *audio_output;
CMSampleBufferRef current_frame;
+ CMSampleBufferRef current_audio_frame;
} AVFContext;
static void lock_frames(AVFContext* ctx)
@end
+/** AudioReciever class - delegate for AVCaptureSession
+ */
+@interface AVFAudioReceiver : NSObject
+{
+ AVFContext* _context;
+}
+
+- (id)initWithContext:(AVFContext*)context;
+
+- (void) captureOutput:(AVCaptureOutput *)captureOutput
+ didOutputSampleBuffer:(CMSampleBufferRef)audioFrame
+ fromConnection:(AVCaptureConnection *)connection;
+
+@end
+
+@implementation AVFAudioReceiver
+
+- (id)initWithContext:(AVFContext*)context
+{
+ if (self = [super init]) {
+ _context = context;
+ }
+ return self;
+}
+
+- (void) captureOutput:(AVCaptureOutput *)captureOutput
+ didOutputSampleBuffer:(CMSampleBufferRef)audioFrame
+ fromConnection:(AVCaptureConnection *)connection
+{
+ lock_frames(_context);
+
+ if (_context->current_audio_frame != nil) {
+ CFRelease(_context->current_audio_frame);
+ }
+
+ _context->current_audio_frame = (CMSampleBufferRef)CFRetain(audioFrame);
+
+ pthread_cond_signal(&_context->frame_wait_cond);
+
+ unlock_frames(_context);
+
+ ++_context->audio_frames_captured;
+}
+
+@end
+
static void destroy_context(AVFContext* ctx)
{
[ctx->capture_session stopRunning];
[ctx->capture_session release];
[ctx->video_output release];
+ [ctx->audio_output release];
[ctx->avf_delegate release];
+ [ctx->avf_audio_delegate release];
ctx->capture_session = NULL;
ctx->video_output = NULL;
+ ctx->audio_output = NULL;
ctx->avf_delegate = NULL;
+ ctx->avf_audio_delegate = NULL;
+
+ av_freep(&ctx->audio_buffer);
pthread_mutex_destroy(&ctx->frame_lock);
pthread_cond_destroy(&ctx->frame_wait_cond);
}
}
-static int avf_read_header(AVFormatContext *s)
+static void parse_device_name(AVFormatContext *s)
{
- NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
- AVFContext *ctx = (AVFContext*)s->priv_data;
- ctx->first_pts = av_gettime();
-
- pthread_mutex_init(&ctx->frame_lock, NULL);
- pthread_cond_init(&ctx->frame_wait_cond, NULL);
-
- // List devices if requested
- if (ctx->list_devices) {
- av_log(ctx, AV_LOG_INFO, "AVFoundation video devices:\n");
- NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
- for (AVCaptureDevice *device in devices) {
- const char *name = [[device localizedName] UTF8String];
- int index = [devices indexOfObject:device];
- av_log(ctx, AV_LOG_INFO, "[%d] %s\n", index, name);
- }
- goto fail;
- }
-
- // Find capture device
- AVCaptureDevice *video_device = nil;
-
- // check for device index given in filename
- if (ctx->video_device_index == -1) {
- sscanf(s->filename, "%d", &ctx->video_device_index);
- }
-
- if (ctx->video_device_index >= 0) {
- NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
-
- if (ctx->video_device_index >= [devices count]) {
- av_log(ctx, AV_LOG_ERROR, "Invalid device index\n");
- goto fail;
- }
-
- video_device = [devices objectAtIndex:ctx->video_device_index];
- } else if (strncmp(s->filename, "", 1) &&
- strncmp(s->filename, "default", 7)) {
- NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
-
- for (AVCaptureDevice *device in devices) {
- if (!strncmp(s->filename, [[device localizedName] UTF8String], strlen(s->filename))) {
- video_device = device;
- break;
- }
- }
+ AVFContext *ctx = (AVFContext*)s->priv_data;
+ char *tmp = av_strdup(s->filename);
+ char *save;
- if (!video_device) {
- av_log(ctx, AV_LOG_ERROR, "Video device not found\n");
- goto fail;
- }
+ if (tmp[0] != ':') {
+ ctx->video_filename = av_strtok(tmp, ":", &save);
+ ctx->audio_filename = av_strtok(NULL, ":", &save);
} else {
- video_device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeMuxed];
+ ctx->audio_filename = av_strtok(tmp, ":", &save);
}
+}
- // Video capture device not found, looking for AVMediaTypeVideo
- if (!video_device) {
- video_device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
+static int add_video_device(AVFormatContext *s, AVCaptureDevice *video_device)
+{
+ AVFContext *ctx = (AVFContext*)s->priv_data;
+ NSError *error = nil;
+ AVCaptureInput* capture_input = nil;
- if (!video_device) {
- av_log(s, AV_LOG_ERROR, "No AV capture device found\n");
- goto fail;
- }
+ if (ctx->video_device_index < ctx->num_video_devices) {
+ capture_input = (AVCaptureInput*) [[[AVCaptureDeviceInput alloc] initWithDevice:video_device error:&error] autorelease];
+ } else {
+ capture_input = (AVCaptureInput*) video_device;
}
- NSString* dev_display_name = [video_device localizedName];
- av_log(s, AV_LOG_DEBUG, "'%s' opened\n", [dev_display_name UTF8String]);
-
- // Initialize capture session
- ctx->capture_session = [[AVCaptureSession alloc] init];
-
- NSError *error = nil;
- AVCaptureDeviceInput* capture_dev_input = [[[AVCaptureDeviceInput alloc] initWithDevice:video_device error:&error] autorelease];
-
- if (!capture_dev_input) {
+ if (!capture_input) {
av_log(s, AV_LOG_ERROR, "Failed to create AV capture input device: %s\n",
[[error localizedDescription] UTF8String]);
- goto fail;
- }
-
- if (!capture_dev_input) {
- av_log(s, AV_LOG_ERROR, "Failed to add AV capture input device to session: %s\n",
- [[error localizedDescription] UTF8String]);
- goto fail;
+ return 1;
}
- if ([ctx->capture_session canAddInput:capture_dev_input]) {
- [ctx->capture_session addInput:capture_dev_input];
+ if ([ctx->capture_session canAddInput:capture_input]) {
+ [ctx->capture_session addInput:capture_input];
} else {
av_log(s, AV_LOG_ERROR, "can't add video input to capture session\n");
- goto fail;
+ return 1;
}
// Attaching output
if (!ctx->video_output) {
av_log(s, AV_LOG_ERROR, "Failed to init AV video output\n");
- goto fail;
+ return 1;
}
// select pixel format
if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) {
av_log(s, AV_LOG_ERROR, "Selected pixel format (%s) is not supported by AVFoundation.\n",
av_get_pix_fmt_name(pxl_fmt_spec.ff_id));
- goto fail;
+ return 1;
}
// check if the pixel format is available for this device
// fail if there is no appropriate pixel format or print a warning about overriding the pixel format
if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) {
- goto fail;
+ return 1;
} else {
av_log(s, AV_LOG_WARNING, "Overriding selected pixel format to use %s instead.\n",
av_get_pix_fmt_name(pxl_fmt_spec.ff_id));
}
}
-
+ ctx->pixel_format = pxl_fmt_spec.ff_id;
NSNumber *pixel_format = [NSNumber numberWithUnsignedInt:pxl_fmt_spec.avf_id];
NSDictionary *capture_dict = [NSDictionary dictionaryWithObject:pixel_format
forKey:(id)kCVPixelBufferPixelFormatTypeKey];
[ctx->capture_session addOutput:ctx->video_output];
} else {
av_log(s, AV_LOG_ERROR, "can't add video output to capture session\n");
- goto fail;
+ return 1;
}
- [ctx->capture_session startRunning];
+ return 0;
+}
+
+static int add_audio_device(AVFormatContext *s, AVCaptureDevice *audio_device)
+{
+ AVFContext *ctx = (AVFContext*)s->priv_data;
+ NSError *error = nil;
+ AVCaptureDeviceInput* audio_dev_input = [[[AVCaptureDeviceInput alloc] initWithDevice:audio_device error:&error] autorelease];
+
+ if (!audio_dev_input) {
+ av_log(s, AV_LOG_ERROR, "Failed to create AV capture input device: %s\n",
+ [[error localizedDescription] UTF8String]);
+ return 1;
+ }
+
+ if ([ctx->capture_session canAddInput:audio_dev_input]) {
+ [ctx->capture_session addInput:audio_dev_input];
+ } else {
+ av_log(s, AV_LOG_ERROR, "can't add audio input to capture session\n");
+ return 1;
+ }
+
+ // Attaching output
+ ctx->audio_output = [[AVCaptureAudioDataOutput alloc] init];
+
+ if (!ctx->audio_output) {
+ av_log(s, AV_LOG_ERROR, "Failed to init AV audio output\n");
+ return 1;
+ }
+
+ ctx->avf_audio_delegate = [[AVFAudioReceiver alloc] initWithContext:ctx];
+
+ dispatch_queue_t queue = dispatch_queue_create("avf_audio_queue", NULL);
+ [ctx->audio_output setSampleBufferDelegate:ctx->avf_audio_delegate queue:queue];
+ dispatch_release(queue);
+
+ if ([ctx->capture_session canAddOutput:ctx->audio_output]) {
+ [ctx->capture_session addOutput:ctx->audio_output];
+ } else {
+ av_log(s, AV_LOG_ERROR, "adding audio output to capture session failed\n");
+ return 1;
+ }
+
+ return 0;
+}
+
+static int get_video_config(AVFormatContext *s)
+{
+ AVFContext *ctx = (AVFContext*)s->priv_data;
// Take stream info from the first frame.
while (ctx->frames_captured < 1) {
AVStream* stream = avformat_new_stream(s, NULL);
if (!stream) {
- goto fail;
+ return 1;
}
+ ctx->video_stream_index = stream->index;
+
avpriv_set_pts_info(stream, 64, 1, avf_time_base);
CVImageBufferRef image_buffer = CMSampleBufferGetImageBuffer(ctx->current_frame);
stream->codec->codec_type = AVMEDIA_TYPE_VIDEO;
stream->codec->width = (int)image_buffer_size.width;
stream->codec->height = (int)image_buffer_size.height;
- stream->codec->pix_fmt = pxl_fmt_spec.ff_id;
+ stream->codec->pix_fmt = ctx->pixel_format;
CFRelease(ctx->current_frame);
ctx->current_frame = nil;
unlock_frames(ctx);
+
+ return 0;
+}
+
+static int get_audio_config(AVFormatContext *s)
+{
+ AVFContext *ctx = (AVFContext*)s->priv_data;
+
+ // Take stream info from the first frame.
+ while (ctx->audio_frames_captured < 1) {
+ CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.1, YES);
+ }
+
+ lock_frames(ctx);
+
+ AVStream* stream = avformat_new_stream(s, NULL);
+
+ if (!stream) {
+ return 1;
+ }
+
+ ctx->audio_stream_index = stream->index;
+
+ avpriv_set_pts_info(stream, 64, 1, avf_time_base);
+
+ CMFormatDescriptionRef format_desc = CMSampleBufferGetFormatDescription(ctx->current_audio_frame);
+ const AudioStreamBasicDescription *basic_desc = CMAudioFormatDescriptionGetStreamBasicDescription(format_desc);
+
+ if (!basic_desc) {
+ av_log(s, AV_LOG_ERROR, "audio format not available\n");
+ return 1;
+ }
+
+ stream->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ stream->codec->sample_rate = basic_desc->mSampleRate;
+ stream->codec->channels = basic_desc->mChannelsPerFrame;
+ stream->codec->channel_layout = av_get_default_channel_layout(stream->codec->channels);
+
+ ctx->audio_channels = basic_desc->mChannelsPerFrame;
+ ctx->audio_bits_per_sample = basic_desc->mBitsPerChannel;
+ ctx->audio_float = basic_desc->mFormatFlags & kAudioFormatFlagIsFloat;
+ ctx->audio_be = basic_desc->mFormatFlags & kAudioFormatFlagIsBigEndian;
+ ctx->audio_signed_integer = basic_desc->mFormatFlags & kAudioFormatFlagIsSignedInteger;
+ ctx->audio_packed = basic_desc->mFormatFlags & kAudioFormatFlagIsPacked;
+ ctx->audio_non_interleaved = basic_desc->mFormatFlags & kAudioFormatFlagIsNonInterleaved;
+
+ if (basic_desc->mFormatID == kAudioFormatLinearPCM &&
+ ctx->audio_float &&
+ ctx->audio_packed) {
+ stream->codec->codec_id = ctx->audio_be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
+ } else {
+ av_log(s, AV_LOG_ERROR, "audio format is not supported\n");
+ return 1;
+ }
+
+ if (ctx->audio_non_interleaved) {
+ CMBlockBufferRef block_buffer = CMSampleBufferGetDataBuffer(ctx->current_audio_frame);
+ ctx->audio_buffer_size = CMBlockBufferGetDataLength(block_buffer);
+ ctx->audio_buffer = av_malloc(ctx->audio_buffer_size);
+ if (!ctx->audio_buffer) {
+ av_log(s, AV_LOG_ERROR, "error allocating audio buffer\n");
+ return 1;
+ }
+ }
+
+ CFRelease(ctx->current_audio_frame);
+ ctx->current_audio_frame = nil;
+
+ unlock_frames(ctx);
+
+ return 0;
+}
+
+static int avf_read_header(AVFormatContext *s)
+{
+ NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+ AVFContext *ctx = (AVFContext*)s->priv_data;
+ ctx->first_pts = av_gettime();
+ ctx->first_audio_pts = av_gettime();
+ uint32_t num_screens = 0;
+
+ pthread_mutex_init(&ctx->frame_lock, NULL);
+ pthread_cond_init(&ctx->frame_wait_cond, NULL);
+
+#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
+ CGGetActiveDisplayList(0, NULL, &num_screens);
+#endif
+
+ // List devices if requested
+ if (ctx->list_devices) {
+ av_log(ctx, AV_LOG_INFO, "AVFoundation video devices:\n");
+ NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
+ int index = 0;
+ for (AVCaptureDevice *device in devices) {
+ const char *name = [[device localizedName] UTF8String];
+ index = [devices indexOfObject:device];
+ av_log(ctx, AV_LOG_INFO, "[%d] %s\n", index, name);
+ index++;
+ }
+#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
+ if (num_screens > 0) {
+ CGDirectDisplayID screens[num_screens];
+ CGGetActiveDisplayList(num_screens, screens, &num_screens);
+ for (int i = 0; i < num_screens; i++) {
+ av_log(ctx, AV_LOG_INFO, "[%d] Capture screen %d\n", index + i, i);
+ }
+ }
+#endif
+
+ av_log(ctx, AV_LOG_INFO, "AVFoundation audio devices:\n");
+ devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio];
+ for (AVCaptureDevice *device in devices) {
+ const char *name = [[device localizedName] UTF8String];
+ int index = [devices indexOfObject:device];
+ av_log(ctx, AV_LOG_INFO, "[%d] %s\n", index, name);
+ }
+ goto fail;
+ }
+
+ // Find capture device
+ AVCaptureDevice *video_device = nil;
+ AVCaptureDevice *audio_device = nil;
+
+ NSArray *video_devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
+ ctx->num_video_devices = [video_devices count];
+
+ // parse input filename for video and audio device
+ parse_device_name(s);
+
+ // check for device index given in filename
+ if (ctx->video_device_index == -1 && ctx->video_filename) {
+ sscanf(ctx->video_filename, "%d", &ctx->video_device_index);
+ }
+ if (ctx->audio_device_index == -1 && ctx->audio_filename) {
+ sscanf(ctx->audio_filename, "%d", &ctx->audio_device_index);
+ }
+
+ if (ctx->video_device_index >= 0) {
+ if (ctx->video_device_index < ctx->num_video_devices) {
+ video_device = [video_devices objectAtIndex:ctx->video_device_index];
+ } else if (ctx->video_device_index < ctx->num_video_devices + num_screens) {
+#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
+ CGDirectDisplayID screens[num_screens];
+ CGGetActiveDisplayList(num_screens, screens, &num_screens);
+ AVCaptureScreenInput* capture_screen_input = [[[AVCaptureScreenInput alloc] initWithDisplayID:screens[ctx->video_device_index - ctx->num_video_devices]] autorelease];
+ video_device = (AVCaptureDevice*) capture_screen_input;
+#endif
+ } else {
+ av_log(ctx, AV_LOG_ERROR, "Invalid device index\n");
+ goto fail;
+ }
+ } else if (ctx->video_filename &&
+ strncmp(ctx->video_filename, "none", 4)) {
+ if (!strncmp(ctx->video_filename, "default", 7)) {
+ video_device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
+ } else {
+ // looking for video inputs
+ for (AVCaptureDevice *device in video_devices) {
+ if (!strncmp(ctx->video_filename, [[device localizedName] UTF8String], strlen(ctx->video_filename))) {
+ video_device = device;
+ break;
+ }
+ }
+
+#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
+ // looking for screen inputs
+ if (!video_device) {
+ int idx;
+ if(sscanf(ctx->video_filename, "Capture screen %d", &idx) && idx < num_screens) {
+ CGDirectDisplayID screens[num_screens];
+ CGGetActiveDisplayList(num_screens, screens, &num_screens);
+ AVCaptureScreenInput* capture_screen_input = [[[AVCaptureScreenInput alloc] initWithDisplayID:screens[idx]] autorelease];
+ video_device = (AVCaptureDevice*) capture_screen_input;
+ ctx->video_device_index = ctx->num_video_devices + idx;
+ }
+ }
+#endif
+ }
+
+ if (!video_device) {
+ av_log(ctx, AV_LOG_ERROR, "Video device not found\n");
+ goto fail;
+ }
+ }
+
+ // get audio device
+ if (ctx->audio_device_index >= 0) {
+ NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio];
+
+ if (ctx->audio_device_index >= [devices count]) {
+ av_log(ctx, AV_LOG_ERROR, "Invalid audio device index\n");
+ goto fail;
+ }
+
+ audio_device = [devices objectAtIndex:ctx->audio_device_index];
+ } else if (ctx->audio_filename &&
+ strncmp(ctx->audio_filename, "none", 4)) {
+ if (!strncmp(ctx->audio_filename, "default", 7)) {
+ audio_device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
+ } else {
+ NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio];
+
+ for (AVCaptureDevice *device in devices) {
+ if (!strncmp(ctx->audio_filename, [[device localizedName] UTF8String], strlen(ctx->audio_filename))) {
+ audio_device = device;
+ break;
+ }
+ }
+ }
+
+ if (!audio_device) {
+ av_log(ctx, AV_LOG_ERROR, "Audio device not found\n");
+ goto fail;
+ }
+ }
+
+ // Video nor Audio capture device not found, looking for AVMediaTypeVideo/Audio
+ if (!video_device && !audio_device) {
+ av_log(s, AV_LOG_ERROR, "No AV capture device found\n");
+ goto fail;
+ }
+
+ if (video_device) {
+ if (ctx->video_device_index < ctx->num_video_devices) {
+ av_log(s, AV_LOG_DEBUG, "'%s' opened\n", [[video_device localizedName] UTF8String]);
+ } else {
+ av_log(s, AV_LOG_DEBUG, "'%s' opened\n", [[video_device description] UTF8String]);
+ }
+ }
+ if (audio_device) {
+ av_log(s, AV_LOG_DEBUG, "audio device '%s' opened\n", [[audio_device localizedName] UTF8String]);
+ }
+
+ // Initialize capture session
+ ctx->capture_session = [[AVCaptureSession alloc] init];
+
+ if (video_device && add_video_device(s, video_device)) {
+ goto fail;
+ }
+ if (audio_device && add_audio_device(s, audio_device)) {
+ }
+
+ [ctx->capture_session startRunning];
+
+ if (video_device && get_video_config(s)) {
+ goto fail;
+ }
+
+ // set audio stream
+ if (audio_device && get_audio_config(s)) {
+ goto fail;
+ }
+
[pool release];
return 0;
pkt->pts = pkt->dts = av_rescale_q(av_gettime() - ctx->first_pts,
AV_TIME_BASE_Q,
avf_time_base_q);
- pkt->stream_index = 0;
+ pkt->stream_index = ctx->video_stream_index;
pkt->flags |= AV_PKT_FLAG_KEY;
CVPixelBufferLockBaseAddress(image_buffer, 0);
CVPixelBufferUnlockBaseAddress(image_buffer, 0);
CFRelease(ctx->current_frame);
ctx->current_frame = nil;
+ } else if (ctx->current_audio_frame != nil) {
+ CMBlockBufferRef block_buffer = CMSampleBufferGetDataBuffer(ctx->current_audio_frame);
+ int block_buffer_size = CMBlockBufferGetDataLength(block_buffer);
+
+ if (!block_buffer || !block_buffer_size) {
+ return AVERROR(EIO);
+ }
+
+ if (ctx->audio_non_interleaved && block_buffer_size > ctx->audio_buffer_size) {
+ return AVERROR_BUFFER_TOO_SMALL;
+ }
+
+ if (av_new_packet(pkt, block_buffer_size) < 0) {
+ return AVERROR(EIO);
+ }
+
+ pkt->pts = pkt->dts = av_rescale_q(av_gettime() - ctx->first_audio_pts,
+ AV_TIME_BASE_Q,
+ avf_time_base_q);
+
+ pkt->stream_index = ctx->audio_stream_index;
+ pkt->flags |= AV_PKT_FLAG_KEY;
+
+ if (ctx->audio_non_interleaved) {
+ int sample, c, shift;
+
+ OSStatus ret = CMBlockBufferCopyDataBytes(block_buffer, 0, pkt->size, ctx->audio_buffer);
+ if (ret != kCMBlockBufferNoErr) {
+ return AVERROR(EIO);
+ }
+
+ int num_samples = pkt->size / (ctx->audio_channels * (ctx->audio_bits_per_sample >> 3));
+
+ // transform decoded frame into output format
+ #define INTERLEAVE_OUTPUT(bps) \
+ { \
+ 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); \
+ }
+
+ if (ctx->audio_bits_per_sample <= 16) {
+ INTERLEAVE_OUTPUT(16)
+ } else {
+ INTERLEAVE_OUTPUT(32)
+ }
+ } else {
+ OSStatus ret = CMBlockBufferCopyDataBytes(block_buffer, 0, pkt->size, pkt->data);
+ if (ret != kCMBlockBufferNoErr) {
+ return AVERROR(EIO);
+ }
+ }
+
+ CFRelease(ctx->current_audio_frame);
+ ctx->current_audio_frame = nil;
} else {
pkt->data = NULL;
pthread_cond_wait(&ctx->frame_wait_cond, &ctx->frame_lock);
}
static const AVOption options[] = {
- { "frame_rate", "set frame rate", offsetof(AVFContext, frame_rate), AV_OPT_TYPE_FLOAT, { .dbl = 30.0 }, 0.1, 30.0, AV_OPT_TYPE_VIDEO_RATE, NULL },
{ "list_devices", "list available devices", offsetof(AVFContext, list_devices), 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)", offsetof(AVFContext, video_device_index), 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)", offsetof(AVFContext, audio_device_index), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
{ "pixel_format", "set pixel format", offsetof(AVFContext, pixel_format), AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_YUV420P}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM},
{ NULL },
};
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