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lavd/avfoundation: Support user selected pixel formats and pixel format autoselection. 

Signed-off-by: Thilo Borgmann <thilo.borgmann@mail.de>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
sfan5 2014-06-11 20:26:33 +02:00 committed by Michael Niedermayer
parent 6286bb5c07
commit ffe6ecc418
2 changed files with 98 additions and 4 deletions
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7
doc/indevs.texi
View File

@ -64,6 +64,11 @@ A given device index will override any given device name.
If the desired device consists of numbers only, use -video_device_index to identify it.
The default device will be chosen if an empty string or the device name "default" is given.
The available devices can be enumerated by using -list_devices.
The pixel format can be set using -pixel_format.
Available formats:
monob, rgb555be, rgb555le, rgb565be, rgb565le, rgb24, bgr24, 0rgb, bgr0, 0bgr, rgb0,
bgr48be, uyvy422, yuva444p, yuva444p16le, yuv444p, yuv422p16, yuv422p10, yuv444p10,
yuv420p, nv12, yuyv422, gray
@example
ffmpeg -f avfoundation -i "0" out.mpg
@ -74,7 +79,7 @@ ffmpeg -f avfoundation -video_device_index 0 -i "" out.mpg
@end example
@example
ffmpeg -f avfoundation -i "default" out.mpg
ffmpeg -f avfoundation -pixel_format bgr0 -i "default" out.mpg
@end example
@example

95
libavdevice/avfoundation.m
View File

@ -42,6 +42,38 @@ static const AVRational avf_time_base_q = {
.den = avf_time_base
};
struct AVFPixelFormatSpec {
enum AVPixelFormat ff_id;
OSType avf_id;
};
static const struct AVFPixelFormatSpec avf_pixel_formats[] = {
{ 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_GRAY8, kCVPixelFormatType_OneComponent8 },
{ AV_PIX_FMT_NONE, 0 }
};
typedef struct
{
AVClass* class;
@ -55,6 +87,7 @@ typedef struct
int list_devices;
int video_device_index;
enum AVPixelFormat pixel_format;
AVCaptureSession *capture_session;
AVCaptureVideoDataOutput *video_output;
@ -233,7 +266,6 @@ static int avf_read_header(AVFormatContext *s)
}
// Attaching output
// FIXME: Allow for a user defined pixel format
ctx->video_output = [[AVCaptureVideoDataOutput alloc] init];
if (!ctx->video_output) {
@ -241,7 +273,63 @@ static int avf_read_header(AVFormatContext *s)
goto fail;
}
NSNumber *pixel_format = [NSNumber numberWithUnsignedInt:kCVPixelFormatType_24RGB];
// select pixel format
struct AVFPixelFormatSpec pxl_fmt_spec;
pxl_fmt_spec.ff_id = AV_PIX_FMT_NONE;
for (int i = 0; avf_pixel_formats[i].ff_id != AV_PIX_FMT_NONE; i++) {
if (ctx->pixel_format == avf_pixel_formats[i].ff_id) {
pxl_fmt_spec = avf_pixel_formats[i];
break;
}
}
// check if selected pixel format is supported by AVFoundation
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;
}
// check if the pixel format is available for this device
if ([[ctx->video_output availableVideoCVPixelFormatTypes] indexOfObject:[NSNumber numberWithInt:pxl_fmt_spec.avf_id]] == NSNotFound) {
av_log(s, AV_LOG_ERROR, "Selected pixel format (%s) is not supported by the input device.\n",
av_get_pix_fmt_name(pxl_fmt_spec.ff_id));
pxl_fmt_spec.ff_id = AV_PIX_FMT_NONE;
av_log(s, AV_LOG_ERROR, "Supported pixel formats:\n");
for (NSNumber *pxl_fmt in [ctx->video_output availableVideoCVPixelFormatTypes]) {
struct AVFPixelFormatSpec pxl_fmt_dummy;
pxl_fmt_dummy.ff_id = AV_PIX_FMT_NONE;
for (int i = 0; avf_pixel_formats[i].ff_id != AV_PIX_FMT_NONE; i++) {
if ([pxl_fmt intValue] == avf_pixel_formats[i].avf_id) {
pxl_fmt_dummy = avf_pixel_formats[i];
break;
}
}
if (pxl_fmt_dummy.ff_id != AV_PIX_FMT_NONE) {
av_log(s, AV_LOG_ERROR, " %s\n", av_get_pix_fmt_name(pxl_fmt_dummy.ff_id));
// select first supported pixel format instead of user selected (or default) pixel format
if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) {
pxl_fmt_spec = pxl_fmt_dummy;
}
}
}
// 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;
} 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));
}
}
NSNumber *pixel_format = [NSNumber numberWithUnsignedInt:pxl_fmt_spec.avf_id];
NSDictionary *capture_dict = [NSDictionary dictionaryWithObject:pixel_format
forKey:(id)kCVPixelBufferPixelFormatTypeKey];
@ -285,7 +373,7 @@ static int avf_read_header(AVFormatContext *s)
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 = AV_PIX_FMT_RGB24;
stream->codec->pix_fmt = pxl_fmt_spec.ff_id;
CFRelease(ctx->current_frame);
ctx->current_frame = nil;
@ -352,6 +440,7 @@ static const AVOption options[] = {
{ "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 },
{ "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 },
};