add AVOption list_formats to print available pixel formats
---
libavdevice/avfoundation_dec.m | 30 ++++++++++++++++++++++++++----
1 file changed, 26 insertions(+), 4 deletions(-)
diff --git a/libavdevice/avfoundation_dec.m b/libavdevice/avfoundation_dec.m
index c5ec320..0a3f535 100644
--- a/libavdevice/avfoundation_dec.m
+++ b/libavdevice/avfoundation_dec.m
@@ -91,6 +91,7 @@ typedef struct AVFoundationCaptureContext {
AVClass *class;
/* AVOptions */
int list_devices;
+ int list_formats;
enum AVPixelFormat pixel_format;
int video_stream_index;
@@ -114,10 +115,11 @@ typedef struct AVFoundationCaptureContext {
#define OFFSET(x) offsetof(AVFoundationCaptureContext, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
- { "list_devices", "List available devices and exit", OFFSET(list_devices),
AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC, "list_devices" },
- { "all", "Show all the supported devices", OFFSET(list_devices),
AV_OPT_TYPE_CONST, {.i64 = ALL_DEVICES }, 0, INT_MAX, DEC, "list_devices" },
- { "audio", "Show only the audio devices", OFFSET(list_devices),
AV_OPT_TYPE_CONST, {.i64 = AUDIO_DEVICES }, 0, INT_MAX, DEC, "list_devices" },
- { "video", "Show only the video devices", OFFSET(list_devices),
AV_OPT_TYPE_CONST, {.i64 = VIDEO_DEVICES }, 0, INT_MAX, DEC, "list_devices" },
+ { "list_devices", "List available devices and exit", OFFSET(list_devices),
AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC, "list_devices" },
+ { "all", "Show all the supported devices", OFFSET(list_devices),
AV_OPT_TYPE_CONST, {.i64 = ALL_DEVICES }, 0, INT_MAX, DEC, "list_devices" },
+ { "audio", "Show only the audio devices", OFFSET(list_devices),
AV_OPT_TYPE_CONST, {.i64 = AUDIO_DEVICES }, 0, INT_MAX, DEC, "list_devices" },
+ { "video", "Show only the video devices", OFFSET(list_devices),
AV_OPT_TYPE_CONST, {.i64 = VIDEO_DEVICES }, 0, INT_MAX, DEC, "list_devices" },
+ { "list_formats", "List available formats and exit", OFFSET(list_formats),
AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC, "list_formats" },
{ NULL },
};
@@ -152,6 +154,23 @@ static int
avfoundation_list_capture_devices(AVFormatContext *s)
return AVERROR_EXIT;
}
+static int list_formats(AVFormatContext *s)
+{
+ av_log(s, AV_LOG_VERBOSE, "Supported pixel formats (first is more
efficient):\n");
+ AVCaptureVideoDataOutput* out = [[AVCaptureVideoDataOutput alloc] init];
+
+ for (NSNumber *cv_pixel_format in [out availableVideoCVPixelFormatTypes]) {
+ OSType cv_fmt = [cv_pixel_format intValue];
+ enum AVPixelFormat pix_fmt = core_video_to_pix_fmt(cv_fmt);
+ if (pix_fmt != AV_PIX_FMT_NONE) {
+ av_log(s, AV_LOG_VERBOSE, " %s: %d\n",
+ av_get_pix_fmt_name(pix_fmt),
+ cv_fmt);
+ }
+ }
+ return AVERROR_EXIT;
+}
+
static void lock_frames(AVFoundationCaptureContext* ctx)
{
pthread_mutex_lock(&ctx->frame_lock);
@@ -451,6 +470,9 @@ static int avfoundation_read_header(AVFormatContext *s)
ctx->first_pts = av_gettime();
if (ctx->list_devices)
return avfoundation_list_capture_devices(s);
+ if (ctx->list_formats) {
+ return list_formats(s);
+ }
return setup_streams(s);
}
--
2.6.2
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