[FFmpeg-devel] [PATCH] Add get_device_list() to AVFoundation input device.
Daniel Ly
nalply at gmail.com
Tue Apr 28 16:49:58 CEST 2015
This makes avdevice_list_input_sources() available for
device_name = "avfoundation". avf_read_header is retrofitted
to use the new method.
Signed-off-by: Daniel Ly <nalply at gmail.com>
---
libavdevice/avfoundation.m | 139 +++++++++++++++++++++++++++++++++------------
1 file changed, 104 insertions(+), 35 deletions(-)
diff --git a/libavdevice/avfoundation.m b/libavdevice/avfoundation.m
index 763e675..a827248 100644
--- a/libavdevice/avfoundation.m
+++ b/libavdevice/avfoundation.m
@@ -34,6 +34,7 @@
#include "libavformat/internal.h"
#include "libavutil/internal.h"
#include "libavutil/parseutils.h"
+#include "libavutil/avstring.h"
#include "libavutil/time.h"
#include "avdevice.h"
@@ -659,6 +660,98 @@ static int get_audio_config(AVFormatContext *s)
return 0;
}
+static int avf_add_device_info(AVDeviceInfoList *list, AVFormatContext *s,
+ int index, const char *description, const char *model, int do_log)
+{
+ if (do_log) av_log(s->priv_data, AV_LOG_INFO, "[%d] %s\n", index, description);
+ if (!list) return 0;
+
+ AVDeviceInfo *info = av_mallocz(sizeof(AVDeviceInfo));
+ if (!info) return AVERROR(ENOMEM);
+
+ info->device_name = av_asprintf("[%d] %s: %s", index, description, model);
+ info->device_description = strdup(description);
+ if (!info->device_name || !info->device_description) {
+ av_free(info);
+ return AVERROR(ENOMEM);
+ }
+
+ av_dynarray_add(&list->devices, &list->nb_devices, info);
+ return list ? list->nb_devices : AVERROR(ENOMEM);
+}
+
+/**
+ * List AVFoundation video and audio devices into AVDeviceInfoList.
+ *
+ * @param s format context.
+ * @param list device list or NULL (to log only).
+ * @param do_log log the devices if true.
+ */
+static int avf_get_device_list2(struct AVFormatContext *s, struct AVDeviceInfoList *list, int do_log)
+{
+ int result = 0, index;
+ const char *localizedName, *modelID;
+
+ if (do_log) av_log(s->priv_data, AV_LOG_INFO, "AVFoundation video devices:\n");
+ NSArray *video_devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
+ for (AVCaptureDevice *device in video_devices) {
+ @autoreleasepool {
+ index = [video_devices indexOfObject:device];
+ localizedName = [[device localizedName] UTF8String];
+ modelID = [[device modelID] UTF8String];
+
+ result = avf_add_device_info(list, s, index, localizedName, modelID, do_log);
+ if (result < 0) break;
+ }
+ }
+ [video_devices release];
+
+
+#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
+ uint32_t num_screens = 0;
+ CGGetActiveDisplayList(0, NULL, &num_screens);
+
+ if (num_screens > 0) {
+ CGDirectDisplayID screens[num_screens];
+ CGGetActiveDisplayList(num_screens, screens, &num_screens);
+ int i;
+ for (i = 0; i < num_screens; i++) {
+ char buf[30];
+ snprintf(buf, 30, "Capture screen %d", i);
+
+ // No screen name available (as model). Implementation is arcane
+ // and uses deprecated API. See stackoverflow.com/q/24348142/220060
+ result = avf_add_device_info(list, s, index + i + 1, buf, "-", do_log);
+ if (result < 0) break;
+ }
+ }
+#endif
+
+ if (do_log) av_log(s->priv_data, AV_LOG_INFO, "AVFoundation audio devices:\n");
+ NSArray *audio_devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio];
+ for (AVCaptureDevice *device in audio_devices) {
+ @autoreleasepool {
+ index = [audio_devices indexOfObject:device];
+ localizedName = [[device localizedName] UTF8String];
+ modelID = [[device modelID] UTF8String];
+
+ result = avf_add_device_info(list, s, index, localizedName, modelID, do_log);
+ if (result < 0) break;
+ }
+ }
+ [audio_devices release];
+
+ // Make the first device default if it exists.
+ if (list) list->default_device = list->nb_devices > 0 ? 0 : -1;
+
+ return result;
+}
+
+static int avf_get_device_list(struct AVFormatContext *s, struct AVDeviceInfoList *list)
+{
+ return avf_get_device_list2(s, list, FALSE);
+}
+
static int avf_read_header(AVFormatContext *s)
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
@@ -683,32 +776,8 @@ static int avf_read_header(AVFormatContext *s)
// List devices if requested
if (ctx->list_devices) {
- int index = 0;
- av_log(ctx, AV_LOG_INFO, "AVFoundation video devices:\n");
- 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 !TARGET_OS_IPHONE && __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;
+ avf_get_device_list2(s, NULL, TRUE);
+ goto fail;
}
// parse input filename for video and audio device
@@ -887,7 +956,6 @@ static int avf_read_header(AVFormatContext *s)
return 0;
fail:
- [pool release];
destroy_context(ctx);
return AVERROR(EIO);
}
@@ -1038,12 +1106,13 @@ static const AVClass avf_class = {
};
AVInputFormat ff_avfoundation_demuxer = {
- .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,
+ .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,
+ .get_device_list = avf_get_device_list,
+ .flags = AVFMT_NOFILE,
+ .priv_class = &avf_class,
};
--
1.8.1.4
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