diff options
author | Ramiro Polla <ramiro.polla@gmail.com> | 2011-09-09 07:09:23 +0400 |
---|---|---|
committer | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2011-09-12 21:22:10 +0400 |
commit | 1c282f96ab78874cd968ea37b7342bb2d341a84a (patch) | |
tree | 32fb06793add4247e27ff4644e3b6de87382c719 /libavdevice/dshow.c | |
parent | fad4e1a5722cb7d1bb6959d5eb084bf954d96d38 (diff) |
dshow: add option to list devices
Signed-off-by: Stefano Sabatini <stefano.sabatini-lala@poste.it>
Diffstat (limited to 'libavdevice/dshow.c')
-rw-r--r-- | libavdevice/dshow.c | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/libavdevice/dshow.c b/libavdevice/dshow.c index 025237d9eb..2c298b2dda 100644 --- a/libavdevice/dshow.c +++ b/libavdevice/dshow.c @@ -19,14 +19,20 @@ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ +#include "libavutil/opt.h" + #include "avdevice.h" #include "dshow.h" struct dshow_ctx { + const AVClass *class; + IGraphBuilder *graph; char *device_name[2]; + int list_devices; + IBaseFilter *device_filter[2]; IPin *device_pin[2]; libAVFilter *capture_filter[2]; @@ -217,6 +223,7 @@ fail: * Cycle through available devices using the device enumerator devenum, * retrieve the device with type specified by devtype and return the * pointer to the object found in *pfilter. + * If pfilter is NULL, list all device names. */ static int dshow_cycle_devices(AVFormatContext *avctx, ICreateDevEnum *devenum, @@ -257,10 +264,14 @@ dshow_cycle_devices(AVFormatContext *avctx, ICreateDevEnum *devenum, buf = dup_wchar_to_utf8(var.bstrVal); + if (pfilter) { if (strcmp(device_name, buf)) goto fail1; IMoniker_BindToObject(m, 0, 0, &IID_IBaseFilter, (void *) &device_filter); + } else { + av_log(avctx, AV_LOG_INFO, " \"%s\"\n", buf); + } fail1: if (buf) @@ -272,12 +283,14 @@ fail1: IEnumMoniker_Release(classenum); + if (pfilter) { if (!device_filter) { av_log(avctx, AV_LOG_ERROR, "Could not find %s device.\n", devtypename); return AVERROR(EIO); } *pfilter = device_filter; + } return 0; } @@ -555,7 +568,7 @@ static int dshow_read_header(AVFormatContext *avctx, AVFormatParameters *ap) int ret = AVERROR(EIO); int r; - if (!parse_device_name(avctx)) { + if (!ctx->list_devices && !parse_device_name(avctx)) { av_log(avctx, AV_LOG_ERROR, "Malformed dshow input string.\n"); goto error; } @@ -577,6 +590,15 @@ static int dshow_read_header(AVFormatContext *avctx, AVFormatParameters *ap) goto error; } + if (ctx->list_devices) { + av_log(avctx, AV_LOG_INFO, "DirectShow video devices\n"); + dshow_cycle_devices(avctx, devenum, VideoDevice, NULL); + av_log(avctx, AV_LOG_INFO, "DirectShow audio devices\n"); + dshow_cycle_devices(avctx, devenum, AudioDevice, NULL); + ret = AVERROR_EXIT; + goto error; + } + if (ctx->device_name[VideoDevice]) { ret = dshow_open_device(avctx, devenum, VideoDevice); if (ret < 0) @@ -664,6 +686,22 @@ static int dshow_read_packet(AVFormatContext *s, AVPacket *pkt) return pkt->size; } +#define OFFSET(x) offsetof(struct dshow_ctx, x) +#define DEC AV_OPT_FLAG_DECODING_PARAM +static const AVOption options[] = { + { "list_devices", "list available devices", OFFSET(list_devices), FF_OPT_TYPE_INT, {.dbl=0}, 0, 1, DEC, "list_devices" }, + { "true", "", 0, FF_OPT_TYPE_CONST, {.dbl=1}, 0, 0, DEC, "list_devices" }, + { "false", "", 0, FF_OPT_TYPE_CONST, {.dbl=0}, 0, 0, DEC, "list_devices" }, + { NULL }, +}; + +static const AVClass dshow_class = { + .class_name = "DirectShow indev", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + AVInputFormat ff_dshow_demuxer = { "dshow", NULL_IF_CONFIG_SMALL("DirectShow capture"), @@ -673,4 +711,5 @@ AVInputFormat ff_dshow_demuxer = { dshow_read_packet, dshow_read_close, .flags = AVFMT_NOFILE, + .priv_class = &dshow_class, }; |