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vfwcap: add video_size private option.

This commit is contained in:
Anton Khirnov 2011-05-24 07:43:01 +02:00
parent 8fe7b6443f
commit 3e15ea2150
1 changed files with 38 additions and 8 deletions
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46
libavdevice/vfwcap.c
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@ -20,6 +20,9 @@
*/
#include "libavformat/avformat.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include <windows.h>
#include <vfw.h>
@ -34,12 +37,14 @@
/* End of missing MinGW defines */
struct vfw_ctx {
const AVClass *class;
HWND hwnd;
HANDLE mutex;
HANDLE event;
AVPacketList *pktl;
unsigned int curbufsize;
unsigned int frame_num;
char *video_size; /**< A string describing video size, set by a private option. */
};
static enum PixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount)
@ -230,6 +235,8 @@ static int vfw_read_close(AVFormatContext *s)
pktl = next;
}
av_freep(&ctx->video_size);
return 0;
}
@ -244,8 +251,6 @@ static int vfw_read_header(AVFormatContext *s, AVFormatParameters *ap)
CAPTUREPARMS cparms;
DWORD biCompression;
WORD biBitCount;
int width;
int height;
int ret;
if (!strcmp(s->filename, "list")) {
@ -318,10 +323,20 @@ static int vfw_read_header(AVFormatContext *s, AVFormatParameters *ap)
dump_bih(s, &bi->bmiHeader);
width = ap->width ? ap->width : bi->bmiHeader.biWidth ;
height = ap->height ? ap->height : bi->bmiHeader.biHeight;
bi->bmiHeader.biWidth = width ;
bi->bmiHeader.biHeight = height;
if (ctx->video_size) {
ret = av_parse_video_size(&bi->bmiHeader.biWidth, &bi->bmiHeader.biHeight, ctx->video_size);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Couldn't parse video size.\n");
goto fail_bi;
}
}
#if FF_API_FORMAT_PARAMETERS
if (ap->width > 0)
bi->bmiHeader.biWidth = ap->width;
if (ap->height > 0)
bi->bmiHeader.biHeight = ap->height;
#endif
if (0) {
/* For testing yet unsupported compressions
@ -370,8 +385,8 @@ static int vfw_read_header(AVFormatContext *s, AVFormatParameters *ap)
codec = st->codec;
codec->time_base = ap->time_base;
codec->codec_type = AVMEDIA_TYPE_VIDEO;
codec->width = width;
codec->height = height;
codec->width = bi->bmiHeader.biWidth;
codec->height = bi->bmiHeader.biHeight;
codec->pix_fmt = vfw_pixfmt(biCompression, biBitCount);
if(codec->pix_fmt == PIX_FMT_NONE) {
codec->codec_id = vfw_codecid(biCompression);
@ -452,6 +467,20 @@ static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt)
return pkt->size;
}
#define OFFSET(x) offsetof(struct vfw_ctx, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
{ NULL },
};
static const AVClass vfw_class = {
.class_name = "VFW indev",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVInputFormat ff_vfwcap_demuxer = {
"vfwcap",
NULL_IF_CONFIG_SMALL("VFW video capture"),
@ -461,4 +490,5 @@ AVInputFormat ff_vfwcap_demuxer = {
vfw_read_packet,
vfw_read_close,
.flags = AVFMT_NOFILE,
.priv_class = &vfw_class,
};