39 #define HWND_MESSAGE ((HWND) -3) 56 switch(biCompression) {
57 case MKTAG(
'U',
'Y',
'V',
'Y'):
59 case MKTAG(
'Y',
'U',
'Y',
'2'):
61 case MKTAG(
'I',
'4',
'2',
'0'):
84 switch(biCompression) {
85 case MKTAG(
'd',
'v',
's',
'd'):
87 case MKTAG(
'M',
'J',
'P',
'G'):
88 case MKTAG(
'm',
'j',
'p',
'g'):
94 #define dstruct(pctx, sname, var, type) \ 95 av_log(pctx, AV_LOG_DEBUG, #var":\t%"type"\n", sname->var) 100 dstruct(s, cparms, dwRequestMicroSecPerFrame,
"lu");
101 dstruct(s, cparms, fMakeUserHitOKToCapture,
"d");
102 dstruct(s, cparms, wPercentDropForError,
"u");
103 dstruct(s, cparms, fYield,
"d");
104 dstruct(s, cparms, dwIndexSize,
"lu");
105 dstruct(s, cparms, wChunkGranularity,
"u");
106 dstruct(s, cparms, fUsingDOSMemory,
"d");
107 dstruct(s, cparms, wNumVideoRequested,
"u");
108 dstruct(s, cparms, fCaptureAudio,
"d");
109 dstruct(s, cparms, wNumAudioRequested,
"u");
110 dstruct(s, cparms, vKeyAbort,
"u");
111 dstruct(s, cparms, fAbortLeftMouse,
"d");
112 dstruct(s, cparms, fAbortRightMouse,
"d");
113 dstruct(s, cparms, fLimitEnabled,
"d");
114 dstruct(s, cparms, wTimeLimit,
"u");
115 dstruct(s, cparms, fMCIControl,
"d");
116 dstruct(s, cparms, fStepMCIDevice,
"d");
117 dstruct(s, cparms, dwMCIStartTime,
"lu");
118 dstruct(s, cparms, dwMCIStopTime,
"lu");
119 dstruct(s, cparms, fStepCaptureAt2x,
"d");
120 dstruct(s, cparms, wStepCaptureAverageFrames,
"u");
121 dstruct(s, cparms, dwAudioBufferSize,
"lu");
122 dstruct(s, cparms, fDisableWriteCache,
"d");
123 dstruct(s, cparms, AVStreamMaster,
"u");
131 dstruct(s, vhdr, dwBufferLength,
"lu");
132 dstruct(s, vhdr, dwBytesUsed,
"lu");
133 dstruct(s, vhdr, dwTimeCaptured,
"lu");
134 dstruct(s, vhdr, dwUser,
"lu");
135 dstruct(s, vhdr, dwFlags,
"lu");
136 dstruct(s, vhdr, dwReserved[0],
"lu");
137 dstruct(s, vhdr, dwReserved[1],
"lu");
138 dstruct(s, vhdr, dwReserved[2],
"lu");
139 dstruct(s, vhdr, dwReserved[3],
"lu");
147 dstruct(s, bih, biWidth,
"ld");
148 dstruct(s, bih, biHeight,
"ld");
149 dstruct(s, bih, biPlanes,
"d");
150 dstruct(s, bih, biBitCount,
"d");
151 dstruct(s, bih, biCompression,
"lu");
153 (
char*) &bih->biCompression);
154 dstruct(s, bih, biSizeImage,
"lu");
155 dstruct(s, bih, biXPelsPerMeter,
"lu");
156 dstruct(s, bih, biYPelsPerMeter,
"lu");
157 dstruct(s, bih, biClrUsed,
"lu");
158 dstruct(s, bih, biClrImportant,
"lu");
164 static const uint8_t dropscore[4] = { 62, 75, 87, 100 };
168 if(dropscore[++ctx->
frame_num%ndropscores] <= buffer_fullness) {
170 "real-time buffer %d%% full! frame dropped!\n", buffer_fullness);
202 pktl_next->
pkt.
pts = vdhdr->dwTimeCaptured;
203 memcpy(pktl_next->
pkt.
data, vdhdr->lpData, vdhdr->dwBytesUsed);
205 for(ppktl = &ctx->
pktl ; *ppktl ; ppktl = &(*ppktl)->
next);
210 SetEvent(ctx->
event);
211 ReleaseMutex(ctx->
mutex);
215 ReleaseMutex(ctx->
mutex);
225 SendMessage(ctx->
hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
226 SendMessage(ctx->
hwnd, WM_CAP_DRIVER_DISCONNECT, 0, 0);
227 DestroyWindow(ctx->
hwnd);
230 CloseHandle(ctx->
mutex);
232 CloseHandle(ctx->
event);
252 BITMAPINFO *bi =
NULL;
259 if (!strcmp(s->
url,
"list")) {
260 for (devnum = 0; devnum <= 9; devnum++) {
261 char driver_name[256];
262 char driver_ver[256];
263 ret = capGetDriverDescription(devnum,
264 driver_name,
sizeof(driver_name),
265 driver_ver,
sizeof(driver_ver));
282 devnum = atoi(s->
url);
284 ret = SendMessage(ctx->
hwnd, WM_CAP_DRIVER_CONNECT, devnum, 0);
287 DestroyWindow(ctx->
hwnd);
291 SendMessage(ctx->
hwnd, WM_CAP_SET_OVERLAY, 0, 0);
292 SendMessage(ctx->
hwnd, WM_CAP_SET_PREVIEW, 0, 0);
294 ret = SendMessage(ctx->
hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0,
301 SetWindowLongPtr(ctx->
hwnd, GWLP_USERDATA, (LONG_PTR) s);
310 bisize = SendMessage(ctx->
hwnd, WM_CAP_GET_VIDEOFORMAT, 0, 0);
318 ret = SendMessage(ctx->
hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi);
337 bi->bmiHeader.biWidth =
w;
338 bi->bmiHeader.biHeight =
h;
344 bi->bmiHeader.biWidth = 320;
345 bi->bmiHeader.biHeight = 240;
346 bi->bmiHeader.biPlanes = 1;
347 bi->bmiHeader.biBitCount = 12;
348 bi->bmiHeader.biCompression =
MKTAG(
'I',
'4',
'2',
'0');
349 bi->bmiHeader.biSizeImage = 115200;
353 ret = SendMessage(ctx->
hwnd, WM_CAP_SET_VIDEOFORMAT, bisize, (LPARAM) bi);
359 biCompression = bi->bmiHeader.biCompression;
360 biBitCount = bi->bmiHeader.biBitCount;
363 ret = SendMessage(ctx->
hwnd, WM_CAP_GET_SEQUENCE_SETUP,
sizeof(cparms),
371 cparms.dwRequestMicroSecPerFrame =
372 (framerate_q.
den*1000000) / framerate_q.
num;
373 cparms.fAbortLeftMouse = 0;
374 cparms.fAbortRightMouse = 0;
375 cparms.fCaptureAudio = 0;
376 cparms.vKeyAbort = 0;
378 ret = SendMessage(ctx->
hwnd, WM_CAP_SET_SEQUENCE_SETUP,
sizeof(cparms),
387 par->
width = bi->bmiHeader.biWidth;
388 par->
height = bi->bmiHeader.biHeight;
400 if(biCompression == BI_RGB) {
425 ret = SendMessage(ctx->
hwnd, WM_CAP_SEQUENCE_NOFILE, 0, 0);
452 ResetEvent(ctx->
event);
453 ReleaseMutex(ctx->
mutex);
468 #define OFFSET(x) offsetof(struct vfw_ctx, x) 469 #define DEC AV_OPT_FLAG_DECODING_PARAM 487 .priv_data_size =
sizeof(
struct vfw_ctx),
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
int av_parse_video_rate(AVRational *rate, const char *arg)
Parse str and store the detected values in *rate.
#define WaitForSingleObject(a, b)
int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str)
Parse str and put in width_ptr and height_ptr the detected values.
#define LIBAVUTIL_VERSION_INT
static enum AVPixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount)
unsigned int max_picture_buffer
Maximum amount of memory in bytes to use for buffering frames obtained from realtime capture devices...
static void dump_captureparms(AVFormatContext *s, CAPTUREPARMS *cparms)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
const char * av_default_item_name(void *ptr)
Return the context name.
static int vfw_read_close(AVFormatContext *s)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
static const AVClass vfw_class
This struct describes the properties of an encoded stream.
packed RGB 1:2:1 bitstream, 4bpp, (msb)1R 2G 1B(lsb), a byte contains two pixels, the first pixel in ...
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
static void dump_videohdr(AVFormatContext *s, VIDEOHDR *vhdr)
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
int flags
Flags modifying the (de)muxer behaviour.
Main libavdevice API header.
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
static void dump_bih(AVFormatContext *s, BITMAPINFOHEADER *bih)
AVCodecID
Identify the syntax and semantics of the bitstream.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
char * url
input or output URL.
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
enum AVMediaType codec_type
General type of the encoded data.
AVRational avg_frame_rate
Average framerate.
int extradata_size
Size of the extradata content in bytes.
#define dstruct(pctx, sname, var, type)
common internal API header
static enum AVCodecID vfw_codecid(DWORD biCompression)
packed RGB 8:8:8, 24bpp, BGRBGR...
#define FF_ARRAY_ELEMS(a)
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
#define AV_LOG_INFO
Standard information.
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Describe the class of an AVClass context structure.
Rational number (pair of numerator and denominator).
static int vfw_read_header(AVFormatContext *s)
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
AVInputFormat ff_vfwcap_demuxer
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
struct AVPacketList * next
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb...
char * framerate
Set by a private option.
static const AVOption options[]
packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
#define AV_PIX_FMT_RGB555
static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt)
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
char * video_size
A string describing video size, set by a private option.
static int shall_we_drop(AVFormatContext *s)
void * priv_data
Format private data.
int bits_per_coded_sample
The number of bits per sample in the codedwords.
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
static LRESULT CALLBACK videostream_cb(HWND hwnd, LPVIDEOHDR vdhdr)
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
#define MKTAG(a, b, c, d)
AVPixelFormat
Pixel format.
This structure stores compressed data.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...