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Diffstat (limited to 'ffmpeg1/libavdevice/vfwcap.c')
-rw-r--r--ffmpeg1/libavdevice/vfwcap.c483
1 files changed, 0 insertions, 483 deletions
diff --git a/ffmpeg1/libavdevice/vfwcap.c b/ffmpeg1/libavdevice/vfwcap.c
deleted file mode 100644
index 66b02be..0000000
--- a/ffmpeg1/libavdevice/vfwcap.c
+++ /dev/null
@@ -1,483 +0,0 @@
-/*
- * VFW capture interface
- * Copyright (c) 2006-2008 Ramiro Polla
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "libavformat/internal.h"
-#include "libavutil/log.h"
-#include "libavutil/opt.h"
-#include "libavutil/parseutils.h"
-#include <windows.h>
-#include <vfw.h>
-#include "avdevice.h"
-
-/* Defines for VFW missing from MinGW.
- * Remove this when MinGW incorporates them. */
-#define HWND_MESSAGE ((HWND)-3)
-
-/* 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. */
- char *framerate; /**< Set by a private option. */
-};
-
-static enum AVPixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount)
-{
- switch(biCompression) {
- case MKTAG('U', 'Y', 'V', 'Y'):
- return AV_PIX_FMT_UYVY422;
- case MKTAG('Y', 'U', 'Y', '2'):
- return AV_PIX_FMT_YUYV422;
- case MKTAG('I', '4', '2', '0'):
- return AV_PIX_FMT_YUV420P;
- case BI_RGB:
- switch(biBitCount) { /* 1-8 are untested */
- case 1:
- return AV_PIX_FMT_MONOWHITE;
- case 4:
- return AV_PIX_FMT_RGB4;
- case 8:
- return AV_PIX_FMT_RGB8;
- case 16:
- return AV_PIX_FMT_RGB555;
- case 24:
- return AV_PIX_FMT_BGR24;
- case 32:
- return AV_PIX_FMT_RGB32;
- }
- }
- return AV_PIX_FMT_NONE;
-}
-
-static enum AVCodecID vfw_codecid(DWORD biCompression)
-{
- switch(biCompression) {
- case MKTAG('d', 'v', 's', 'd'):
- return AV_CODEC_ID_DVVIDEO;
- case MKTAG('M', 'J', 'P', 'G'):
- case MKTAG('m', 'j', 'p', 'g'):
- return AV_CODEC_ID_MJPEG;
- }
- return AV_CODEC_ID_NONE;
-}
-
-#define dstruct(pctx, sname, var, type) \
- av_log(pctx, AV_LOG_DEBUG, #var":\t%"type"\n", sname->var)
-
-static void dump_captureparms(AVFormatContext *s, CAPTUREPARMS *cparms)
-{
- av_log(s, AV_LOG_DEBUG, "CAPTUREPARMS\n");
- dstruct(s, cparms, dwRequestMicroSecPerFrame, "lu");
- dstruct(s, cparms, fMakeUserHitOKToCapture, "d");
- dstruct(s, cparms, wPercentDropForError, "u");
- dstruct(s, cparms, fYield, "d");
- dstruct(s, cparms, dwIndexSize, "lu");
- dstruct(s, cparms, wChunkGranularity, "u");
- dstruct(s, cparms, fUsingDOSMemory, "d");
- dstruct(s, cparms, wNumVideoRequested, "u");
- dstruct(s, cparms, fCaptureAudio, "d");
- dstruct(s, cparms, wNumAudioRequested, "u");
- dstruct(s, cparms, vKeyAbort, "u");
- dstruct(s, cparms, fAbortLeftMouse, "d");
- dstruct(s, cparms, fAbortRightMouse, "d");
- dstruct(s, cparms, fLimitEnabled, "d");
- dstruct(s, cparms, wTimeLimit, "u");
- dstruct(s, cparms, fMCIControl, "d");
- dstruct(s, cparms, fStepMCIDevice, "d");
- dstruct(s, cparms, dwMCIStartTime, "lu");
- dstruct(s, cparms, dwMCIStopTime, "lu");
- dstruct(s, cparms, fStepCaptureAt2x, "d");
- dstruct(s, cparms, wStepCaptureAverageFrames, "u");
- dstruct(s, cparms, dwAudioBufferSize, "lu");
- dstruct(s, cparms, fDisableWriteCache, "d");
- dstruct(s, cparms, AVStreamMaster, "u");
-}
-
-static void dump_videohdr(AVFormatContext *s, VIDEOHDR *vhdr)
-{
-#ifdef DEBUG
- av_log(s, AV_LOG_DEBUG, "VIDEOHDR\n");
- dstruct(s, vhdr, lpData, "p");
- dstruct(s, vhdr, dwBufferLength, "lu");
- dstruct(s, vhdr, dwBytesUsed, "lu");
- dstruct(s, vhdr, dwTimeCaptured, "lu");
- dstruct(s, vhdr, dwUser, "lu");
- dstruct(s, vhdr, dwFlags, "lu");
- dstruct(s, vhdr, dwReserved[0], "lu");
- dstruct(s, vhdr, dwReserved[1], "lu");
- dstruct(s, vhdr, dwReserved[2], "lu");
- dstruct(s, vhdr, dwReserved[3], "lu");
-#endif
-}
-
-static void dump_bih(AVFormatContext *s, BITMAPINFOHEADER *bih)
-{
- av_log(s, AV_LOG_DEBUG, "BITMAPINFOHEADER\n");
- dstruct(s, bih, biSize, "lu");
- dstruct(s, bih, biWidth, "ld");
- dstruct(s, bih, biHeight, "ld");
- dstruct(s, bih, biPlanes, "d");
- dstruct(s, bih, biBitCount, "d");
- dstruct(s, bih, biCompression, "lu");
- av_log(s, AV_LOG_DEBUG, " biCompression:\t\"%.4s\"\n",
- (char*) &bih->biCompression);
- dstruct(s, bih, biSizeImage, "lu");
- dstruct(s, bih, biXPelsPerMeter, "lu");
- dstruct(s, bih, biYPelsPerMeter, "lu");
- dstruct(s, bih, biClrUsed, "lu");
- dstruct(s, bih, biClrImportant, "lu");
-}
-
-static int shall_we_drop(AVFormatContext *s)
-{
- struct vfw_ctx *ctx = s->priv_data;
- const uint8_t dropscore[] = {62, 75, 87, 100};
- const int ndropscores = FF_ARRAY_ELEMS(dropscore);
- unsigned int buffer_fullness = (ctx->curbufsize*100)/s->max_picture_buffer;
-
- if(dropscore[++ctx->frame_num%ndropscores] <= buffer_fullness) {
- av_log(s, AV_LOG_ERROR,
- "real-time buffer %d%% full! frame dropped!\n", buffer_fullness);
- return 1;
- }
-
- return 0;
-}
-
-static LRESULT CALLBACK videostream_cb(HWND hwnd, LPVIDEOHDR vdhdr)
-{
- AVFormatContext *s;
- struct vfw_ctx *ctx;
- AVPacketList **ppktl, *pktl_next;
-
- s = (AVFormatContext *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
- ctx = s->priv_data;
-
- dump_videohdr(s, vdhdr);
-
- if(shall_we_drop(s))
- return FALSE;
-
- WaitForSingleObject(ctx->mutex, INFINITE);
-
- pktl_next = av_mallocz(sizeof(AVPacketList));
- if(!pktl_next)
- goto fail;
-
- if(av_new_packet(&pktl_next->pkt, vdhdr->dwBytesUsed) < 0) {
- av_free(pktl_next);
- goto fail;
- }
-
- pktl_next->pkt.pts = vdhdr->dwTimeCaptured;
- memcpy(pktl_next->pkt.data, vdhdr->lpData, vdhdr->dwBytesUsed);
-
- for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next);
- *ppktl = pktl_next;
-
- ctx->curbufsize += vdhdr->dwBytesUsed;
-
- SetEvent(ctx->event);
- ReleaseMutex(ctx->mutex);
-
- return TRUE;
-fail:
- ReleaseMutex(ctx->mutex);
- return FALSE;
-}
-
-static int vfw_read_close(AVFormatContext *s)
-{
- struct vfw_ctx *ctx = s->priv_data;
- AVPacketList *pktl;
-
- if(ctx->hwnd) {
- SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
- SendMessage(ctx->hwnd, WM_CAP_DRIVER_DISCONNECT, 0, 0);
- DestroyWindow(ctx->hwnd);
- }
- if(ctx->mutex)
- CloseHandle(ctx->mutex);
- if(ctx->event)
- CloseHandle(ctx->event);
-
- pktl = ctx->pktl;
- while (pktl) {
- AVPacketList *next = pktl->next;
- av_destruct_packet(&pktl->pkt);
- av_free(pktl);
- pktl = next;
- }
-
- return 0;
-}
-
-static int vfw_read_header(AVFormatContext *s)
-{
- struct vfw_ctx *ctx = s->priv_data;
- AVCodecContext *codec;
- AVStream *st;
- int devnum;
- int bisize;
- BITMAPINFO *bi = NULL;
- CAPTUREPARMS cparms;
- DWORD biCompression;
- WORD biBitCount;
- int ret;
- AVRational framerate_q;
-
- if (!strcmp(s->filename, "list")) {
- for (devnum = 0; devnum <= 9; devnum++) {
- char driver_name[256];
- char driver_ver[256];
- ret = capGetDriverDescription(devnum,
- driver_name, sizeof(driver_name),
- driver_ver, sizeof(driver_ver));
- if (ret) {
- av_log(s, AV_LOG_INFO, "Driver %d\n", devnum);
- av_log(s, AV_LOG_INFO, " %s\n", driver_name);
- av_log(s, AV_LOG_INFO, " %s\n", driver_ver);
- }
- }
- return AVERROR(EIO);
- }
-
- ctx->hwnd = capCreateCaptureWindow(NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, 0);
- if(!ctx->hwnd) {
- av_log(s, AV_LOG_ERROR, "Could not create capture window.\n");
- return AVERROR(EIO);
- }
-
- /* If atoi fails, devnum==0 and the default device is used */
- devnum = atoi(s->filename);
-
- ret = SendMessage(ctx->hwnd, WM_CAP_DRIVER_CONNECT, devnum, 0);
- if(!ret) {
- av_log(s, AV_LOG_ERROR, "Could not connect to device.\n");
- DestroyWindow(ctx->hwnd);
- return AVERROR(ENODEV);
- }
-
- SendMessage(ctx->hwnd, WM_CAP_SET_OVERLAY, 0, 0);
- SendMessage(ctx->hwnd, WM_CAP_SET_PREVIEW, 0, 0);
-
- ret = SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0,
- (LPARAM) videostream_cb);
- if(!ret) {
- av_log(s, AV_LOG_ERROR, "Could not set video stream callback.\n");
- goto fail;
- }
-
- SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) s);
-
- st = avformat_new_stream(s, NULL);
- if(!st) {
- vfw_read_close(s);
- return AVERROR(ENOMEM);
- }
-
- /* Set video format */
- bisize = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, 0, 0);
- if(!bisize)
- goto fail;
- bi = av_malloc(bisize);
- if(!bi) {
- vfw_read_close(s);
- return AVERROR(ENOMEM);
- }
- ret = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi);
- if(!ret)
- goto fail;
-
- dump_bih(s, &bi->bmiHeader);
-
- ret = av_parse_video_rate(&framerate_q, ctx->framerate);
- if (ret < 0) {
- av_log(s, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", ctx->framerate);
- goto fail;
- }
-
- 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;
- }
- }
-
- if (0) {
- /* For testing yet unsupported compressions
- * Copy these values from user-supplied verbose information */
- bi->bmiHeader.biWidth = 320;
- bi->bmiHeader.biHeight = 240;
- bi->bmiHeader.biPlanes = 1;
- bi->bmiHeader.biBitCount = 12;
- bi->bmiHeader.biCompression = MKTAG('I','4','2','0');
- bi->bmiHeader.biSizeImage = 115200;
- dump_bih(s, &bi->bmiHeader);
- }
-
- ret = SendMessage(ctx->hwnd, WM_CAP_SET_VIDEOFORMAT, bisize, (LPARAM) bi);
- if(!ret) {
- av_log(s, AV_LOG_ERROR, "Could not set Video Format.\n");
- goto fail;
- }
-
- biCompression = bi->bmiHeader.biCompression;
- biBitCount = bi->bmiHeader.biBitCount;
-
- /* Set sequence setup */
- ret = SendMessage(ctx->hwnd, WM_CAP_GET_SEQUENCE_SETUP, sizeof(cparms),
- (LPARAM) &cparms);
- if(!ret)
- goto fail;
-
- dump_captureparms(s, &cparms);
-
- cparms.fYield = 1; // Spawn a background thread
- cparms.dwRequestMicroSecPerFrame =
- (framerate_q.den*1000000) / framerate_q.num;
- cparms.fAbortLeftMouse = 0;
- cparms.fAbortRightMouse = 0;
- cparms.fCaptureAudio = 0;
- cparms.vKeyAbort = 0;
-
- ret = SendMessage(ctx->hwnd, WM_CAP_SET_SEQUENCE_SETUP, sizeof(cparms),
- (LPARAM) &cparms);
- if(!ret)
- goto fail;
-
- codec = st->codec;
- codec->time_base = av_inv_q(framerate_q);
- codec->codec_type = AVMEDIA_TYPE_VIDEO;
- codec->width = bi->bmiHeader.biWidth;
- codec->height = bi->bmiHeader.biHeight;
- codec->pix_fmt = vfw_pixfmt(biCompression, biBitCount);
- if(codec->pix_fmt == AV_PIX_FMT_NONE) {
- codec->codec_id = vfw_codecid(biCompression);
- if(codec->codec_id == AV_CODEC_ID_NONE) {
- av_log(s, AV_LOG_ERROR, "Unknown compression type. "
- "Please report verbose (-v 9) debug information.\n");
- vfw_read_close(s);
- return AVERROR_PATCHWELCOME;
- }
- codec->bits_per_coded_sample = biBitCount;
- } else {
- codec->codec_id = AV_CODEC_ID_RAWVIDEO;
- if(biCompression == BI_RGB) {
- codec->bits_per_coded_sample = biBitCount;
- codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE);
- if (codec->extradata) {
- codec->extradata_size = 9;
- memcpy(codec->extradata, "BottomUp", 9);
- }
- }
- }
-
- av_freep(&bi);
-
- avpriv_set_pts_info(st, 32, 1, 1000);
-
- ctx->mutex = CreateMutex(NULL, 0, NULL);
- if(!ctx->mutex) {
- av_log(s, AV_LOG_ERROR, "Could not create Mutex.\n" );
- goto fail;
- }
- ctx->event = CreateEvent(NULL, 1, 0, NULL);
- if(!ctx->event) {
- av_log(s, AV_LOG_ERROR, "Could not create Event.\n" );
- goto fail;
- }
-
- ret = SendMessage(ctx->hwnd, WM_CAP_SEQUENCE_NOFILE, 0, 0);
- if(!ret) {
- av_log(s, AV_LOG_ERROR, "Could not start capture sequence.\n" );
- goto fail;
- }
-
- return 0;
-
-fail:
- av_freep(&bi);
- vfw_read_close(s);
- return AVERROR(EIO);
-}
-
-static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- struct vfw_ctx *ctx = s->priv_data;
- AVPacketList *pktl = NULL;
-
- while(!pktl) {
- WaitForSingleObject(ctx->mutex, INFINITE);
- pktl = ctx->pktl;
- if(ctx->pktl) {
- *pkt = ctx->pktl->pkt;
- ctx->pktl = ctx->pktl->next;
- av_free(pktl);
- }
- ResetEvent(ctx->event);
- ReleaseMutex(ctx->mutex);
- if(!pktl) {
- if(s->flags & AVFMT_FLAG_NONBLOCK) {
- return AVERROR(EAGAIN);
- } else {
- WaitForSingleObject(ctx->event, INFINITE);
- }
- }
- }
-
- ctx->curbufsize -= pkt->size;
-
- 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), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
- { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc"}, 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 = {
- .name = "vfwcap",
- .long_name = NULL_IF_CONFIG_SMALL("VfW video capture"),
- .priv_data_size = sizeof(struct vfw_ctx),
- .read_header = vfw_read_header,
- .read_packet = vfw_read_packet,
- .read_close = vfw_read_close,
- .flags = AVFMT_NOFILE,
- .priv_class = &vfw_class,
-};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 15:39:49 +0000