chasing indexing error

1 files changed, 0 insertions, 1095 deletions

diff --git a/ffmpeg/libavdevice/dshow.c b/ffmpeg/libavdevice/dshow.c
deleted file mode 100644
index 5293d26..0000000
--- a/ffmpeg/libavdevice/dshow.c
+++ /dev/null
@@ -1,1095 +0,0 @@
-/*
- * Directshow capture interface
- * Copyright (c) 2010 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 "libavutil/parseutils.h"
-#include "libavutil/pixdesc.h"
-#include "libavutil/opt.h"
-#include "libavformat/internal.h"
-#include "libavformat/riff.h"
-#include "avdevice.h"
-#include "dshow_capture.h"
-#include "libavcodec/raw.h"
-
-struct dshow_ctx {
-    const AVClass *class;
-
-    IGraphBuilder *graph;
-
-    char *device_name[2];
-    int video_device_number;
-    int audio_device_number;
-
-    int   list_options;
-    int   list_devices;
-    int   audio_buffer_size;
-
-    IBaseFilter *device_filter[2];
-    IPin        *device_pin[2];
-    libAVFilter *capture_filter[2];
-    libAVPin    *capture_pin[2];
-
-    HANDLE mutex;
-    HANDLE event[2]; /* event[0] is set by DirectShow
-                      * event[1] is set by callback() */
-    AVPacketList *pktl;
-
-    int eof;
-
-    int64_t curbufsize;
-    unsigned int video_frame_num;
-
-    IMediaControl *control;
-    IMediaEvent *media_event;
-
-    enum AVPixelFormat pixel_format;
-    enum AVCodecID video_codec_id;
-    char *framerate;
-
-    int requested_width;
-    int requested_height;
-    AVRational requested_framerate;
-
-    int sample_rate;
-    int sample_size;
-    int channels;
-};
-
-static enum AVPixelFormat dshow_pixfmt(DWORD biCompression, WORD biBitCount)
-{
-    switch(biCompression) {
-    case BI_BITFIELDS:
-    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 avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, biCompression); // all others
-}
-
-static int
-dshow_read_close(AVFormatContext *s)
-{
-    struct dshow_ctx *ctx = s->priv_data;
-    AVPacketList *pktl;
-
-    if (ctx->control) {
-        IMediaControl_Stop(ctx->control);
-        IMediaControl_Release(ctx->control);
-    }
-
-    if (ctx->media_event)
-        IMediaEvent_Release(ctx->media_event);
-
-    if (ctx->graph) {
-        IEnumFilters *fenum;
-        int r;
-        r = IGraphBuilder_EnumFilters(ctx->graph, &fenum);
-        if (r == S_OK) {
-            IBaseFilter *f;
-            IEnumFilters_Reset(fenum);
-            while (IEnumFilters_Next(fenum, 1, &f, NULL) == S_OK) {
-                if (IGraphBuilder_RemoveFilter(ctx->graph, f) == S_OK)
-                    IEnumFilters_Reset(fenum); /* When a filter is removed,
-                                                * the list must be reset. */
-                IBaseFilter_Release(f);
-            }
-            IEnumFilters_Release(fenum);
-        }
-        IGraphBuilder_Release(ctx->graph);
-    }
-
-    if (ctx->capture_pin[VideoDevice])
-        libAVPin_Release(ctx->capture_pin[VideoDevice]);
-    if (ctx->capture_pin[AudioDevice])
-        libAVPin_Release(ctx->capture_pin[AudioDevice]);
-    if (ctx->capture_filter[VideoDevice])
-        libAVFilter_Release(ctx->capture_filter[VideoDevice]);
-    if (ctx->capture_filter[AudioDevice])
-        libAVFilter_Release(ctx->capture_filter[AudioDevice]);
-
-    if (ctx->device_pin[VideoDevice])
-        IPin_Release(ctx->device_pin[VideoDevice]);
-    if (ctx->device_pin[AudioDevice])
-        IPin_Release(ctx->device_pin[AudioDevice]);
-    if (ctx->device_filter[VideoDevice])
-        IBaseFilter_Release(ctx->device_filter[VideoDevice]);
-    if (ctx->device_filter[AudioDevice])
-        IBaseFilter_Release(ctx->device_filter[AudioDevice]);
-
-    if (ctx->device_name[0])
-        av_free(ctx->device_name[0]);
-    if (ctx->device_name[1])
-        av_free(ctx->device_name[1]);
-
-    if(ctx->mutex)
-        CloseHandle(ctx->mutex);
-    if(ctx->event[0])
-        CloseHandle(ctx->event[0]);
-    if(ctx->event[1])
-        CloseHandle(ctx->event[1]);
-
-    pktl = ctx->pktl;
-    while (pktl) {
-        AVPacketList *next = pktl->next;
-        av_destruct_packet(&pktl->pkt);
-        av_free(pktl);
-        pktl = next;
-    }
-
-    CoUninitialize();
-
-    return 0;
-}
-
-static char *dup_wchar_to_utf8(wchar_t *w)
-{
-    char *s = NULL;
-    int l = WideCharToMultiByte(CP_UTF8, 0, w, -1, 0, 0, 0, 0);
-    s = av_malloc(l);
-    if (s)
-        WideCharToMultiByte(CP_UTF8, 0, w, -1, s, l, 0, 0);
-    return s;
-}
-
-static int shall_we_drop(AVFormatContext *s)
-{
-    struct dshow_ctx *ctx = s->priv_data;
-    static 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->video_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 void
-callback(void *priv_data, int index, uint8_t *buf, int buf_size, int64_t time)
-{
-    AVFormatContext *s = priv_data;
-    struct dshow_ctx *ctx = s->priv_data;
-    AVPacketList **ppktl, *pktl_next;
-
-//    dump_videohdr(s, vdhdr);
-
-    WaitForSingleObject(ctx->mutex, INFINITE);
-
-    if(shall_we_drop(s))
-        goto fail;
-
-    pktl_next = av_mallocz(sizeof(AVPacketList));
-    if(!pktl_next)
-        goto fail;
-
-    if(av_new_packet(&pktl_next->pkt, buf_size) < 0) {
-        av_free(pktl_next);
-        goto fail;
-    }
-
-    pktl_next->pkt.stream_index = index;
-    pktl_next->pkt.pts = time;
-    memcpy(pktl_next->pkt.data, buf, buf_size);
-
-    for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next);
-    *ppktl = pktl_next;
-
-    ctx->curbufsize += buf_size;
-
-    SetEvent(ctx->event[1]);
-    ReleaseMutex(ctx->mutex);
-
-    return;
-fail:
-    ReleaseMutex(ctx->mutex);
-    return;
-}
-
-/**
- * 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,
-                    enum dshowDeviceType devtype, IBaseFilter **pfilter)
-{
-    struct dshow_ctx *ctx = avctx->priv_data;
-    IBaseFilter *device_filter = NULL;
-    IEnumMoniker *classenum = NULL;
-    IMoniker *m = NULL;
-    const char *device_name = ctx->device_name[devtype];
-    int skip = (devtype == VideoDevice) ? ctx->video_device_number
-                                        : ctx->audio_device_number;
-    int r;
-
-    const GUID *device_guid[2] = { &CLSID_VideoInputDeviceCategory,
-                                   &CLSID_AudioInputDeviceCategory };
-    const char *devtypename = (devtype == VideoDevice) ? "video" : "audio";
-
-    r = ICreateDevEnum_CreateClassEnumerator(devenum, device_guid[devtype],
-                                             (IEnumMoniker **) &classenum, 0);
-    if (r != S_OK) {
-        av_log(avctx, AV_LOG_ERROR, "Could not enumerate %s devices.\n",
-               devtypename);
-        return AVERROR(EIO);
-    }
-
-    while (!device_filter && IEnumMoniker_Next(classenum, 1, &m, NULL) == S_OK) {
-        IPropertyBag *bag = NULL;
-        char *buf = NULL;
-        VARIANT var;
-
-        r = IMoniker_BindToStorage(m, 0, 0, &IID_IPropertyBag, (void *) &bag);
-        if (r != S_OK)
-            goto fail1;
-
-        var.vt = VT_BSTR;
-        r = IPropertyBag_Read(bag, L"FriendlyName", &var, NULL);
-        if (r != S_OK)
-            goto fail1;
-
-        buf = dup_wchar_to_utf8(var.bstrVal);
-
-        if (pfilter) {
-            if (strcmp(device_name, buf))
-                goto fail1;
-
-            if (!skip--)
-                IMoniker_BindToObject(m, 0, 0, &IID_IBaseFilter, (void *) &device_filter);
-        } else {
-            av_log(avctx, AV_LOG_INFO, " \"%s\"\n", buf);
-        }
-
-fail1:
-        if (buf)
-            av_free(buf);
-        if (bag)
-            IPropertyBag_Release(bag);
-        IMoniker_Release(m);
-    }
-
-    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;
-}
-
-/**
- * Cycle through available formats using the specified pin,
- * try to set parameters specified through AVOptions and if successful
- * return 1 in *pformat_set.
- * If pformat_set is NULL, list all pin capabilities.
- */
-static void
-dshow_cycle_formats(AVFormatContext *avctx, enum dshowDeviceType devtype,
-                    IPin *pin, int *pformat_set)
-{
-    struct dshow_ctx *ctx = avctx->priv_data;
-    IAMStreamConfig *config = NULL;
-    AM_MEDIA_TYPE *type = NULL;
-    int format_set = 0;
-    void *caps = NULL;
-    int i, n, size;
-
-    if (IPin_QueryInterface(pin, &IID_IAMStreamConfig, (void **) &config) != S_OK)
-        return;
-    if (IAMStreamConfig_GetNumberOfCapabilities(config, &n, &size) != S_OK)
-        goto end;
-
-    caps = av_malloc(size);
-    if (!caps)
-        goto end;
-
-    for (i = 0; i < n && !format_set; i++) {
-        IAMStreamConfig_GetStreamCaps(config, i, &type, (void *) caps);
-
-#if DSHOWDEBUG
-        ff_print_AM_MEDIA_TYPE(type);
-#endif
-
-        if (devtype == VideoDevice) {
-            VIDEO_STREAM_CONFIG_CAPS *vcaps = caps;
-            BITMAPINFOHEADER *bih;
-            int64_t *fr;
-#if DSHOWDEBUG
-            ff_print_VIDEO_STREAM_CONFIG_CAPS(vcaps);
-#endif
-            if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo)) {
-                VIDEOINFOHEADER *v = (void *) type->pbFormat;
-                fr = &v->AvgTimePerFrame;
-                bih = &v->bmiHeader;
-            } else if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo2)) {
-                VIDEOINFOHEADER2 *v = (void *) type->pbFormat;
-                fr = &v->AvgTimePerFrame;
-                bih = &v->bmiHeader;
-            } else {
-                goto next;
-            }
-            if (!pformat_set) {
-                enum AVPixelFormat pix_fmt = dshow_pixfmt(bih->biCompression, bih->biBitCount);
-                if (pix_fmt == AV_PIX_FMT_NONE) {
-                    enum AVCodecID codec_id = ff_codec_get_id(avformat_get_riff_video_tags(), bih->biCompression);
-                    AVCodec *codec = avcodec_find_decoder(codec_id);
-                    if (codec_id == AV_CODEC_ID_NONE || !codec) {
-                        av_log(avctx, AV_LOG_INFO, "  unknown compression type 0x%X", (int) bih->biCompression);
-                    } else {
-                        av_log(avctx, AV_LOG_INFO, "  vcodec=%s", codec->name);
-                    }
-                } else {
-                    av_log(avctx, AV_LOG_INFO, "  pixel_format=%s", av_get_pix_fmt_name(pix_fmt));
-                }
-                av_log(avctx, AV_LOG_INFO, "  min s=%ldx%ld fps=%g max s=%ldx%ld fps=%g\n",
-                       vcaps->MinOutputSize.cx, vcaps->MinOutputSize.cy,
-                       1e7 / vcaps->MaxFrameInterval,
-                       vcaps->MaxOutputSize.cx, vcaps->MaxOutputSize.cy,
-                       1e7 / vcaps->MinFrameInterval);
-                continue;
-            }
-            if (ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO) {
-                if (ctx->video_codec_id != ff_codec_get_id(avformat_get_riff_video_tags(), bih->biCompression))
-                    goto next;
-            }
-            if (ctx->pixel_format != AV_PIX_FMT_NONE &&
-                ctx->pixel_format != dshow_pixfmt(bih->biCompression, bih->biBitCount)) {
-                goto next;
-            }
-            if (ctx->framerate) {
-                int64_t framerate = ((int64_t) ctx->requested_framerate.den*10000000)
-                                            /  ctx->requested_framerate.num;
-                if (framerate > vcaps->MaxFrameInterval ||
-                    framerate < vcaps->MinFrameInterval)
-                    goto next;
-                *fr = framerate;
-            }
-            if (ctx->requested_width && ctx->requested_height) {
-                if (ctx->requested_width  > vcaps->MaxOutputSize.cx ||
-                    ctx->requested_width  < vcaps->MinOutputSize.cx ||
-                    ctx->requested_height > vcaps->MaxOutputSize.cy ||
-                    ctx->requested_height < vcaps->MinOutputSize.cy)
-                    goto next;
-                bih->biWidth  = ctx->requested_width;
-                bih->biHeight = ctx->requested_height;
-            }
-        } else {
-            AUDIO_STREAM_CONFIG_CAPS *acaps = caps;
-            WAVEFORMATEX *fx;
-#if DSHOWDEBUG
-            ff_print_AUDIO_STREAM_CONFIG_CAPS(acaps);
-#endif
-            if (IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx)) {
-                fx = (void *) type->pbFormat;
-            } else {
-                goto next;
-            }
-            if (!pformat_set) {
-                av_log(avctx, AV_LOG_INFO, "  min ch=%lu bits=%lu rate=%6lu max ch=%lu bits=%lu rate=%6lu\n",
-                       acaps->MinimumChannels, acaps->MinimumBitsPerSample, acaps->MinimumSampleFrequency,
-                       acaps->MaximumChannels, acaps->MaximumBitsPerSample, acaps->MaximumSampleFrequency);
-                continue;
-            }
-            if (ctx->sample_rate) {
-                if (ctx->sample_rate > acaps->MaximumSampleFrequency ||
-                    ctx->sample_rate < acaps->MinimumSampleFrequency)
-                    goto next;
-                fx->nSamplesPerSec = ctx->sample_rate;
-            }
-            if (ctx->sample_size) {
-                if (ctx->sample_size > acaps->MaximumBitsPerSample ||
-                    ctx->sample_size < acaps->MinimumBitsPerSample)
-                    goto next;
-                fx->wBitsPerSample = ctx->sample_size;
-            }
-            if (ctx->channels) {
-                if (ctx->channels > acaps->MaximumChannels ||
-                    ctx->channels < acaps->MinimumChannels)
-                    goto next;
-                fx->nChannels = ctx->channels;
-            }
-        }
-        if (IAMStreamConfig_SetFormat(config, type) != S_OK)
-            goto next;
-        format_set = 1;
-next:
-        if (type->pbFormat)
-            CoTaskMemFree(type->pbFormat);
-        CoTaskMemFree(type);
-    }
-end:
-    IAMStreamConfig_Release(config);
-    if (caps)
-        av_free(caps);
-    if (pformat_set)
-        *pformat_set = format_set;
-}
-
-/**
- * Set audio device buffer size in milliseconds (which can directly impact
- * latency, depending on the device).
- */
-static int
-dshow_set_audio_buffer_size(AVFormatContext *avctx, IPin *pin)
-{
-    struct dshow_ctx *ctx = avctx->priv_data;
-    IAMBufferNegotiation *buffer_negotiation = NULL;
-    ALLOCATOR_PROPERTIES props = { -1, -1, -1, -1 };
-    IAMStreamConfig *config = NULL;
-    AM_MEDIA_TYPE *type = NULL;
-    int ret = AVERROR(EIO);
-
-    if (IPin_QueryInterface(pin, &IID_IAMStreamConfig, (void **) &config) != S_OK)
-        goto end;
-    if (IAMStreamConfig_GetFormat(config, &type) != S_OK)
-        goto end;
-    if (!IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx))
-        goto end;
-
-    props.cbBuffer = (((WAVEFORMATEX *) type->pbFormat)->nAvgBytesPerSec)
-                   * ctx->audio_buffer_size / 1000;
-
-    if (IPin_QueryInterface(pin, &IID_IAMBufferNegotiation, (void **) &buffer_negotiation) != S_OK)
-        goto end;
-    if (IAMBufferNegotiation_SuggestAllocatorProperties(buffer_negotiation, &props) != S_OK)
-        goto end;
-
-    ret = 0;
-
-end:
-    if (buffer_negotiation)
-        IAMBufferNegotiation_Release(buffer_negotiation);
-    if (type) {
-        if (type->pbFormat)
-            CoTaskMemFree(type->pbFormat);
-        CoTaskMemFree(type);
-    }
-    if (config)
-        IAMStreamConfig_Release(config);
-
-    return ret;
-}
-
-/**
- * Cycle through available pins using the device_filter device, of type
- * devtype, retrieve the first output pin and return the pointer to the
- * object found in *ppin.
- * If ppin is NULL, cycle through all pins listing audio/video capabilities.
- */
-static int
-dshow_cycle_pins(AVFormatContext *avctx, enum dshowDeviceType devtype,
-                 IBaseFilter *device_filter, IPin **ppin)
-{
-    struct dshow_ctx *ctx = avctx->priv_data;
-    IEnumPins *pins = 0;
-    IPin *device_pin = NULL;
-    IPin *pin;
-    int r;
-
-    const GUID *mediatype[2] = { &MEDIATYPE_Video, &MEDIATYPE_Audio };
-    const char *devtypename = (devtype == VideoDevice) ? "video" : "audio";
-
-    int set_format = (devtype == VideoDevice && (ctx->framerate ||
-                                                (ctx->requested_width && ctx->requested_height) ||
-                                                 ctx->pixel_format != AV_PIX_FMT_NONE ||
-                                                 ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO))
-                  || (devtype == AudioDevice && (ctx->channels || ctx->sample_rate));
-    int format_set = 0;
-
-    r = IBaseFilter_EnumPins(device_filter, &pins);
-    if (r != S_OK) {
-        av_log(avctx, AV_LOG_ERROR, "Could not enumerate pins.\n");
-        return AVERROR(EIO);
-    }
-
-    if (!ppin) {
-        av_log(avctx, AV_LOG_INFO, "DirectShow %s device options\n",
-               devtypename);
-    }
-    while (!device_pin && IEnumPins_Next(pins, 1, &pin, NULL) == S_OK) {
-        IKsPropertySet *p = NULL;
-        IEnumMediaTypes *types = NULL;
-        PIN_INFO info = {0};
-        AM_MEDIA_TYPE *type;
-        GUID category;
-        DWORD r2;
-
-        IPin_QueryPinInfo(pin, &info);
-        IBaseFilter_Release(info.pFilter);
-
-        if (info.dir != PINDIR_OUTPUT)
-            goto next;
-        if (IPin_QueryInterface(pin, &IID_IKsPropertySet, (void **) &p) != S_OK)
-            goto next;
-        if (IKsPropertySet_Get(p, &AMPROPSETID_Pin, AMPROPERTY_PIN_CATEGORY,
-                               NULL, 0, &category, sizeof(GUID), &r2) != S_OK)
-            goto next;
-        if (!IsEqualGUID(&category, &PIN_CATEGORY_CAPTURE))
-            goto next;
-
-        if (!ppin) {
-            char *buf = dup_wchar_to_utf8(info.achName);
-            av_log(avctx, AV_LOG_INFO, " Pin \"%s\"\n", buf);
-            av_free(buf);
-            dshow_cycle_formats(avctx, devtype, pin, NULL);
-            goto next;
-        }
-        if (set_format) {
-            dshow_cycle_formats(avctx, devtype, pin, &format_set);
-            if (!format_set) {
-                goto next;
-            }
-        }
-        if (devtype == AudioDevice && ctx->audio_buffer_size) {
-            if (dshow_set_audio_buffer_size(avctx, pin) < 0)
-                goto next;
-        }
-
-        if (IPin_EnumMediaTypes(pin, &types) != S_OK)
-            goto next;
-
-        IEnumMediaTypes_Reset(types);
-        while (!device_pin && IEnumMediaTypes_Next(types, 1, &type, NULL) == S_OK) {
-            if (IsEqualGUID(&type->majortype, mediatype[devtype])) {
-                device_pin = pin;
-                goto next;
-            }
-            CoTaskMemFree(type);
-        }
-
-next:
-        if (types)
-            IEnumMediaTypes_Release(types);
-        if (p)
-            IKsPropertySet_Release(p);
-        if (device_pin != pin)
-            IPin_Release(pin);
-    }
-
-    IEnumPins_Release(pins);
-
-    if (ppin) {
-        if (set_format && !format_set) {
-            av_log(avctx, AV_LOG_ERROR, "Could not set %s options\n", devtypename);
-            return AVERROR(EIO);
-        }
-        if (!device_pin) {
-            av_log(avctx, AV_LOG_ERROR,
-                "Could not find output pin from %s capture device.\n", devtypename);
-            return AVERROR(EIO);
-        }
-        *ppin = device_pin;
-    }
-
-    return 0;
-}
-
-/**
- * List options for device with type devtype.
- *
- * @param devenum device enumerator used for accessing the device
- */
-static int
-dshow_list_device_options(AVFormatContext *avctx, ICreateDevEnum *devenum,
-                          enum dshowDeviceType devtype)
-{
-    struct dshow_ctx *ctx = avctx->priv_data;
-    IBaseFilter *device_filter = NULL;
-    int r;
-
-    if ((r = dshow_cycle_devices(avctx, devenum, devtype, &device_filter)) < 0)
-        return r;
-    ctx->device_filter[devtype] = device_filter;
-    if ((r = dshow_cycle_pins(avctx, devtype, device_filter, NULL)) < 0)
-        return r;
-
-    return 0;
-}
-
-static int
-dshow_open_device(AVFormatContext *avctx, ICreateDevEnum *devenum,
-                  enum dshowDeviceType devtype)
-{
-    struct dshow_ctx *ctx = avctx->priv_data;
-    IBaseFilter *device_filter = NULL;
-    IGraphBuilder *graph = ctx->graph;
-    IPin *device_pin = NULL;
-    libAVPin *capture_pin = NULL;
-    libAVFilter *capture_filter = NULL;
-    int ret = AVERROR(EIO);
-    int r;
-
-    const wchar_t *filter_name[2] = { L"Audio capture filter", L"Video capture filter" };
-
-    if ((r = dshow_cycle_devices(avctx, devenum, devtype, &device_filter)) < 0) {
-        ret = r;
-        goto error;
-    }
-
-    ctx->device_filter [devtype] = device_filter;
-
-    r = IGraphBuilder_AddFilter(graph, device_filter, NULL);
-    if (r != S_OK) {
-        av_log(avctx, AV_LOG_ERROR, "Could not add device filter to graph.\n");
-        goto error;
-    }
-
-    if ((r = dshow_cycle_pins(avctx, devtype, device_filter, &device_pin)) < 0) {
-        ret = r;
-        goto error;
-    }
-    ctx->device_pin[devtype] = device_pin;
-
-    capture_filter = libAVFilter_Create(avctx, callback, devtype);
-    if (!capture_filter) {
-        av_log(avctx, AV_LOG_ERROR, "Could not create grabber filter.\n");
-        goto error;
-    }
-    ctx->capture_filter[devtype] = capture_filter;
-
-    r = IGraphBuilder_AddFilter(graph, (IBaseFilter *) capture_filter,
-                                filter_name[devtype]);
-    if (r != S_OK) {
-        av_log(avctx, AV_LOG_ERROR, "Could not add capture filter to graph\n");
-        goto error;
-    }
-
-    libAVPin_AddRef(capture_filter->pin);
-    capture_pin = capture_filter->pin;
-    ctx->capture_pin[devtype] = capture_pin;
-
-    r = IGraphBuilder_ConnectDirect(graph, device_pin, (IPin *) capture_pin, NULL);
-    if (r != S_OK) {
-        av_log(avctx, AV_LOG_ERROR, "Could not connect pins\n");
-        goto error;
-    }
-
-    ret = 0;
-
-error:
-    return ret;
-}
-
-static enum AVCodecID waveform_codec_id(enum AVSampleFormat sample_fmt)
-{
-    switch (sample_fmt) {
-    case AV_SAMPLE_FMT_U8:  return AV_CODEC_ID_PCM_U8;
-    case AV_SAMPLE_FMT_S16: return AV_CODEC_ID_PCM_S16LE;
-    case AV_SAMPLE_FMT_S32: return AV_CODEC_ID_PCM_S32LE;
-    default:                return AV_CODEC_ID_NONE; /* Should never happen. */
-    }
-}
-
-static enum AVSampleFormat sample_fmt_bits_per_sample(int bits)
-{
-    switch (bits) {
-    case 8:  return AV_SAMPLE_FMT_U8;
-    case 16: return AV_SAMPLE_FMT_S16;
-    case 32: return AV_SAMPLE_FMT_S32;
-    default: return AV_SAMPLE_FMT_NONE; /* Should never happen. */
-    }
-}
-
-static int
-dshow_add_device(AVFormatContext *avctx,
-                 enum dshowDeviceType devtype)
-{
-    struct dshow_ctx *ctx = avctx->priv_data;
-    AM_MEDIA_TYPE type;
-    AVCodecContext *codec;
-    AVStream *st;
-    int ret = AVERROR(EIO);
-
-    st = avformat_new_stream(avctx, NULL);
-    if (!st) {
-        ret = AVERROR(ENOMEM);
-        goto error;
-    }
-    st->id = devtype;
-
-    ctx->capture_filter[devtype]->stream_index = st->index;
-
-    libAVPin_ConnectionMediaType(ctx->capture_pin[devtype], &type);
-
-    codec = st->codec;
-    if (devtype == VideoDevice) {
-        BITMAPINFOHEADER *bih = NULL;
-        AVRational time_base;
-
-        if (IsEqualGUID(&type.formattype, &FORMAT_VideoInfo)) {
-            VIDEOINFOHEADER *v = (void *) type.pbFormat;
-            time_base = (AVRational) { v->AvgTimePerFrame, 10000000 };
-            bih = &v->bmiHeader;
-        } else if (IsEqualGUID(&type.formattype, &FORMAT_VideoInfo2)) {
-            VIDEOINFOHEADER2 *v = (void *) type.pbFormat;
-            time_base = (AVRational) { v->AvgTimePerFrame, 10000000 };
-            bih = &v->bmiHeader;
-        }
-        if (!bih) {
-            av_log(avctx, AV_LOG_ERROR, "Could not get media type.\n");
-            goto error;
-        }
-
-        codec->time_base  = time_base;
-        codec->codec_type = AVMEDIA_TYPE_VIDEO;
-        codec->width      = bih->biWidth;
-        codec->height     = bih->biHeight;
-        codec->pix_fmt    = dshow_pixfmt(bih->biCompression, bih->biBitCount);
-        if (bih->biCompression == MKTAG('H', 'D', 'Y', 'C')) {
-            av_log(avctx, AV_LOG_DEBUG, "attempt to use full range for HDYC...\n");
-            codec->color_range = AVCOL_RANGE_MPEG; // just in case it needs this...
-        }
-        if (codec->pix_fmt == AV_PIX_FMT_NONE) {
-            codec->codec_id = ff_codec_get_id(avformat_get_riff_video_tags(), bih->biCompression);
-            if (codec->codec_id == AV_CODEC_ID_NONE) {
-                av_log(avctx, AV_LOG_ERROR, "Unknown compression type. "
-                                 "Please report type 0x%X.\n", (int) bih->biCompression);
-                return AVERROR_PATCHWELCOME;
-            }
-            codec->bits_per_coded_sample = bih->biBitCount;
-        } else {
-            codec->codec_id = AV_CODEC_ID_RAWVIDEO;
-            if (bih->biCompression == BI_RGB || bih->biCompression == BI_BITFIELDS) {
-                codec->bits_per_coded_sample = bih->biBitCount;
-                codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE);
-                if (codec->extradata) {
-                    codec->extradata_size = 9;
-                    memcpy(codec->extradata, "BottomUp", 9);
-                }
-            }
-        }
-    } else {
-        WAVEFORMATEX *fx = NULL;
-
-        if (IsEqualGUID(&type.formattype, &FORMAT_WaveFormatEx)) {
-            fx = (void *) type.pbFormat;
-        }
-        if (!fx) {
-            av_log(avctx, AV_LOG_ERROR, "Could not get media type.\n");
-            goto error;
-        }
-
-        codec->codec_type  = AVMEDIA_TYPE_AUDIO;
-        codec->sample_fmt  = sample_fmt_bits_per_sample(fx->wBitsPerSample);
-        codec->codec_id    = waveform_codec_id(codec->sample_fmt);
-        codec->sample_rate = fx->nSamplesPerSec;
-        codec->channels    = fx->nChannels;
-    }
-
-    avpriv_set_pts_info(st, 64, 1, 10000000);
-
-    ret = 0;
-
-error:
-    return ret;
-}
-
-static int parse_device_name(AVFormatContext *avctx)
-{
-    struct dshow_ctx *ctx = avctx->priv_data;
-    char **device_name = ctx->device_name;
-    char *name = av_strdup(avctx->filename);
-    char *tmp = name;
-    int ret = 1;
-    char *type;
-
-    while ((type = strtok(tmp, "="))) {
-        char *token = strtok(NULL, ":");
-        tmp = NULL;
-
-        if        (!strcmp(type, "video")) {
-            device_name[0] = token;
-        } else if (!strcmp(type, "audio")) {
-            device_name[1] = token;
-        } else {
-            device_name[0] = NULL;
-            device_name[1] = NULL;
-            break;
-        }
-    }
-
-    if (!device_name[0] && !device_name[1]) {
-        ret = 0;
-    } else {
-        if (device_name[0])
-            device_name[0] = av_strdup(device_name[0]);
-        if (device_name[1])
-            device_name[1] = av_strdup(device_name[1]);
-    }
-
-    av_free(name);
-    return ret;
-}
-
-static int dshow_read_header(AVFormatContext *avctx)
-{
-    struct dshow_ctx *ctx = avctx->priv_data;
-    IGraphBuilder *graph = NULL;
-    ICreateDevEnum *devenum = NULL;
-    IMediaControl *control = NULL;
-    IMediaEvent *media_event = NULL;
-    HANDLE media_event_handle;
-    HANDLE proc;
-    int ret = AVERROR(EIO);
-    int r;
-
-    CoInitialize(0);
-
-    if (!ctx->list_devices && !parse_device_name(avctx)) {
-        av_log(avctx, AV_LOG_ERROR, "Malformed dshow input string.\n");
-        goto error;
-    }
-
-    ctx->video_codec_id = avctx->video_codec_id ? avctx->video_codec_id
-                                                : AV_CODEC_ID_RAWVIDEO;
-    if (ctx->pixel_format != AV_PIX_FMT_NONE) {
-        if (ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO) {
-            av_log(avctx, AV_LOG_ERROR, "Pixel format may only be set when "
-                              "video codec is not set or set to rawvideo\n");
-            ret = AVERROR(EINVAL);
-            goto error;
-        }
-    }
-    if (ctx->framerate) {
-        r = av_parse_video_rate(&ctx->requested_framerate, ctx->framerate);
-        if (r < 0) {
-            av_log(avctx, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", ctx->framerate);
-            goto error;
-        }
-    }
-
-    r = CoCreateInstance(&CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER,
-                         &IID_IGraphBuilder, (void **) &graph);
-    if (r != S_OK) {
-        av_log(avctx, AV_LOG_ERROR, "Could not create capture graph.\n");
-        goto error;
-    }
-    ctx->graph = graph;
-
-    r = CoCreateInstance(&CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER,
-                         &IID_ICreateDevEnum, (void **) &devenum);
-    if (r != S_OK) {
-        av_log(avctx, AV_LOG_ERROR, "Could not enumerate system devices.\n");
-        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->list_options) {
-        if (ctx->device_name[VideoDevice])
-            dshow_list_device_options(avctx, devenum, VideoDevice);
-        if (ctx->device_name[AudioDevice])
-            dshow_list_device_options(avctx, devenum, AudioDevice);
-        ret = AVERROR_EXIT;
-        goto error;
-    }
-
-    if (ctx->device_name[VideoDevice]) {
-        if ((r = dshow_open_device(avctx, devenum, VideoDevice)) < 0 ||
-            (r = dshow_add_device(avctx, VideoDevice)) < 0) {
-            ret = r;
-            goto error;
-        }
-    }
-    if (ctx->device_name[AudioDevice]) {
-        if ((r = dshow_open_device(avctx, devenum, AudioDevice)) < 0 ||
-            (r = dshow_add_device(avctx, AudioDevice)) < 0) {
-            ret = r;
-            goto error;
-        }
-    }
-
-    ctx->mutex = CreateMutex(NULL, 0, NULL);
-    if (!ctx->mutex) {
-        av_log(avctx, AV_LOG_ERROR, "Could not create Mutex\n");
-        goto error;
-    }
-    ctx->event[1] = CreateEvent(NULL, 1, 0, NULL);
-    if (!ctx->event[1]) {
-        av_log(avctx, AV_LOG_ERROR, "Could not create Event\n");
-        goto error;
-    }
-
-    r = IGraphBuilder_QueryInterface(graph, &IID_IMediaControl, (void **) &control);
-    if (r != S_OK) {
-        av_log(avctx, AV_LOG_ERROR, "Could not get media control.\n");
-        goto error;
-    }
-    ctx->control = control;
-
-    r = IGraphBuilder_QueryInterface(graph, &IID_IMediaEvent, (void **) &media_event);
-    if (r != S_OK) {
-        av_log(avctx, AV_LOG_ERROR, "Could not get media event.\n");
-        goto error;
-    }
-    ctx->media_event = media_event;
-
-    r = IMediaEvent_GetEventHandle(media_event, (void *) &media_event_handle);
-    if (r != S_OK) {
-        av_log(avctx, AV_LOG_ERROR, "Could not get media event handle.\n");
-        goto error;
-    }
-    proc = GetCurrentProcess();
-    r = DuplicateHandle(proc, media_event_handle, proc, &ctx->event[0],
-                        0, 0, DUPLICATE_SAME_ACCESS);
-    if (!r) {
-        av_log(avctx, AV_LOG_ERROR, "Could not duplicate media event handle.\n");
-        goto error;
-    }
-
-    r = IMediaControl_Run(control);
-    if (r == S_FALSE) {
-        OAFilterState pfs;
-        r = IMediaControl_GetState(control, 0, &pfs);
-    }
-    if (r != S_OK) {
-        av_log(avctx, AV_LOG_ERROR, "Could not run filter\n");
-        goto error;
-    }
-
-    ret = 0;
-
-error:
-
-    if (devenum)
-        ICreateDevEnum_Release(devenum);
-
-    if (ret < 0)
-        dshow_read_close(avctx);
-
-    return ret;
-}
-
-/**
- * Checks media events from DirectShow and returns -1 on error or EOF. Also
- * purges all events that might be in the event queue to stop the trigger
- * of event notification.
- */
-static int dshow_check_event_queue(IMediaEvent *media_event)
-{
-    LONG_PTR p1, p2;
-    long code;
-    int ret = 0;
-
-    while (IMediaEvent_GetEvent(media_event, &code, &p1, &p2, 0) != E_ABORT) {
-        if (code == EC_COMPLETE || code == EC_DEVICE_LOST || code == EC_ERRORABORT)
-            ret = -1;
-        IMediaEvent_FreeEventParams(media_event, code, p1, p2);
-    }
-
-    return ret;
-}
-
-static int dshow_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
-    struct dshow_ctx *ctx = s->priv_data;
-    AVPacketList *pktl = NULL;
-
-    while (!ctx->eof && !pktl) {
-        WaitForSingleObject(ctx->mutex, INFINITE);
-        pktl = ctx->pktl;
-        if (pktl) {
-            *pkt = pktl->pkt;
-            ctx->pktl = ctx->pktl->next;
-            av_free(pktl);
-            ctx->curbufsize -= pkt->size;
-        }
-        ResetEvent(ctx->event[1]);
-        ReleaseMutex(ctx->mutex);
-        if (!pktl) {
-            if (dshow_check_event_queue(ctx->media_event) < 0) {
-                ctx->eof = 1;
-            } else if (s->flags & AVFMT_FLAG_NONBLOCK) {
-                return AVERROR(EAGAIN);
-            } else {
-                WaitForMultipleObjects(2, ctx->event, 0, INFINITE);
-            }
-        }
-    }
-
-    return ctx->eof ? AVERROR(EIO) : pkt->size;
-}
-
-#define OFFSET(x) offsetof(struct dshow_ctx, x)
-#define DEC AV_OPT_FLAG_DECODING_PARAM
-static const AVOption options[] = {
-    { "video_size", "set video size given a string such as 640x480 or hd720.", OFFSET(requested_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
-    { "pixel_format", "set video pixel format", OFFSET(pixel_format), AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, INT_MAX, DEC },
-    { "framerate", "set video frame rate", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
-    { "sample_rate", "set audio sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
-    { "sample_size", "set audio sample size", OFFSET(sample_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 16, DEC },
-    { "channels", "set number of audio channels, such as 1 or 2", OFFSET(channels), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
-    { "list_devices", "list available devices", OFFSET(list_devices), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, DEC, "list_devices" },
-    { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "list_devices" },
-    { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "list_devices" },
-    { "list_options", "list available options for specified device", OFFSET(list_options), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, DEC, "list_options" },
-    { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "list_options" },
-    { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "list_options" },
-    { "video_device_number", "set video device number for devices with same name (starts at 0)", OFFSET(video_device_number), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
-    { "audio_device_number", "set audio device number for devices with same name (starts at 0)", OFFSET(audio_device_number), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
-    { "audio_buffer_size", "set audio device buffer latency size in milliseconds (default is the device's default)", OFFSET(audio_buffer_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
-    { NULL },
-};
-
-static const AVClass dshow_class = {
-    .class_name = "dshow indev",
-    .item_name  = av_default_item_name,
-    .option     = options,
-    .version    = LIBAVUTIL_VERSION_INT,
-};
-
-AVInputFormat ff_dshow_demuxer = {
-    .name           = "dshow",
-    .long_name      = NULL_IF_CONFIG_SMALL("DirectShow capture"),
-    .priv_data_size = sizeof(struct dshow_ctx),
-    .read_header    = dshow_read_header,
-    .read_packet    = dshow_read_packet,
-    .read_close     = dshow_read_close,
-    .flags          = AVFMT_NOFILE,
-    .priv_class     = &dshow_class,
-};