Пример #1
0
static int dshow_read_header(AVFormatContext *avctx)
{
    struct dshow_ctx *ctx = avctx->priv_data;
    IGraphBuilder *graph = NULL;
    ICreateDevEnum *devenum = NULL;
    IMediaControl *control = NULL;
    int ret = AVERROR(EIO);
    int r;

    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;
        }
    }

    CoInitialize(0);

    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 = CreateEvent(NULL, 1, 0, NULL);
    if (!ctx->event) {
        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 = 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 (ret < 0)
        dshow_read_close(avctx);

    if (devenum)
        ICreateDevEnum_Release(devenum);

    return ret;
}
Пример #2
0
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 (some may be both video and audio devices)\n");
        dshow_cycle_devices(avctx, devenum, VideoDevice, VideoSourceDevice, NULL);
        av_log(avctx, AV_LOG_INFO, "DirectShow audio devices\n");
        dshow_cycle_devices(avctx, devenum, AudioDevice, AudioSourceDevice, NULL);
        ret = AVERROR_EXIT;
        goto error;
    }
    if (ctx->list_options) {
        if (ctx->device_name[VideoDevice])
            if ((r = dshow_list_device_options(avctx, devenum, VideoDevice, VideoSourceDevice))) {
                ret = r;
                goto error;
            }
        if (ctx->device_name[AudioDevice]) {
            if (dshow_list_device_options(avctx, devenum, AudioDevice, AudioSourceDevice)) {
                /* show audio options from combined video+audio sources as fallback */
                if ((r = dshow_list_device_options(avctx, devenum, AudioDevice, VideoSourceDevice))) {
                    ret = r;
                    goto error;
                }
            }
        }
    }
    if (ctx->device_name[VideoDevice]) {
        if ((r = dshow_open_device(avctx, devenum, VideoDevice, VideoSourceDevice)) < 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, AudioSourceDevice)) < 0 ||
            (r = dshow_add_device(avctx, AudioDevice)) < 0) {
            av_log(avctx, AV_LOG_INFO, "Searching for audio device within video devices for %s\n", ctx->device_name[AudioDevice]);
            /* see if there's a video source with an audio pin with the given audio name */
            if ((r = dshow_open_device(avctx, devenum, AudioDevice, VideoSourceDevice)) < 0 ||
                (r = dshow_add_device(avctx, AudioDevice)) < 0) {
                ret = r;
                goto error;
            }
        }
    }
    if (ctx->list_options) {
        /* allow it to list crossbar options in dshow_open_device */
        ret = AVERROR_EXIT;
        goto error;
    }
    ctx->curbufsize[0] = 0;
    ctx->curbufsize[1] = 0;
    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 graph (sometimes caused by a device already in use by other application)\n");
        goto error;
    }

    ret = 0;

error:

    if (devenum)
        ICreateDevEnum_Release(devenum);

    if (ret < 0)
        dshow_read_close(avctx);

    return ret;
}
Пример #3
0
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 (codec->pix_fmt == AV_PIX_FMT_NONE) {
            codec->codec_id = dshow_codecid(bih->biCompression);
            if (codec->codec_id == AV_CODEC_ID_NONE) {
                av_log(avctx, AV_LOG_ERROR, "Unknown compression type. "
                                 "Please report verbose (-v 9) debug information.\n");
                dshow_read_close(avctx);
                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;
}