Function android_camera_read_header

libavdevice/android_camera.c:775–826

}

static int android_camera_read_header(AVFormatContext *avctx)
{
    AndroidCameraCtx *ctx = avctx->priv_data;
    int ret;

    atomic_init(&ctx->got_image_format, 0);
    atomic_init(&ctx->exit, 0);

    ret = av_thread_message_queue_alloc(&ctx->input_queue, ctx->input_queue_size, sizeof(AVPacket));
    if (ret < 0) {
        av_log(avctx, AV_LOG_ERROR,
               "Failed to allocate input queue, error: %s.\n", av_err2str(ret));
        goto error;
    }

    ctx->camera_mgr = ACameraManager_create();
    if (!ctx->camera_mgr) {
        av_log(avctx, AV_LOG_ERROR, "Failed to create Android camera manager.\n");
        ret = AVERROR_EXTERNAL;
        goto error;
    }

    ret = open_camera(avctx);
    if (ret < 0) {
        av_log(avctx, AV_LOG_ERROR, "Failed to open camera.\n");
        goto error;
    }

    get_sensor_orientation(avctx);
    match_video_size(avctx);
    match_framerate(avctx);

    ret = create_image_reader(avctx);
    if (ret < 0) {
        goto error;
    }

    ret = create_capture_session(avctx);
    if (ret < 0) {
        goto error;
    }

    ret = add_video_stream(avctx);

error:
    if (ret < 0) {
        android_camera_read_close(avctx);
        av_log(avctx, AV_LOG_ERROR, "Failed to open android_camera.\n");
    }

    return ret;
}

static int android_camera_read_packet(AVFormatContext *avctx, AVPacket *pkt)
{