Ejemplo n.º 1
0
Archivo: cscd.c Proyecto: jojva/FFmpeg
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
                        AVPacket *avpkt) {
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    CamStudioContext *c = avctx->priv_data;
    int ret;

    if (buf_size < 2) {
        av_log(avctx, AV_LOG_ERROR, "coded frame too small\n");
        return AVERROR_INVALIDDATA;
    }

    if ((ret = ff_reget_buffer(avctx, c->pic)) < 0) {
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
        return ret;
    }

    // decompress data
    switch ((buf[0] >> 1) & 7) {
        case 0: { // lzo compression
            int outlen = c->decomp_size, inlen = buf_size - 2;
            if (av_lzo1x_decode(c->decomp_buf, &outlen, &buf[2], &inlen))
                av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
            break;
        }
        case 1: { // zlib compression
#if CONFIG_ZLIB
            unsigned long dlen = c->decomp_size;
            if (uncompress(c->decomp_buf, &dlen, &buf[2], buf_size - 2) != Z_OK)
                av_log(avctx, AV_LOG_ERROR, "error during zlib decompression\n");
            break;
#else
            av_log(avctx, AV_LOG_ERROR, "compiled without zlib support\n");
            return AVERROR(ENOSYS);
#endif
        }
        default:
            av_log(avctx, AV_LOG_ERROR, "unknown compression\n");
            return AVERROR_INVALIDDATA;
    }

    // flip upside down, add difference frame
    if (buf[0] & 1) { // keyframe
        c->pic->pict_type = AV_PICTURE_TYPE_I;
        c->pic->key_frame = 1;
              copy_frame_default(c->pic, c->decomp_buf,
                                 c->linelen, c->height);
    } else {
        c->pic->pict_type = AV_PICTURE_TYPE_P;
        c->pic->key_frame = 0;
              add_frame_default(c->pic, c->decomp_buf,
                                c->linelen, c->height);
    }

    *got_frame = 1;
    if ((ret = av_frame_ref(data, c->pic)) < 0)
        return ret;

    return buf_size;
}
Ejemplo n.º 2
0
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
                        AVPacket *avpkt) {
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    NuvContext *c = avctx->priv_data;
    AVFrame *picture = data;
    int orig_size = buf_size;
    int keyframe;
    int result;
    enum {NUV_UNCOMPRESSED = '0', NUV_RTJPEG = '1',
          NUV_RTJPEG_IN_LZO = '2', NUV_LZO = '3',
          NUV_BLACK = 'N', NUV_COPY_LAST = 'L'} comptype;

    if (buf_size < 12) {
        av_log(avctx, AV_LOG_ERROR, "coded frame too small\n");
        return -1;
    }

    // codec data (rtjpeg quant tables)
    if (buf[0] == 'D' && buf[1] == 'R') {
        int ret;
        // skip rest of the frameheader.
        buf = &buf[12];
        buf_size -= 12;
        ret = get_quant(avctx, c, buf, buf_size);
        if (ret < 0)
            return ret;
        rtjpeg_decode_init(&c->rtj, &c->dsp, c->width, c->height, c->lq, c->cq);
        return orig_size;
    }

    if (buf[0] != 'V' || buf_size < 12) {
        av_log(avctx, AV_LOG_ERROR, "not a nuv video frame\n");
        return -1;
    }
    comptype = buf[1];
    switch (comptype) {
        case NUV_RTJPEG_IN_LZO:
        case NUV_RTJPEG:
            keyframe = !buf[2]; break;
        case NUV_COPY_LAST:
            keyframe = 0; break;
        default:
            keyframe = 1; break;
    }
    // skip rest of the frameheader.
    buf = &buf[12];
    buf_size -= 12;
    if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO) {
        int outlen = c->decomp_size, inlen = buf_size;
        if (av_lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen))
            av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
        buf = c->decomp_buf;
        buf_size = c->decomp_size;
    }
    if (c->codec_frameheader) {
        int w, h, q;
        if (buf_size < 12) {
            av_log(avctx, AV_LOG_ERROR, "invalid nuv video frame\n");
            return -1;
        }
        w = AV_RL16(&buf[6]);
        h = AV_RL16(&buf[8]);
        q = buf[10];
        if (!codec_reinit(avctx, w, h, q))
            return -1;
        buf = &buf[12];
        buf_size -= 12;
    }

    if (keyframe && c->pic.data[0])
        avctx->release_buffer(avctx, &c->pic);
    c->pic.reference = 3;
    c->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_READABLE |
                          FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
    result = avctx->reget_buffer(avctx, &c->pic);
    if (result < 0) {
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
        return -1;
    }

    c->pic.pict_type = keyframe ? FF_I_TYPE : FF_P_TYPE;
    c->pic.key_frame = keyframe;
    // decompress/copy/whatever data
    switch (comptype) {
        case NUV_LZO:
        case NUV_UNCOMPRESSED: {
            int height = c->height;
            if (buf_size < c->width * height * 3 / 2) {
                av_log(avctx, AV_LOG_ERROR, "uncompressed frame too short\n");
                height = buf_size / c->width / 3 * 2;
            }
            copy_frame(&c->pic, buf, c->width, height);
            break;
        }
        case NUV_RTJPEG_IN_LZO:
        case NUV_RTJPEG: {
            rtjpeg_decode_frame_yuv420(&c->rtj, &c->pic, buf, buf_size);
            break;
        }
        case NUV_BLACK: {
            memset(c->pic.data[0], 0, c->width * c->height);
            memset(c->pic.data[1], 128, c->width * c->height / 4);
            memset(c->pic.data[2], 128, c->width * c->height / 4);
            break;
        }
        case NUV_COPY_LAST: {
            /* nothing more to do here */
            break;
        }
        default:
            av_log(avctx, AV_LOG_ERROR, "unknown compression\n");
            return -1;
    }

    *picture = c->pic;
    *data_size = sizeof(AVFrame);
    return orig_size;
}
Ejemplo n.º 3
0
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
                        AVPacket *avpkt)
{
    const uint8_t *buf = avpkt->data;
    int buf_size       = avpkt->size;
    NuvContext *c      = avctx->priv_data;
    AVFrame *picture   = data;
    int orig_size      = buf_size;
    int keyframe, ret;
    int size_change = 0;
    int result, init_frame = !avctx->frame_number;
    enum {
        NUV_UNCOMPRESSED  = '0',
        NUV_RTJPEG        = '1',
        NUV_RTJPEG_IN_LZO = '2',
        NUV_LZO           = '3',
        NUV_BLACK         = 'N',
        NUV_COPY_LAST     = 'L'
    } comptype;

    if (buf_size < 12) {
        av_log(avctx, AV_LOG_ERROR, "coded frame too small\n");
        return AVERROR_INVALIDDATA;
    }

    // codec data (rtjpeg quant tables)
    if (buf[0] == 'D' && buf[1] == 'R') {
        int ret;
        // skip rest of the frameheader.
        buf       = &buf[12];
        buf_size -= 12;
        ret       = get_quant(avctx, c, buf, buf_size);
        if (ret < 0)
            return ret;
        ff_rtjpeg_decode_init(&c->rtj, c->width, c->height, c->lq, c->cq);
        return orig_size;
    }

    if (buf_size < 12 || buf[0] != 'V') {
        av_log(avctx, AV_LOG_ERROR, "not a nuv video frame\n");
        return AVERROR_INVALIDDATA;
    }
    comptype = buf[1];
    switch (comptype) {
    case NUV_RTJPEG_IN_LZO:
    case NUV_RTJPEG:
        keyframe = !buf[2];
        break;
    case NUV_COPY_LAST:
        keyframe = 0;
        break;
    default:
        keyframe = 1;
        break;
    }
retry:
    // skip rest of the frameheader.
    buf       = &buf[12];
    buf_size -= 12;
    if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO) {
        int outlen = c->decomp_size - FFMAX(FF_INPUT_BUFFER_PADDING_SIZE, AV_LZO_OUTPUT_PADDING);
        int inlen  = buf_size;
        if (av_lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen)) {
            av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
            return AVERROR_INVALIDDATA;
        }
        buf      = c->decomp_buf;
        buf_size = c->decomp_size - FFMAX(FF_INPUT_BUFFER_PADDING_SIZE, AV_LZO_OUTPUT_PADDING) - outlen;
        memset(c->decomp_buf + buf_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
    }
    if (c->codec_frameheader) {
        int w, h, q;
        if (buf_size < RTJPEG_HEADER_SIZE) {
            av_log(avctx, AV_LOG_ERROR, "Too small NUV video frame\n");
            return AVERROR_INVALIDDATA;
        }
        // There seem to exist two variants of this header: one starts with 'V'
        // and 5 bytes unknown, the other matches current MythTV and is 4 bytes size,
        // 1 byte header size (== 12), 1 byte version (== 0)
        if (buf[0] != 'V' && AV_RL16(&buf[4]) != 0x000c) {
            av_log(avctx, AV_LOG_ERROR, "Unknown secondary frame header (wrong codec_tag?)\n");
            return AVERROR_INVALIDDATA;
        }
        w = AV_RL16(&buf[6]);
        h = AV_RL16(&buf[8]);
        q = buf[10];
        if ((result = codec_reinit(avctx, w, h, q)) < 0)
            return result;
        if (result) {
            buf = avpkt->data;
            buf_size = avpkt->size;
            size_change = 1;
            goto retry;
        }
        buf       = &buf[RTJPEG_HEADER_SIZE];
        buf_size -= RTJPEG_HEADER_SIZE;
    }

    if (size_change || keyframe) {
        av_frame_unref(c->pic);
        init_frame = 1;
    }

    if ((result = ff_reget_buffer(avctx, c->pic)) < 0)
        return result;
    if (init_frame) {
        memset(c->pic->data[0], 0,    avctx->height * c->pic->linesize[0]);
        memset(c->pic->data[1], 0x80, avctx->height * c->pic->linesize[1] / 2);
        memset(c->pic->data[2], 0x80, avctx->height * c->pic->linesize[2] / 2);
    }

    c->pic->pict_type = keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
    c->pic->key_frame = keyframe;
    // decompress/copy/whatever data
    switch (comptype) {
    case NUV_LZO:
    case NUV_UNCOMPRESSED: {
        int height = c->height;
        if (buf_size < c->width * height * 3 / 2) {
            av_log(avctx, AV_LOG_ERROR, "uncompressed frame too short\n");
            height = buf_size / c->width / 3 * 2;
        }
        if(height > 0)
            copy_frame(c->pic, buf, c->width, height);
        break;
    }
    case NUV_RTJPEG_IN_LZO:
    case NUV_RTJPEG:
        ret = ff_rtjpeg_decode_frame_yuv420(&c->rtj, c->pic, buf, buf_size);
        if (ret < 0)
            return ret;
        break;
    case NUV_BLACK:
        memset(c->pic->data[0], 0, c->width * c->height);
        memset(c->pic->data[1], 128, c->width * c->height / 4);
        memset(c->pic->data[2], 128, c->width * c->height / 4);
        break;
    case NUV_COPY_LAST:
        /* nothing more to do here */
        break;
    default:
        av_log(avctx, AV_LOG_ERROR, "unknown compression\n");
        return AVERROR_INVALIDDATA;
    }

    if ((result = av_frame_ref(picture, c->pic)) < 0)
        return result;

    *got_frame = 1;
    return orig_size;
}
Ejemplo n.º 4
0
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
                        AVPacket *avpkt)
{
	const uint8_t *buf = avpkt->data;
	int buf_size = avpkt->size;
	CamStudioContext *c = avctx->priv_data;
	AVFrame *picture = data;

	if (buf_size < 2)
	{
		av_log(avctx, AV_LOG_ERROR, "coded frame too small\n");
		return -1;
	}

	if (c->pic.data[0])
		avctx->release_buffer(avctx, &c->pic);
	c->pic.reference = 1;
	c->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_READABLE |
	                      FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
	if (avctx->get_buffer(avctx, &c->pic) < 0)
	{
		av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
		return -1;
	}

	// decompress data
	switch ((buf[0] >> 1) & 7)
	{
	case 0:   // lzo compression
	{
		int outlen = c->decomp_size, inlen = buf_size - 2;
		if (av_lzo1x_decode(c->decomp_buf, &outlen, &buf[2], &inlen))
			av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
		break;
	}
	case 1:   // zlib compression
	{
#if CONFIG_ZLIB
		unsigned long dlen = c->decomp_size;
		if (uncompress(c->decomp_buf, &dlen, &buf[2], buf_size - 2) != Z_OK)
			av_log(avctx, AV_LOG_ERROR, "error during zlib decompression\n");
		break;
#else
		av_log(avctx, AV_LOG_ERROR, "compiled without zlib support\n");
		return -1;
#endif
	}
	default:
		av_log(avctx, AV_LOG_ERROR, "unknown compression\n");
		return -1;
	}

	// flip upside down, add difference frame
	if (buf[0] & 1)   // keyframe
	{
		c->pic.pict_type = FF_I_TYPE;
		c->pic.key_frame = 1;
		switch (c->bpp)
		{
		case 16:
			copy_frame_16(&c->pic, c->decomp_buf, c->linelen, c->height);
			break;
		case 32:
			copy_frame_32(&c->pic, c->decomp_buf, c->linelen, c->height);
			break;
		default:
			copy_frame_default(&c->pic, c->decomp_buf, FFALIGN(c->linelen, 4),
			                   c->linelen, c->height);
		}
	}
	else
	{
		c->pic.pict_type = FF_P_TYPE;
		c->pic.key_frame = 0;
		switch (c->bpp)
		{
		case 16:
			add_frame_16(&c->pic, c->decomp_buf, c->linelen, c->height);
			break;
		case 32:
			add_frame_32(&c->pic, c->decomp_buf, c->linelen, c->height);
			break;
		default:
			add_frame_default(&c->pic, c->decomp_buf, FFALIGN(c->linelen, 4),
			                  c->linelen, c->height);
		}
	}

	*picture = c->pic;
	*data_size = sizeof(AVFrame);
	return buf_size;
}
Ejemplo n.º 5
0
int esp_mainloop(struct openconnect_info *vpninfo, int *timeout)
{
	struct esp *esp = &vpninfo->esp_in[vpninfo->current_esp_in];
	struct esp *old_esp = &vpninfo->esp_in[vpninfo->current_esp_in ^ 1];
	struct pkt *this;
	int work_done = 0;
	int ret;

	if (vpninfo->dtls_state == DTLS_SLEEPING) {
		int when = vpninfo->new_dtls_started + vpninfo->dtls_attempt_period - time(NULL);
		if (when <= 0 || vpninfo->dtls_need_reconnect) {
			vpn_progress(vpninfo, PRG_DEBUG, _("Send ESP probes\n"));
			esp_send_probes(vpninfo);
			when = vpninfo->dtls_attempt_period;
		}
		if (*timeout > when * 1000)
			*timeout = when * 1000;
	}
	if (vpninfo->dtls_fd == -1)
		return 0;

	while (1) {
		int len = vpninfo->ip_info.mtu + vpninfo->pkt_trailer;
		int i;
		struct pkt *pkt;

		if (!vpninfo->dtls_pkt) {
			vpninfo->dtls_pkt = malloc(sizeof(struct pkt) + len);
			if (!vpninfo->dtls_pkt) {
				vpn_progress(vpninfo, PRG_ERR, _("Allocation failed\n"));
				break;
			}
		}
		pkt = vpninfo->dtls_pkt;
		len = recv(vpninfo->dtls_fd, (void *)&pkt->esp, len + sizeof(pkt->esp), 0);
		if (len <= 0)
			break;

		vpn_progress(vpninfo, PRG_TRACE, _("Received ESP packet of %d bytes\n"),
			     len);
		work_done = 1;

		if (len <= sizeof(pkt->esp) + 12)
			continue;

		len -= sizeof(pkt->esp) + 12;
		pkt->len = len;

		if (pkt->esp.spi == esp->spi) {
			if (decrypt_esp_packet(vpninfo, esp, pkt))
				continue;
		} else if (pkt->esp.spi == old_esp->spi &&
			   ntohl(pkt->esp.seq) + esp->seq < vpninfo->old_esp_maxseq) {
			vpn_progress(vpninfo, PRG_TRACE,
				     _("Consider SPI 0x%x, seq %u against outgoing ESP setup\n"),
				     (unsigned)ntohl(old_esp->spi), (unsigned)ntohl(pkt->esp.seq));
			if (decrypt_esp_packet(vpninfo, old_esp, pkt))
				continue;
		} else {
			vpn_progress(vpninfo, PRG_DEBUG,
				     _("Received ESP packet with invalid SPI 0x%08x\n"),
				     (unsigned)ntohl(pkt->esp.spi));
			continue;
		}

		if (pkt->data[len - 1] != 0x04 && pkt->data[len - 1] != 0x29 &&
		    pkt->data[len - 1] != 0x05) {
			vpn_progress(vpninfo, PRG_ERR,
				     _("Received ESP packet with unrecognised payload type %02x\n"),
				     pkt->data[len-1]);
			continue;
		}

		if (len <= 2 + pkt->data[len - 2]) {
			vpn_progress(vpninfo, PRG_ERR,
				     _("Invalid padding length %02x in ESP\n"),
				     pkt->data[len - 2]);
			continue;
		}
		pkt->len = len - 2 - pkt->data[len - 2];
		for (i = 0 ; i < pkt->data[len - 2]; i++) {
			if (pkt->data[pkt->len + i] != i + 1)
				break; /* We can't just 'continue' here because it
					* would only break out of this 'for' loop */
		}
		if (i != pkt->data[len - 2]) {
			vpn_progress(vpninfo, PRG_ERR,
				     _("Invalid padding bytes in ESP\n"));
			continue; /* We can here, though */
		}
		vpninfo->dtls_times.last_rx = time(NULL);

		if (pkt->len  == 1 && pkt->data[0] == 0) {
			if (vpninfo->dtls_state == DTLS_SLEEPING) {
				vpn_progress(vpninfo, PRG_INFO,
					     _("ESP session established with server\n"));
				queue_esp_control(vpninfo, 1);
				vpninfo->dtls_state = DTLS_CONNECTING;
			}
			continue;
		}
		if (pkt->data[len - 1] == 0x05) {
			struct pkt *newpkt = malloc(sizeof(*pkt) + vpninfo->ip_info.mtu + vpninfo->pkt_trailer);
			int newlen = vpninfo->ip_info.mtu;
			if (!newpkt) {
				vpn_progress(vpninfo, PRG_ERR,
					     _("Failed to allocate memory to decrypt ESP packet\n"));
				continue;
			}
			if (av_lzo1x_decode(newpkt->data, &newlen,
					    pkt->data, &pkt->len) || pkt->len) {
				vpn_progress(vpninfo, PRG_ERR,
					     _("LZO decompression of ESP packet failed\n"));
				free(newpkt);
				continue;
			}
			newpkt->len = vpninfo->ip_info.mtu - newlen;
			vpn_progress(vpninfo, PRG_TRACE,
				     _("LZO decompressed %d bytes into %d\n"),
				     len - 2 - pkt->data[len-2], newpkt->len);
			queue_packet(&vpninfo->incoming_queue, newpkt);
		} else {
			queue_packet(&vpninfo->incoming_queue, pkt);
			vpninfo->dtls_pkt = NULL;
		}
	}

	if (vpninfo->dtls_state != DTLS_CONNECTED)
		return 0;

	switch (keepalive_action(&vpninfo->dtls_times, timeout)) {
	case KA_REKEY:
		vpn_progress(vpninfo, PRG_ERR, _("Rekey not implemented for ESP\n"));
		break;

	case KA_DPD_DEAD:
		vpn_progress(vpninfo, PRG_ERR, _("ESP detected dead peer\n"));
		queue_esp_control(vpninfo, 0);
		esp_close(vpninfo);
		esp_send_probes(vpninfo);
		return 1;

	case KA_DPD:
		vpn_progress(vpninfo, PRG_DEBUG, _("Send ESP probes for DPD\n"));
		esp_send_probes(vpninfo);
		work_done = 1;
		break;

	case KA_KEEPALIVE:
		vpn_progress(vpninfo, PRG_ERR, _("Keepalive not implemented for ESP\n"));
		break;

	case KA_NONE:
		break;
	}
	unmonitor_write_fd(vpninfo, dtls);
	while ((this = dequeue_packet(&vpninfo->outgoing_queue))) {
		int len;

		len = encrypt_esp_packet(vpninfo, this);
		if (len > 0) {
			ret = send(vpninfo->dtls_fd, (void *)&this->esp, len, 0);
			if (ret < 0) {
				/* Not that this is likely to happen with UDP, but... */
				if (errno == ENOBUFS || errno == EAGAIN || errno == EWOULDBLOCK) {
					monitor_write_fd(vpninfo, dtls);
					/* XXX: Keep the packet somewhere? */
					free(this);
					return work_done;
				} else {
					/* A real error in sending. Fall back to TCP? */
					vpn_progress(vpninfo, PRG_ERR,
						     _("Failed to send ESP packet: %s\n"),
						     strerror(errno));
				}
			} else {
				vpninfo->dtls_times.last_tx = time(NULL);

				vpn_progress(vpninfo, PRG_TRACE, _("Sent ESP packet of %d bytes\n"),
					     len);
			}
		} else {
			/* XXX: Fall back to TCP transport? */
		}
		free(this);
		work_done = 1;
	}

	return work_done;
}
Ejemplo n.º 6
0
// decode a frame
static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags)
{
    int r;
    mp_image_t* mpi;
    lzo_context_t *priv = sh->context;
    int w = priv->bufsz;

    if (len <= 0) {
	    return NULL; // skipped frame
    }

    r = av_lzo1x_decode(priv->buffer, &w, data, &len);
    if (r) {
	/* this should NEVER happen */
	mp_msg (MSGT_DECVIDEO, MSGL_ERR,
		"[%s] internal error - decompression failed: %d\n", MOD_NAME, r);
      return NULL;
    }

    if (priv->codec == -1) {
	// detect RGB24 vs. YV12 via decoded size
	mp_msg (MSGT_DECVIDEO, MSGL_V, "[%s] 2 depth %d, format %d data %p len (%d) (%d)\n",
	    MOD_NAME, sh->bih->biBitCount, sh->format, data, len, sh->bih->biSizeImage
	    );

	if (w == 0) {
	    priv->codec = IMGFMT_BGR24;
	    mp_msg (MSGT_DECVIDEO, MSGL_V, "[%s] codec choosen is BGR24\n", MOD_NAME);
	} else if (w == (sh->bih->biSizeImage)/2) {
	    priv->codec = IMGFMT_YV12;
	    mp_msg (MSGT_DECVIDEO, MSGL_V, "[%s] codec choosen is YV12\n", MOD_NAME);
	} else {
	    priv->codec = -1;
	    mp_msg(MSGT_DECVIDEO,MSGL_ERR,"[%s] Unsupported out_fmt\n", MOD_NAME);
	    return NULL;
	}

	if(!mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,priv->codec)) {
	    priv->codec = -1;
	    return NULL;
	}
    }

    mpi = mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, 0,
	sh->disp_w, sh->disp_h);


    if (!mpi) {
	    mp_msg (MSGT_DECVIDEO, MSGL_ERR, "[%s] mpcodecs_get_image failed\n", MOD_NAME);
	    return NULL;
    }

    mpi->planes[0] = priv->buffer;
    if (priv->codec == IMGFMT_BGR24)
        mpi->stride[0] = 3 * sh->disp_w;
    else {
        mpi->stride[0] = sh->disp_w;
        mpi->planes[2] = priv->buffer + sh->disp_w*sh->disp_h;
        mpi->stride[2] = sh->disp_w / 2;
        mpi->planes[1] = priv->buffer + sh->disp_w*sh->disp_h*5/4;
        mpi->stride[1] = sh->disp_w / 2;
    }

    mp_msg (MSGT_DECVIDEO, MSGL_DBG2,
		"[%s] decompressed %lu bytes into %lu bytes\n", MOD_NAME,
		(long) len, (long)w);

    return mpi;
}