Esempio n. 1
0
static int decode_frame_ilbm(AVCodecContext *avctx,
                            void *data, int *data_size,
                            AVPacket *avpkt)
{
    IffContext *s = avctx->priv_data;
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    const uint8_t *buf_end = buf+buf_size;
    int y, plane;

    if (avctx->reget_buffer(avctx, &s->frame) < 0){
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
        return -1;
    }

    for(y = 0; y < avctx->height; y++ ) {
        uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
        memset(row, 0, avctx->pix_fmt == PIX_FMT_PAL8 ? avctx->width : (avctx->width * 4));
        for (plane = 0; plane < avctx->bits_per_coded_sample && buf < buf_end; plane++) {
            if (avctx->pix_fmt == PIX_FMT_PAL8) {
                decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), avctx->bits_per_coded_sample, plane);
            } else { // PIX_FMT_BGR32
                decodeplane32(row, buf, FFMIN(s->planesize, buf_end - buf), avctx->bits_per_coded_sample, plane);
            }
            buf += s->planesize;
        }
    }

    *data_size = sizeof(AVFrame);
    *(AVFrame*)data = s->frame;
    return buf_size;
}
Esempio n. 2
0
static int decode_frame_byterun1(AVCodecContext *avctx,
                            void *data, int *data_size,
                            AVPacket *avpkt)
{
    IffContext *s = avctx->priv_data;
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    const uint8_t *buf_end = buf+buf_size;
    int y, plane, x;

    if (avctx->reget_buffer(avctx, &s->frame) < 0){
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
        return -1;
    }

    if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved
        if (avctx->pix_fmt == PIX_FMT_PAL8) {
            for(y = 0; y < avctx->height ; y++ ) {
                uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
                memset(row, 0, avctx->width);
                for (plane = 0; plane < avctx->bits_per_coded_sample; plane++) {
                    for(x = 0; x < s->planesize && buf < buf_end; ) {
                        int8_t value = *buf++;
                        unsigned length;
                        if (value >= 0) {
                            length = value + 1;
                            memcpy(s->planebuf + x, buf, FFMIN3(length, s->planesize - x, buf_end - buf));
                            buf += length;
                        } else if (value > -128) {
                            length = -value + 1;
                            memset(s->planebuf + x, *buf++, FFMIN(length, s->planesize - x));
                        } else { //noop
                            continue;
                        }
                        x += length;
                    }
                    decodeplane8(row, s->planebuf, s->planesize, avctx->bits_per_coded_sample, plane);
                }
            }
        } else { //PIX_FMT_BGR32
            for(y = 0; y < avctx->height ; y++ ) {
                uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
                memset(row, 0, avctx->width << 2);
                for (plane = 0; plane < avctx->bits_per_coded_sample; plane++) {
                    for(x = 0; x < s->planesize && buf < buf_end; ) {
                        int8_t value = *buf++;
                        unsigned length;
                        if (value >= 0) {
                            length = value + 1;
                            memcpy(s->planebuf + x, buf, FFMIN3(length, s->planesize - x, buf_end - buf));
                            buf += length;
                        } else if (value > -128) {
                            length = -value + 1;
                            memset(s->planebuf + x, *buf++, FFMIN(length, s->planesize - x));
                        } else { // noop
                            continue;
                        }
                        x += length;
                    }
                    decodeplane32((uint32_t *) row, s->planebuf, s->planesize, avctx->bits_per_coded_sample, plane);
                }
            }
        }
    } else {
        for(y = 0; y < avctx->height ; y++ ) {
            uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
            for(x = 0; x < avctx->width && buf < buf_end; ) {
                int8_t value = *buf++;
                unsigned length;
                if (value >= 0) {
                    length = value + 1;
                    memcpy(row + x, buf, FFMIN3(length, buf_end - buf, avctx->width - x));
                    buf += length;
                } else if (value > -128) {
                    length = -value + 1;
                    memset(row + x, *buf++, FFMIN(length, avctx->width - x));
                } else { //noop
                    continue;
                }
                x += length;
            }
        }
    }

    *data_size = sizeof(AVFrame);
    *(AVFrame*)data = s->frame;
    return buf_size;
}