Exemple #1
0
static int tqi_decode_frame(AVCodecContext *avctx,
                            void *data, int *got_frame,
                            AVPacket *avpkt)
{
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    const uint8_t *buf_end = buf+buf_size;
    TqiContext *t = avctx->priv_data;
    MpegEncContext *s = &t->s;

    s->width  = AV_RL16(&buf[0]);
    s->height = AV_RL16(&buf[2]);
    tqi_calculate_qtable(s, buf[4]);
    buf += 8;

    if (t->frame.data[0])
        avctx->release_buffer(avctx, &t->frame);

    if (s->avctx->width!=s->width || s->avctx->height!=s->height)
        avcodec_set_dimensions(s->avctx, s->width, s->height);

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

    av_fast_padded_malloc(&t->bitstream_buf, &t->bitstream_buf_size,
                          buf_end - buf);
    if (!t->bitstream_buf)
        return AVERROR(ENOMEM);
    s->dsp.bswap_buf(t->bitstream_buf, (const uint32_t*)buf, (buf_end-buf)/4);
    init_get_bits(&s->gb, t->bitstream_buf, 8*(buf_end-buf));

    s->last_dc[0] = s->last_dc[1] = s->last_dc[2] = 0;
    for (s->mb_y=0; s->mb_y<(avctx->height+15)/16; s->mb_y++)
    for (s->mb_x=0; s->mb_x<(avctx->width+15)/16; s->mb_x++)
    {
        if (tqi_decode_mb(s, t->block) < 0)
            goto end;
        tqi_idct_put(t, t->block);
    }
    end:

    *got_frame = 1;
    *(AVFrame*)data = t->frame;
    return buf_size;
}
Exemple #2
0
static int tqi_decode_frame(AVCodecContext *avctx,
                            void *data, int *got_frame,
                            AVPacket *avpkt)
{
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    const uint8_t *buf_end = buf+buf_size;
    TqiContext *t = avctx->priv_data;
    AVFrame *frame = data;
    int ret, w, h;

    w = AV_RL16(&buf[0]);
    h = AV_RL16(&buf[2]);
    tqi_calculate_qtable(t, buf[4]);
    buf += 8;

    ret = ff_set_dimensions(avctx, w, h);
    if (ret < 0)
        return ret;

    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
        return ret;
    }

    av_fast_padded_malloc(&t->bitstream_buf, &t->bitstream_buf_size,
                          buf_end - buf);
    if (!t->bitstream_buf)
        return AVERROR(ENOMEM);
    t->bsdsp.bswap_buf(t->bitstream_buf, (const uint32_t *) buf,
                       (buf_end - buf) / 4);
    init_get_bits(&t->gb, t->bitstream_buf, 8 * (buf_end - buf));

    t->last_dc[0] =
    t->last_dc[1] =
    t->last_dc[2] = 0;
    for (t->mb_y = 0; t->mb_y < (h + 15) / 16; t->mb_y++) {
        for (t->mb_x = 0; t->mb_x < (w + 15) / 16; t->mb_x++) {
            if (tqi_decode_mb(t, t->block) < 0)
                break;
            tqi_idct_put(avctx, frame, t->block);
        }
    }

    *got_frame = 1;
    return buf_size;
}
Exemple #3
0
static int tqi_decode_frame(AVCodecContext *avctx,
                            void *data, int *got_frame,
                            AVPacket *avpkt)
{
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    const uint8_t *buf_end = buf+buf_size;
    TqiContext *t = avctx->priv_data;
    MpegEncContext *s = &t->s;
    AVFrame *frame = data;
    int ret;

    s->width  = AV_RL16(&buf[0]);
    s->height = AV_RL16(&buf[2]);
    tqi_calculate_qtable(s, buf[4]);
    buf += 8;

    ret = ff_set_dimensions(s->avctx, s->width, s->height);
    if (ret < 0)
        return ret;

    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
        return ret;

    av_fast_padded_malloc(&t->bitstream_buf, &t->bitstream_buf_size,
                          buf_end - buf);
    if (!t->bitstream_buf)
        return AVERROR(ENOMEM);
    t->bsdsp.bswap_buf(t->bitstream_buf, (const uint32_t *) buf,
                       (buf_end - buf) / 4);
    init_get_bits(&s->gb, t->bitstream_buf, 8*(buf_end-buf));

    s->last_dc[0] = s->last_dc[1] = s->last_dc[2] = 0;
    for (s->mb_y=0; s->mb_y<(avctx->height+15)/16; s->mb_y++)
    for (s->mb_x=0; s->mb_x<(avctx->width+15)/16; s->mb_x++)
    {
        if (tqi_decode_mb(s, t->block) < 0)
            goto end;
        tqi_idct_put(t, frame, t->block);
    }
    end:

    *got_frame = 1;
    return buf_size;
}