+static int ljpeg_encode_bgr(AVCodecContext *avctx, PutBitContext *pb,
+ const AVFrame *frame)
+{
+ LJpegEncContext *s = avctx->priv_data;
+ const int width = frame->width;
+ const int height = frame->height;
+ const int linesize = frame->linesize[0];
+ uint16_t (*buffer)[4] = s->scratch;
+ int left[3], top[3], topleft[3];
+ int x, y, i;
+
+#if FF_API_PRIVATE_OPT
+FF_DISABLE_DEPRECATION_WARNINGS
+ if (avctx->prediction_method)
+ s->pred = avctx->prediction_method + 1;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
+ for (i = 0; i < 3; i++)
+ buffer[0][i] = 1 << (9 - 1);
+
+ for (y = 0; y < height; y++) {
+ const int modified_predictor = y ? s->pred : 1;
+ uint8_t *ptr = frame->data[0] + (linesize * y);
+
+ if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) < width * 3 * 3) {
+ av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
+ return -1;
+ }
+
+ for (i = 0; i < 3; i++)
+ top[i]= left[i]= topleft[i]= buffer[0][i];
+
+ for (x = 0; x < width; x++) {
+ buffer[x][1] = ptr[3 * x + 0] - ptr[3 * x + 1] + 0x100;
+ buffer[x][2] = ptr[3 * x + 2] - ptr[3 * x + 1] + 0x100;
+ buffer[x][0] = (ptr[3 * x + 0] + 2 * ptr[3 * x + 1] + ptr[3 * x + 2]) >> 2;
+
+ for (i = 0; i < 3; i++) {
+ int pred, diff;
+
+ PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
+
+ topleft[i] = top[i];
+ top[i] = buffer[x+1][i];
+
+ left[i] = buffer[x][i];
+
+ diff = ((left[i] - pred + 0x100) & 0x1FF) - 0x100;
+
+ if (i == 0)
+ ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
+ else
+ ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
+ }
+ }
+ }
+
+ return 0;
+}
+
+static inline void ljpeg_encode_yuv_mb(LJpegEncContext *s, PutBitContext *pb,
+ const AVFrame *frame, int predictor,
+ int mb_x, int mb_y)
+{
+ int i;
+
+ if (mb_x == 0 || mb_y == 0) {
+ for (i = 0; i < 3; i++) {
+ uint8_t *ptr;
+ int x, y, h, v, linesize;
+ h = s->hsample[i];
+ v = s->vsample[i];
+ linesize = frame->linesize[i];
+
+ for (y = 0; y < v; y++) {
+ for (x = 0; x < h; x++) {
+ int pred;
+
+ ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
+ if (y == 0 && mb_y == 0) {
+ if (x == 0 && mb_x == 0)
+ pred = 128;
+ else
+ pred = ptr[-1];
+ } else {
+ if (x == 0 && mb_x == 0) {
+ pred = ptr[-linesize];
+ } else {
+ PREDICT(pred, ptr[-linesize - 1], ptr[-linesize],
+ ptr[-1], predictor);
+ }
+ }
+
+ if (i == 0)
+ ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
+ else
+ ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
+ }
+ }
+ }
+ } else {
+ for (i = 0; i < 3; i++) {
+ uint8_t *ptr;
+ int x, y, h, v, linesize;
+ h = s->hsample[i];
+ v = s->vsample[i];
+ linesize = frame->linesize[i];
+
+ for (y = 0; y < v; y++) {
+ for (x = 0; x < h; x++) {
+ int pred;
+
+ ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
+ PREDICT(pred, ptr[-linesize - 1], ptr[-linesize], ptr[-1], predictor);
+
+ if (i == 0)
+ ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
+ else
+ ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
+ }
+ }
+ }
+ }
+}
+
+static int ljpeg_encode_yuv(AVCodecContext *avctx, PutBitContext *pb,
+ const AVFrame *frame)
+{
+ LJpegEncContext *s = avctx->priv_data;
+ const int mb_width = (avctx->width + s->hsample[0] - 1) / s->hsample[0];
+ const int mb_height = (avctx->height + s->vsample[0] - 1) / s->vsample[0];
+ int mb_x, mb_y;
+
+#if FF_API_PRIVATE_OPT
+FF_DISABLE_DEPRECATION_WARNINGS
+ if (avctx->prediction_method)
+ s->pred = avctx->prediction_method + 1;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
+ for (mb_y = 0; mb_y < mb_height; mb_y++) {
+ if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) <
+ mb_width * 4 * 3 * s->hsample[0] * s->vsample[0]) {
+ av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
+ return -1;
+ }
+
+ for (mb_x = 0; mb_x < mb_width; mb_x++)
+ ljpeg_encode_yuv_mb(s, pb, frame, s->pred, mb_x, mb_y);
+ }
+
+ return 0;
+}
+