* lossless JPEG encoder.
*/
+#include "libavutil/frame.h"
+#include "libavutil/mem.h"
+#include "libavutil/pixdesc.h"
+
#include "avcodec.h"
-#include "dsputil.h"
+#include "idctdsp.h"
#include "internal.h"
+#include "jpegtables.h"
+#include "mjpegenc_common.h"
#include "mpegvideo.h"
#include "mjpeg.h"
#include "mjpegenc.h"
+typedef struct LJpegEncContext {
+ IDCTDSPContext idsp;
+ ScanTable scantable;
+ uint16_t matrix[64];
-static int encode_picture_lossless(AVCodecContext *avctx, AVPacket *pkt,
- const AVFrame *pict, int *got_packet)
-{
- MpegEncContext * const s = avctx->priv_data;
- MJpegContext * const m = s->mjpeg_ctx;
- const int width= s->width;
- const int height= s->height;
- AVFrame * const p = &s->current_picture.f;
- const int predictor= avctx->prediction_method+1;
- const int mb_width = (width + s->mjpeg_hsample[0] - 1) / s->mjpeg_hsample[0];
- const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
- int ret, max_pkt_size = FF_MIN_BUFFER_SIZE;
-
- if (avctx->pix_fmt == PIX_FMT_BGRA)
- max_pkt_size += width * height * 3 * 4;
- else {
- max_pkt_size += mb_width * mb_height * 3 * 4
- * s->mjpeg_hsample[0] * s->mjpeg_vsample[0];
- }
- if ((ret = ff_alloc_packet(pkt, max_pkt_size)) < 0) {
- av_log(avctx, AV_LOG_ERROR, "Error getting output packet of size %d.\n", max_pkt_size);
- return ret;
- }
-
- init_put_bits(&s->pb, pkt->data, pkt->size);
+ int vsample[3];
+ int hsample[3];
- *p = *pict;
- p->pict_type= AV_PICTURE_TYPE_I;
- p->key_frame= 1;
+ uint16_t huff_code_dc_luminance[12];
+ uint16_t huff_code_dc_chrominance[12];
+ uint8_t huff_size_dc_luminance[12];
+ uint8_t huff_size_dc_chrominance[12];
- ff_mjpeg_encode_picture_header(s);
+ uint16_t (*scratch)[4];
+} LJpegEncContext;
- s->header_bits= put_bits_count(&s->pb);
+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;
+ const int predictor = avctx->prediction_method+1;
+ int left[3], top[3], topleft[3];
+ int x, y, i;
+
+ for (i = 0; i < 3; i++)
+ buffer[0][i] = 1 << (9 - 1);
+
+ for (y = 0; y < height; y++) {
+ const int modified_predictor = y ? predictor : 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;
+ }
- if(avctx->pix_fmt == PIX_FMT_BGRA){
- int x, y, i;
- const int linesize= p->linesize[0];
- uint16_t (*buffer)[4]= (void *) s->rd_scratchpad;
- int left[3], top[3], topleft[3];
+ for (i = 0; i < 3; i++)
+ top[i]= left[i]= topleft[i]= buffer[0][i];
- for(i=0; i<3; i++){
- buffer[0][i]= 1 << (9 - 1);
- }
+ 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(y = 0; y < height; y++) {
- const int modified_predictor= y ? predictor : 1;
- uint8_t *ptr = p->data[0] + (linesize * y);
+ for (i = 0; i < 3; i++) {
+ int pred, diff;
- if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < width*3*4){
- av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
- return -1;
- }
+ PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
- 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[4*x+0] - ptr[4*x+1] + 0x100;
- buffer[x][2] = ptr[4*x+2] - ptr[4*x+1] + 0x100;
- buffer[x][0] = (ptr[4*x+0] + 2*ptr[4*x+1] + ptr[4*x+2])>>2;
+ topleft[i] = top[i];
+ top[i] = buffer[x+1][i];
- for(i=0;i<3;i++) {
- int pred, diff;
+ left[i] = buffer[x][i];
- PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
+ diff = ((left[i] - pred + 0x100) & 0x1FF) - 0x100;
- topleft[i]= top[i];
- top[i]= buffer[x+1][i];
+ 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);
+ }
+ }
+ }
- left[i]= buffer[x][i];
+ return 0;
+}
- diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;
+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(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+ 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(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+ ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
}
}
}
- }else{
- int mb_x, mb_y, i;
-
- for(mb_y = 0; mb_y < mb_height; mb_y++) {
- if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < mb_width * 4 * 3 * s->mjpeg_hsample[0] * s->mjpeg_vsample[0]){
- av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
- return -1;
- }
- for(mb_x = 0; mb_x < mb_width; mb_x++) {
- if(mb_x==0 || mb_y==0){
- for(i=0;i<3;i++) {
- uint8_t *ptr;
- int x, y, h, v, linesize;
- h = s->mjpeg_hsample[i];
- v = s->mjpeg_vsample[i];
- linesize= p->linesize[i];
-
- for(y=0; y<v; y++){
- for(x=0; x<h; x++){
- int pred;
-
- ptr = p->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(s, *ptr - pred, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
- else
- ff_mjpeg_encode_dc(s, *ptr - pred, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
- }
- }
- }
- }else{
- for(i=0;i<3;i++) {
- uint8_t *ptr;
- int x, y, h, v, linesize;
- h = s->mjpeg_hsample[i];
- v = s->mjpeg_vsample[i];
- linesize= p->linesize[i];
-
- for(y=0; y<v; y++){
- for(x=0; x<h; x++){
- int pred;
-
- ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
-//printf("%d %d %d %d %8X\n", mb_x, mb_y, x, y, ptr);
- PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
-
- if(i==0)
- ff_mjpeg_encode_dc(s, *ptr - pred, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
- else
- ff_mjpeg_encode_dc(s, *ptr - pred, m->huff_size_dc_chrominance, m->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)
+{
+ const int predictor = avctx->prediction_method + 1;
+ 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;
+
+ 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, predictor, mb_x, mb_y);
+ }
+
+ return 0;
+}
+
+static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+ const AVFrame *pict, int *got_packet)
+{
+ LJpegEncContext *s = avctx->priv_data;
+ PutBitContext pb;
+ const int width = avctx->width;
+ const int height = avctx->height;
+ const int mb_width = (width + s->hsample[0] - 1) / s->hsample[0];
+ const int mb_height = (height + s->vsample[0] - 1) / s->vsample[0];
+ int max_pkt_size = FF_MIN_BUFFER_SIZE;
+ int ret, header_bits;
+
+ if (avctx->pix_fmt == AV_PIX_FMT_BGR24)
+ max_pkt_size += width * height * 3 * 3;
+ else {
+ max_pkt_size += mb_width * mb_height * 3 * 4
+ * s->hsample[0] * s->vsample[0];
+ }
+ if ((ret = ff_alloc_packet(pkt, max_pkt_size)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting output packet of size %d.\n", max_pkt_size);
+ return ret;
+ }
+
+ init_put_bits(&pb, pkt->data, pkt->size);
+
+ ff_mjpeg_encode_picture_header(avctx, &pb, &s->scantable,
+ s->matrix);
+
+ header_bits = put_bits_count(&pb);
+
+ if (avctx->pix_fmt == AV_PIX_FMT_BGR24)
+ ret = ljpeg_encode_bgr(avctx, &pb, pict);
+ else
+ ret = ljpeg_encode_yuv(avctx, &pb, pict);
+ if (ret < 0)
+ return ret;
emms_c();
- ff_mjpeg_encode_picture_trailer(s);
- s->picture_number++;
+ ff_mjpeg_encode_picture_trailer(&pb, header_bits);
- flush_put_bits(&s->pb);
- pkt->size = put_bits_ptr(&s->pb) - s->pb.buf;
+ flush_put_bits(&pb);
+ pkt->size = put_bits_ptr(&pb) - pb.buf;
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
-// return (put_bits_count(&f->pb)+7)/8;
}
+static av_cold int ljpeg_encode_close(AVCodecContext *avctx)
+{
+ LJpegEncContext *s = avctx->priv_data;
+
+ av_freep(&s->scratch);
+
+ return 0;
+}
+
+static av_cold int ljpeg_encode_init(AVCodecContext *avctx)
+{
+ LJpegEncContext *s = avctx->priv_data;
+ int chroma_v_shift, chroma_h_shift;
+
+ if ((avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
+ avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
+ avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
+ avctx->color_range == AVCOL_RANGE_MPEG) &&
+ avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Limited range YUV is non-standard, set strict_std_compliance to "
+ "at least unofficial to use it.\n");
+ return AVERROR(EINVAL);
+ }
-AVCodec ff_ljpeg_encoder = { //FIXME avoid MPV_* lossless JPEG should not need them
+#if FF_API_CODED_FRAME
+FF_DISABLE_DEPRECATION_WARNINGS
+ avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
+ avctx->coded_frame->key_frame = 1;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
+ s->scratch = av_malloc_array(avctx->width + 1, sizeof(*s->scratch));
+
+ ff_idctdsp_init(&s->idsp, avctx);
+ ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
+ ff_zigzag_direct);
+
+ av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift,
+ &chroma_v_shift);
+
+ if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
+ s->vsample[0] = s->hsample[0] =
+ s->vsample[1] = s->hsample[1] =
+ s->vsample[2] = s->hsample[2] = 1;
+ } else {
+ s->vsample[0] = 2;
+ s->vsample[1] = 2 >> chroma_v_shift;
+ s->vsample[2] = 2 >> chroma_v_shift;
+ s->hsample[0] = 2;
+ s->hsample[1] = 2 >> chroma_h_shift;
+ s->hsample[2] = 2 >> chroma_h_shift;
+ }
+
+ ff_mjpeg_build_huffman_codes(s->huff_size_dc_luminance,
+ s->huff_code_dc_luminance,
+ avpriv_mjpeg_bits_dc_luminance,
+ avpriv_mjpeg_val_dc);
+ ff_mjpeg_build_huffman_codes(s->huff_size_dc_chrominance,
+ s->huff_code_dc_chrominance,
+ avpriv_mjpeg_bits_dc_chrominance,
+ avpriv_mjpeg_val_dc);
+
+ return 0;
+}
+
+AVCodec ff_ljpeg_encoder = {
.name = "ljpeg",
+ .long_name = NULL_IF_CONFIG_SMALL("Lossless JPEG"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_LJPEG,
- .priv_data_size = sizeof(MpegEncContext),
- .init = ff_MPV_encode_init,
- .encode2 = encode_picture_lossless,
- .close = ff_MPV_encode_end,
- .long_name = NULL_IF_CONFIG_SMALL("Lossless JPEG"),
+ .priv_data_size = sizeof(LJpegEncContext),
+ .init = ljpeg_encode_init,
+ .encode2 = ljpeg_encode_frame,
+ .close = ljpeg_encode_close,
+ .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUVJ420P,
+ AV_PIX_FMT_YUVJ422P,
+ AV_PIX_FMT_YUVJ444P,
+ AV_PIX_FMT_BGR24,
+ AV_PIX_FMT_YUV420P,
+ AV_PIX_FMT_YUV422P,
+ AV_PIX_FMT_YUV444P,
+ AV_PIX_FMT_NONE },
};
projects / ffmpeg / blobdiff