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ljpegenc: deMpegEncContextize 

The encoder uses almost none of the mpegvideo infrastructure, only some
fields from MpegEncContext.

The FATE results change because now an all-zero quant matrix is written
into the file. Since it is not used for anything for ljpeg, this should
not be a problem.
tags/n2.2-rc1
Anton Khirnov 12 years ago
parent
86eb2eaac6
commit
24abd806ea
5 changed files with 136 additions and 84 deletions
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  1. +132
    -47
      libavcodec/ljpegenc.c
  2. +0
    -2
      libavcodec/mpegvideo.h
  3. +2
    -33
      libavcodec/mpegvideo_enc.c
  4. +1
    -1
      tests/ref/vsynth/vsynth1-ljpeg
  5. +1
    -1
      tests/ref/vsynth/vsynth2-ljpeg

+ 132
- 47
libavcodec/ljpegenc.c View File

@@ -30,55 +30,68 @@
* lossless JPEG encoder.
*/

#include "libavutil/frame.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"

#include "avcodec.h"
#include "dsputil.h"
#include "internal.h"
#include "mpegvideo.h"
#include "mjpeg.h"
#include "mjpegenc.h"

typedef struct LJpegEncContext {
DSPContext dsp;
ScanTable scantable;
uint16_t matrix[64];

int vsample[3];
int hsample[3];

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];

uint16_t (*scratch)[4];
} LJpegEncContext;

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;
LJpegEncContext *s = avctx->priv_data;
PutBitContext pb;
const int width = avctx->width;
const int height = avctx->height;
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;
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_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];
* 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(&s->pb, pkt->data, pkt->size);
init_put_bits(&pb, pkt->data, pkt->size);

av_frame_unref(p);
ret = av_frame_ref(p, pict);
if (ret < 0)
return ret;
p->pict_type= AV_PICTURE_TYPE_I;
p->key_frame= 1;

ff_mjpeg_encode_picture_header(avctx, &s->pb, &s->intra_scantable,
s->intra_matrix);
ff_mjpeg_encode_picture_header(avctx, &pb, &s->scantable,
s->matrix);

s->header_bits= put_bits_count(&s->pb);
header_bits = put_bits_count(&pb);

if(avctx->pix_fmt == AV_PIX_FMT_BGRA){
int x, y, i;
const int linesize= p->linesize[0];
uint16_t (*buffer)[4]= (void *) s->rd_scratchpad;
const int linesize = pict->linesize[0];
uint16_t (*buffer)[4] = s->scratch;
int left[3], top[3], topleft[3];

for(i=0; i<3; i++){
@@ -87,10 +100,10 @@ static int encode_picture_lossless(AVCodecContext *avctx, AVPacket *pkt,

for(y = 0; y < height; y++) {
const int modified_predictor= y ? predictor : 1;
uint8_t *ptr = p->data[0] + (linesize * y);
uint8_t *ptr = pict->data[0] + (linesize * y);

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");
if(pb.buf_end - pb.buf - (put_bits_count(&pb) >> 3) < width * 3 * 4) {
av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
return -1;
}

@@ -115,9 +128,9 @@ static int encode_picture_lossless(AVCodecContext *avctx, AVPacket *pkt,
diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;

if(i==0)
ff_mjpeg_encode_dc(&s->pb, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
ff_mjpeg_encode_dc(&pb, diff, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
else
ff_mjpeg_encode_dc(&s->pb, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
ff_mjpeg_encode_dc(&pb, diff, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
}
}
}
@@ -125,8 +138,9 @@ static int encode_picture_lossless(AVCodecContext *avctx, AVPacket *pkt,
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");
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++) {
@@ -134,15 +148,15 @@ static int encode_picture_lossless(AVCodecContext *avctx, AVPacket *pkt,
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];
h = s->hsample[i];
v = s->vsample[i];
linesize = pict->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
ptr = pict->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;
@@ -158,9 +172,9 @@ static int encode_picture_lossless(AVCodecContext *avctx, AVPacket *pkt,
}

if(i==0)
ff_mjpeg_encode_dc(&s->pb, *ptr - pred, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
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->pb, *ptr - pred, 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);
}
}
}
@@ -168,8 +182,8 @@ static int encode_picture_lossless(AVCodecContext *avctx, AVPacket *pkt,
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];
h = s->hsample[i];
v = s->vsample[i];
linesize = pict->linesize[i];

for(y=0; y<v; y++){
@@ -180,9 +194,9 @@ static int encode_picture_lossless(AVCodecContext *avctx, AVPacket *pkt,
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);

if(i==0)
ff_mjpeg_encode_dc(&s->pb, *ptr - pred, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
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->pb, *ptr - pred, 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);
}
}
}
@@ -193,11 +207,10 @@ static int encode_picture_lossless(AVCodecContext *avctx, AVPacket *pkt,

emms_c();

ff_mjpeg_encode_picture_trailer(&s->pb, s->header_bits);
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;

@@ -205,14 +218,86 @@ static int encode_picture_lossless(AVCodecContext *avctx, AVPacket *pkt,
// return (put_bits_count(&f->pb)+7)/8;
}

static av_cold int ljpeg_encode_close(AVCodecContext *avctx)
{
LJpegEncContext *s = avctx->priv_data;

av_frame_free(&avctx->coded_frame);
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->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);
}

avctx->coded_frame = av_frame_alloc();
if (!avctx->coded_frame)
return AVERROR(ENOMEM);

avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
avctx->coded_frame->key_frame = 1;

s->scratch = av_malloc_array(avctx->width + 1, sizeof(*s->scratch));

ff_dsputil_init(&s->dsp, avctx);
ff_init_scantable(s->dsp.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_BGRA) {
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 = { //FIXME avoid MPV_* lossless JPEG should not need them
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,
.priv_data_size = sizeof(LJpegEncContext),
.init = ljpeg_encode_init,
.encode2 = encode_picture_lossless,
.close = ff_MPV_encode_end,
.close = ljpeg_encode_close,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_BGRA,
AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_NONE },
};

+ 0
- 2
libavcodec/mpegvideo.h View File

@@ -609,8 +609,6 @@ typedef struct MpegEncContext {

/* MJPEG specific */
struct MJpegContext *mjpeg_ctx;
int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}

/* MSMPEG4 specific */
int mv_table_index;


+ 2
- 33
libavcodec/mpegvideo_enc.c View File

@@ -227,7 +227,6 @@ av_cold int ff_MPV_encode_init(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
int i, ret;
int chroma_h_shift, chroma_v_shift;

MPV_encode_defaults(s);

@@ -240,19 +239,6 @@ av_cold int ff_MPV_encode_init(AVCodecContext *avctx)
return -1;
}
break;
case AV_CODEC_ID_LJPEG:
if (avctx->pix_fmt != AV_PIX_FMT_YUVJ420P &&
avctx->pix_fmt != AV_PIX_FMT_YUVJ422P &&
avctx->pix_fmt != AV_PIX_FMT_YUVJ444P &&
avctx->pix_fmt != AV_PIX_FMT_BGRA &&
((avctx->pix_fmt != AV_PIX_FMT_YUV420P &&
avctx->pix_fmt != AV_PIX_FMT_YUV422P &&
avctx->pix_fmt != AV_PIX_FMT_YUV444P) ||
avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL)) {
av_log(avctx, AV_LOG_ERROR, "colorspace not supported in LJPEG\n");
return -1;
}
break;
case AV_CODEC_ID_MJPEG:
if (avctx->pix_fmt != AV_PIX_FMT_YUVJ420P &&
avctx->pix_fmt != AV_PIX_FMT_YUVJ422P &&
@@ -538,9 +524,6 @@ av_cold int ff_MPV_encode_init(AVCodecContext *avctx)
if (avctx->inter_quant_bias != FF_DEFAULT_QUANT_BIAS)
s->inter_quant_bias = avctx->inter_quant_bias;

av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift,
&chroma_v_shift);

if (avctx->codec_id == AV_CODEC_ID_MPEG4 &&
s->avctx->time_base.den > (1 << 16) - 1) {
av_log(avctx, AV_LOG_ERROR,
@@ -564,24 +547,10 @@ av_cold int ff_MPV_encode_init(AVCodecContext *avctx)
avctx->delay = s->low_delay ? 0 : (s->max_b_frames + 1);
s->rtp_mode = 1;
break;
case AV_CODEC_ID_LJPEG:
case AV_CODEC_ID_MJPEG:
s->out_format = FMT_MJPEG;
s->intra_only = 1; /* force intra only for jpeg */
if (avctx->codec->id == AV_CODEC_ID_LJPEG &&
avctx->pix_fmt == AV_PIX_FMT_BGRA) {
s->mjpeg_vsample[0] = s->mjpeg_hsample[0] =
s->mjpeg_vsample[1] = s->mjpeg_hsample[1] =
s->mjpeg_vsample[2] = s->mjpeg_hsample[2] = 1;
} else {
s->mjpeg_vsample[0] = 2;
s->mjpeg_vsample[1] = 2 >> chroma_v_shift;
s->mjpeg_vsample[2] = 2 >> chroma_v_shift;
s->mjpeg_hsample[0] = 2;
s->mjpeg_hsample[1] = 2 >> chroma_h_shift;
s->mjpeg_hsample[2] = 2 >> chroma_h_shift;
}
if (!(CONFIG_MJPEG_ENCODER || CONFIG_LJPEG_ENCODER) ||
if (!CONFIG_MJPEG_ENCODER ||
ff_mjpeg_encode_init(s) < 0)
return -1;
avctx->delay = 0;
@@ -838,7 +807,7 @@ av_cold int ff_MPV_encode_end(AVCodecContext *avctx)
ff_rate_control_uninit(s);

ff_MPV_common_end(s);
if ((CONFIG_MJPEG_ENCODER || CONFIG_LJPEG_ENCODER) &&
if (CONFIG_MJPEG_ENCODER &&
s->out_format == FMT_MJPEG)
ff_mjpeg_encode_close(s);



+ 1
- 1
tests/ref/vsynth/vsynth1-ljpeg View File

@@ -1,4 +1,4 @@
2b1a2d5ad7f357df955d8548320d13f7 *tests/data/fate/vsynth1-ljpeg.avi
aed2be6710c0dddacfa410dff7ce7e79 *tests/data/fate/vsynth1-ljpeg.avi
6312924 tests/data/fate/vsynth1-ljpeg.avi
c5ccac874dbf808e9088bc3107860042 *tests/data/fate/vsynth1-ljpeg.out.rawvideo
stddev: 0.00 PSNR:999.99 MAXDIFF: 0 bytes: 7603200/ 7603200

+ 1
- 1
tests/ref/vsynth/vsynth2-ljpeg View File

@@ -1,4 +1,4 @@
db9fd56e154b1056c9443a82a96db6f5 *tests/data/fate/vsynth2-ljpeg.avi
5d603cecd59db0f255a53bda837a6bae *tests/data/fate/vsynth2-ljpeg.avi
4766902 tests/data/fate/vsynth2-ljpeg.avi
dde5895817ad9d219f79a52d0bdfb001 *tests/data/fate/vsynth2-ljpeg.out.rawvideo
stddev: 0.00 PSNR:999.99 MAXDIFF: 0 bytes: 7603200/ 7603200

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