diff options
author | Anton Khirnov <anton@khirnov.net> | 2013-12-02 22:22:54 +0400 |
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committer | Anton Khirnov <anton@khirnov.net> | 2013-12-05 16:35:55 +0400 |
commit | 24abd806ea0cfb0d988d2f0044eac79cff12918c (patch) | |
tree | c9ad83f6a63c5a18018ef74068e483e662aef858 /libavcodec/ljpegenc.c | |
parent | 86eb2eaac629909d6ee4067c6f1e485a4e70473d (diff) |
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.
Diffstat (limited to 'libavcodec/ljpegenc.c')
-rw-r--r-- | libavcodec/ljpegenc.c | 179 |
1 files changed, 132 insertions, 47 deletions
diff --git a/libavcodec/ljpegenc.c b/libavcodec/ljpegenc.c index 1ca2d37ad1..bb3c188b84 100644 --- a/libavcodec/ljpegenc.c +++ b/libavcodec/ljpegenc.c @@ -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 }, }; 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