| /* |
| * MJPEG encoder |
| * Copyright (c) 2000, 2001 Fabrice Bellard |
| * Copyright (c) 2003 Alex Beregszaszi |
| * Copyright (c) 2003-2004 Michael Niedermayer |
| * |
| * Support for external huffman table, various fixes (AVID workaround), |
| * aspecting, new decode_frame mechanism and apple mjpeg-b support |
| * by Alex Beregszaszi |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * MJPEG encoder. |
| */ |
| |
| #include "libavutil/pixdesc.h" |
| |
| #include "avcodec.h" |
| #include "jpegtables.h" |
| #include "mjpegenc_common.h" |
| #include "mpegvideo.h" |
| #include "mjpeg.h" |
| #include "mjpegenc.h" |
| |
| static uint8_t uni_ac_vlc_len[64 * 64 * 2]; |
| static uint8_t uni_chroma_ac_vlc_len[64 * 64 * 2]; |
| |
| static av_cold void init_uni_ac_vlc(const uint8_t huff_size_ac[256], uint8_t *uni_ac_vlc_len) |
| { |
| int i; |
| |
| for (i = 0; i < 128; i++) { |
| int level = i - 64; |
| int run; |
| if (!level) |
| continue; |
| for (run = 0; run < 64; run++) { |
| int len, code, nbits; |
| int alevel = FFABS(level); |
| |
| len = (run >> 4) * huff_size_ac[0xf0]; |
| |
| nbits= av_log2_16bit(alevel) + 1; |
| code = ((15&run) << 4) | nbits; |
| |
| len += huff_size_ac[code] + nbits; |
| |
| uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len; |
| // We ignore EOB as its just a constant which does not change generally |
| } |
| } |
| } |
| |
| av_cold int ff_mjpeg_encode_init(MpegEncContext *s) |
| { |
| MJpegContext *m; |
| |
| if (s->width > 65500 || s->height > 65500) { |
| av_log(s, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| m = av_malloc(sizeof(MJpegContext)); |
| if (!m) |
| return AVERROR(ENOMEM); |
| |
| s->min_qcoeff=-1023; |
| s->max_qcoeff= 1023; |
| |
| /* build all the huffman tables */ |
| ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance, |
| m->huff_code_dc_luminance, |
| avpriv_mjpeg_bits_dc_luminance, |
| avpriv_mjpeg_val_dc); |
| ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance, |
| m->huff_code_dc_chrominance, |
| avpriv_mjpeg_bits_dc_chrominance, |
| avpriv_mjpeg_val_dc); |
| ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance, |
| m->huff_code_ac_luminance, |
| avpriv_mjpeg_bits_ac_luminance, |
| avpriv_mjpeg_val_ac_luminance); |
| ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance, |
| m->huff_code_ac_chrominance, |
| avpriv_mjpeg_bits_ac_chrominance, |
| avpriv_mjpeg_val_ac_chrominance); |
| |
| init_uni_ac_vlc(m->huff_size_ac_luminance, uni_ac_vlc_len); |
| init_uni_ac_vlc(m->huff_size_ac_chrominance, uni_chroma_ac_vlc_len); |
| s->intra_ac_vlc_length = |
| s->intra_ac_vlc_last_length = uni_ac_vlc_len; |
| s->intra_chroma_ac_vlc_length = |
| s->intra_chroma_ac_vlc_last_length = uni_chroma_ac_vlc_len; |
| |
| s->mjpeg_ctx = m; |
| return 0; |
| } |
| |
| av_cold void ff_mjpeg_encode_close(MpegEncContext *s) |
| { |
| av_freep(&s->mjpeg_ctx); |
| } |
| |
| static void encode_block(MpegEncContext *s, int16_t *block, int n) |
| { |
| int mant, nbits, code, i, j; |
| int component, dc, run, last_index, val; |
| MJpegContext *m = s->mjpeg_ctx; |
| uint8_t *huff_size_ac; |
| uint16_t *huff_code_ac; |
| |
| /* DC coef */ |
| component = (n <= 3 ? 0 : (n&1) + 1); |
| dc = block[0]; /* overflow is impossible */ |
| val = dc - s->last_dc[component]; |
| if (n < 4) { |
| ff_mjpeg_encode_dc(&s->pb, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance); |
| huff_size_ac = m->huff_size_ac_luminance; |
| huff_code_ac = m->huff_code_ac_luminance; |
| } else { |
| ff_mjpeg_encode_dc(&s->pb, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance); |
| huff_size_ac = m->huff_size_ac_chrominance; |
| huff_code_ac = m->huff_code_ac_chrominance; |
| } |
| s->last_dc[component] = dc; |
| |
| /* AC coefs */ |
| |
| run = 0; |
| last_index = s->block_last_index[n]; |
| for(i=1;i<=last_index;i++) { |
| j = s->intra_scantable.permutated[i]; |
| val = block[j]; |
| if (val == 0) { |
| run++; |
| } else { |
| while (run >= 16) { |
| put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]); |
| run -= 16; |
| } |
| mant = val; |
| if (val < 0) { |
| val = -val; |
| mant--; |
| } |
| |
| nbits= av_log2_16bit(val) + 1; |
| code = (run << 4) | nbits; |
| |
| put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]); |
| |
| put_sbits(&s->pb, nbits, mant); |
| run = 0; |
| } |
| } |
| |
| /* output EOB only if not already 64 values */ |
| if (last_index < 63 || run != 0) |
| put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]); |
| } |
| |
| void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64]) |
| { |
| int i; |
| if (s->chroma_format == CHROMA_444) { |
| encode_block(s, block[0], 0); |
| encode_block(s, block[2], 2); |
| encode_block(s, block[4], 4); |
| encode_block(s, block[8], 8); |
| encode_block(s, block[5], 5); |
| encode_block(s, block[9], 9); |
| |
| if (16*s->mb_x+8 < s->width) { |
| encode_block(s, block[1], 1); |
| encode_block(s, block[3], 3); |
| encode_block(s, block[6], 6); |
| encode_block(s, block[10], 10); |
| encode_block(s, block[7], 7); |
| encode_block(s, block[11], 11); |
| } |
| } else { |
| for(i=0;i<5;i++) { |
| encode_block(s, block[i], i); |
| } |
| if (s->chroma_format == CHROMA_420) { |
| encode_block(s, block[5], 5); |
| } else { |
| encode_block(s, block[6], 6); |
| encode_block(s, block[5], 5); |
| encode_block(s, block[7], 7); |
| } |
| } |
| |
| s->i_tex_bits += get_bits_diff(s); |
| } |
| |
| // maximum over s->mjpeg_vsample[i] |
| #define V_MAX 2 |
| static int amv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, |
| const AVFrame *pic_arg, int *got_packet) |
| |
| { |
| MpegEncContext *s = avctx->priv_data; |
| AVFrame *pic; |
| int i, ret; |
| int chroma_h_shift, chroma_v_shift; |
| |
| av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift, &chroma_v_shift); |
| |
| #if FF_API_EMU_EDGE |
| //CODEC_FLAG_EMU_EDGE have to be cleared |
| if(s->avctx->flags & CODEC_FLAG_EMU_EDGE) |
| return AVERROR(EINVAL); |
| #endif |
| |
| if ((avctx->height & 15) && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Heights which are not a multiple of 16 might fail with some decoders, " |
| "use vstrict=-1 / -strict -1 to use %d anyway.\n", avctx->height); |
| av_log(avctx, AV_LOG_WARNING, "If you have a device that plays AMV videos, please test if videos " |
| "with such heights work with it and report your findings to ffmpeg-devel@ffmpeg.org\n"); |
| return AVERROR_EXPERIMENTAL; |
| } |
| |
| pic = av_frame_clone(pic_arg); |
| if (!pic) |
| return AVERROR(ENOMEM); |
| //picture should be flipped upside-down |
| for(i=0; i < 3; i++) { |
| int vsample = i ? 2 >> chroma_v_shift : 2; |
| pic->data[i] += pic->linesize[i] * (vsample * s->height / V_MAX - 1); |
| pic->linesize[i] *= -1; |
| } |
| ret = ff_mpv_encode_picture(avctx, pkt, pic, got_packet); |
| av_frame_free(&pic); |
| return ret; |
| } |
| |
| #define OFFSET(x) offsetof(MpegEncContext, x) |
| #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM |
| static const AVOption options[] = { |
| FF_MPV_COMMON_OPTS |
| { "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 3, VE, "pred" }, |
| { "left", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "pred" }, |
| { "plane", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "pred" }, |
| { "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, "pred" }, |
| |
| { NULL}, |
| }; |
| |
| #if CONFIG_MJPEG_ENCODER |
| |
| static const AVClass mjpeg_class = { |
| .class_name = "mjpeg encoder", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| AVCodec ff_mjpeg_encoder = { |
| .name = "mjpeg", |
| .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_MJPEG, |
| .priv_data_size = sizeof(MpegEncContext), |
| .init = ff_mpv_encode_init, |
| .encode2 = ff_mpv_encode_picture, |
| .close = ff_mpv_encode_end, |
| .capabilities = AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_INTRA_ONLY, |
| .pix_fmts = (const enum AVPixelFormat[]){ |
| AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE |
| }, |
| .priv_class = &mjpeg_class, |
| }; |
| #endif |
| #if CONFIG_AMV_ENCODER |
| static const AVClass amv_class = { |
| .class_name = "amv encoder", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| AVCodec ff_amv_encoder = { |
| .name = "amv", |
| .long_name = NULL_IF_CONFIG_SMALL("AMV Video"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_AMV, |
| .priv_data_size = sizeof(MpegEncContext), |
| .init = ff_mpv_encode_init, |
| .encode2 = amv_encode_picture, |
| .close = ff_mpv_encode_end, |
| .pix_fmts = (const enum AVPixelFormat[]){ |
| AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_NONE |
| }, |
| .priv_class = &amv_class, |
| }; |
| #endif |
