451 lines
15 KiB
C
451 lines
15 KiB
C
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/*
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* MJPEG encoder
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* Copyright (c) 2000, 2001 Fabrice Bellard
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* Copyright (c) 2003 Alex Beregszaszi
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* Copyright (c) 2003-2004 Michael Niedermayer
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*
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* Support for external huffman table, various fixes (AVID workaround),
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* aspecting, new decode_frame mechanism and apple mjpeg-b support
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* by Alex Beregszaszi
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* MJPEG encoder.
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*/
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#include "libavutil/pixdesc.h"
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#include "avcodec.h"
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#include "jpegtables.h"
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#include "mjpegenc_common.h"
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#include "mpegvideo.h"
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#include "mjpeg.h"
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#include "mjpegenc.h"
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#include "profiles.h"
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static int alloc_huffman(MpegEncContext *s)
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{
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MJpegContext *m = s->mjpeg_ctx;
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size_t num_mbs, num_blocks, num_codes;
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int blocks_per_mb;
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// We need to init this here as the mjpeg init is called before the common init,
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s->mb_width = (s->width + 15) / 16;
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s->mb_height = (s->height + 15) / 16;
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switch (s->chroma_format) {
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case CHROMA_420: blocks_per_mb = 6; break;
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case CHROMA_422: blocks_per_mb = 8; break;
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case CHROMA_444: blocks_per_mb = 12; break;
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default: av_assert0(0);
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};
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// Make sure we have enough space to hold this frame.
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num_mbs = s->mb_width * s->mb_height;
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num_blocks = num_mbs * blocks_per_mb;
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num_codes = num_blocks * 64;
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m->huff_buffer = av_malloc_array(num_codes, sizeof(MJpegHuffmanCode));
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if (!m->huff_buffer)
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return AVERROR(ENOMEM);
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return 0;
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}
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av_cold int ff_mjpeg_encode_init(MpegEncContext *s)
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{
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MJpegContext *m;
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av_assert0(s->slice_context_count == 1);
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if (s->width > 65500 || s->height > 65500) {
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av_log(s, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n");
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return AVERROR(EINVAL);
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}
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m = av_mallocz(sizeof(MJpegContext));
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if (!m)
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return AVERROR(ENOMEM);
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s->min_qcoeff=-1023;
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s->max_qcoeff= 1023;
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// Build default Huffman tables.
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// These may be overwritten later with more optimal Huffman tables, but
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// they are needed at least right now for some processes like trellis.
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ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance,
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m->huff_code_dc_luminance,
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avpriv_mjpeg_bits_dc_luminance,
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avpriv_mjpeg_val_dc);
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ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance,
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m->huff_code_dc_chrominance,
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avpriv_mjpeg_bits_dc_chrominance,
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avpriv_mjpeg_val_dc);
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ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance,
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m->huff_code_ac_luminance,
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avpriv_mjpeg_bits_ac_luminance,
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avpriv_mjpeg_val_ac_luminance);
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ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance,
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m->huff_code_ac_chrominance,
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avpriv_mjpeg_bits_ac_chrominance,
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avpriv_mjpeg_val_ac_chrominance);
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ff_init_uni_ac_vlc(m->huff_size_ac_luminance, m->uni_ac_vlc_len);
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ff_init_uni_ac_vlc(m->huff_size_ac_chrominance, m->uni_chroma_ac_vlc_len);
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s->intra_ac_vlc_length =
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s->intra_ac_vlc_last_length = m->uni_ac_vlc_len;
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s->intra_chroma_ac_vlc_length =
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s->intra_chroma_ac_vlc_last_length = m->uni_chroma_ac_vlc_len;
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// Buffers start out empty.
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m->huff_ncode = 0;
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s->mjpeg_ctx = m;
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if(s->huffman == HUFFMAN_TABLE_OPTIMAL)
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return alloc_huffman(s);
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return 0;
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}
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av_cold void ff_mjpeg_encode_close(MpegEncContext *s)
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{
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av_freep(&s->mjpeg_ctx->huff_buffer);
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av_freep(&s->mjpeg_ctx);
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}
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/**
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* Add code and table_id to the JPEG buffer.
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*
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* @param s The MJpegContext which contains the JPEG buffer.
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* @param table_id Which Huffman table the code belongs to.
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* @param code The encoded exponent of the coefficients and the run-bits.
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*/
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static inline void ff_mjpeg_encode_code(MJpegContext *s, uint8_t table_id, int code)
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{
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MJpegHuffmanCode *c = &s->huff_buffer[s->huff_ncode++];
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c->table_id = table_id;
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c->code = code;
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}
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/**
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* Add the coefficient's data to the JPEG buffer.
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*
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* @param s The MJpegContext which contains the JPEG buffer.
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* @param table_id Which Huffman table the code belongs to.
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* @param val The coefficient.
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* @param run The run-bits.
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*/
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static void ff_mjpeg_encode_coef(MJpegContext *s, uint8_t table_id, int val, int run)
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{
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int mant, code;
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if (val == 0) {
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av_assert0(run == 0);
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ff_mjpeg_encode_code(s, table_id, 0);
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} else {
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mant = val;
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if (val < 0) {
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val = -val;
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mant--;
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}
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code = (run << 4) | (av_log2_16bit(val) + 1);
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s->huff_buffer[s->huff_ncode].mant = mant;
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ff_mjpeg_encode_code(s, table_id, code);
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}
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}
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/**
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* Add the block's data into the JPEG buffer.
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*
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* @param s The MJpegEncContext that contains the JPEG buffer.
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* @param block The block.
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* @param n The block's index or number.
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*/
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static void record_block(MpegEncContext *s, int16_t *block, int n)
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{
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int i, j, table_id;
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int component, dc, last_index, val, run;
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MJpegContext *m = s->mjpeg_ctx;
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/* DC coef */
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component = (n <= 3 ? 0 : (n&1) + 1);
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table_id = (n <= 3 ? 0 : 1);
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dc = block[0]; /* overflow is impossible */
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val = dc - s->last_dc[component];
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ff_mjpeg_encode_coef(m, table_id, val, 0);
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s->last_dc[component] = dc;
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/* AC coefs */
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run = 0;
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last_index = s->block_last_index[n];
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table_id |= 2;
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for(i=1;i<=last_index;i++) {
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j = s->intra_scantable.permutated[i];
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val = block[j];
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if (val == 0) {
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run++;
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} else {
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while (run >= 16) {
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ff_mjpeg_encode_code(m, table_id, 0xf0);
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run -= 16;
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}
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ff_mjpeg_encode_coef(m, table_id, val, run);
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run = 0;
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}
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}
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/* output EOB only if not already 64 values */
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if (last_index < 63 || run != 0)
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ff_mjpeg_encode_code(m, table_id, 0);
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}
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static void encode_block(MpegEncContext *s, int16_t *block, int n)
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{
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int mant, nbits, code, i, j;
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int component, dc, run, last_index, val;
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MJpegContext *m = s->mjpeg_ctx;
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uint8_t *huff_size_ac;
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uint16_t *huff_code_ac;
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/* DC coef */
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component = (n <= 3 ? 0 : (n&1) + 1);
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dc = block[0]; /* overflow is impossible */
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val = dc - s->last_dc[component];
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if (n < 4) {
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ff_mjpeg_encode_dc(&s->pb, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
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huff_size_ac = m->huff_size_ac_luminance;
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huff_code_ac = m->huff_code_ac_luminance;
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} else {
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ff_mjpeg_encode_dc(&s->pb, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
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huff_size_ac = m->huff_size_ac_chrominance;
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huff_code_ac = m->huff_code_ac_chrominance;
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}
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s->last_dc[component] = dc;
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/* AC coefs */
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run = 0;
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last_index = s->block_last_index[n];
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for(i=1;i<=last_index;i++) {
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j = s->intra_scantable.permutated[i];
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val = block[j];
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if (val == 0) {
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run++;
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} else {
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while (run >= 16) {
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put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
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run -= 16;
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}
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mant = val;
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if (val < 0) {
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val = -val;
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mant--;
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}
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nbits= av_log2_16bit(val) + 1;
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code = (run << 4) | nbits;
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put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
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put_sbits(&s->pb, nbits, mant);
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run = 0;
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}
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}
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/* output EOB only if not already 64 values */
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if (last_index < 63 || run != 0)
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put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
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}
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void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64])
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{
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int i;
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if (s->huffman == HUFFMAN_TABLE_OPTIMAL) {
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if (s->chroma_format == CHROMA_444) {
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record_block(s, block[0], 0);
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record_block(s, block[2], 2);
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record_block(s, block[4], 4);
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record_block(s, block[8], 8);
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record_block(s, block[5], 5);
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record_block(s, block[9], 9);
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if (16*s->mb_x+8 < s->width) {
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record_block(s, block[1], 1);
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record_block(s, block[3], 3);
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record_block(s, block[6], 6);
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record_block(s, block[10], 10);
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record_block(s, block[7], 7);
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record_block(s, block[11], 11);
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}
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} else {
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for(i=0;i<5;i++) {
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record_block(s, block[i], i);
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}
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if (s->chroma_format == CHROMA_420) {
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record_block(s, block[5], 5);
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} else {
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record_block(s, block[6], 6);
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record_block(s, block[5], 5);
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record_block(s, block[7], 7);
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}
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}
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} else {
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if (s->chroma_format == CHROMA_444) {
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encode_block(s, block[0], 0);
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encode_block(s, block[2], 2);
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encode_block(s, block[4], 4);
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encode_block(s, block[8], 8);
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encode_block(s, block[5], 5);
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encode_block(s, block[9], 9);
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if (16*s->mb_x+8 < s->width) {
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encode_block(s, block[1], 1);
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encode_block(s, block[3], 3);
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encode_block(s, block[6], 6);
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encode_block(s, block[10], 10);
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encode_block(s, block[7], 7);
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encode_block(s, block[11], 11);
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}
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} else {
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for(i=0;i<5;i++) {
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encode_block(s, block[i], i);
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}
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if (s->chroma_format == CHROMA_420) {
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encode_block(s, block[5], 5);
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} else {
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encode_block(s, block[6], 6);
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encode_block(s, block[5], 5);
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encode_block(s, block[7], 7);
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}
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}
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s->i_tex_bits += get_bits_diff(s);
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}
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}
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#if CONFIG_AMV_ENCODER
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// maximum over s->mjpeg_vsample[i]
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#define V_MAX 2
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static int amv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *pic_arg, int *got_packet)
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{
|
||
|
|
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 ((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;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#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" },
|
||
|
|
{ "huffman", "Huffman table strategy", OFFSET(huffman), AV_OPT_TYPE_INT, { .i64 = HUFFMAN_TABLE_OPTIMAL }, 0, NB_HUFFMAN_TABLE_OPTION - 1, VE, "huffman" },
|
||
|
|
{ "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_DEFAULT }, INT_MIN, INT_MAX, VE, "huffman" },
|
||
|
|
{ "optimal", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_OPTIMAL }, INT_MIN, INT_MAX, VE, "huffman" },
|
||
|
|
{ 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,
|
||
|
|
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
|
||
|
|
.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,
|
||
|
|
.profiles = NULL_IF_CONFIG_SMALL(ff_mjpeg_profiles),
|
||
|
|
};
|
||
|
|
#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,
|
||
|
|
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
|
||
|
|
.pix_fmts = (const enum AVPixelFormat[]) {
|
||
|
|
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_NONE
|
||
|
|
},
|
||
|
|
.priv_class = &amv_class,
|
||
|
|
};
|
||
|
|
#endif
|