| /* |
| * MidiVid MV30 decoder |
| * |
| * Copyright (c) 2020 Paul B Mahol |
| * |
| * 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 |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "libavutil/thread.h" |
| |
| #include "avcodec.h" |
| #include "bytestream.h" |
| #include "copy_block.h" |
| #include "mathops.h" |
| #include "blockdsp.h" |
| #include "get_bits.h" |
| #include "internal.h" |
| #include "aandcttab.h" |
| |
| typedef struct MV30Context { |
| GetBitContext gb; |
| |
| int intra_quant; |
| int inter_quant; |
| int is_inter; |
| int mode_size; |
| int nb_mvectors; |
| |
| int block[6][64]; |
| int16_t *mvectors; |
| unsigned int mvectors_size; |
| int16_t *coeffs; |
| unsigned int coeffs_size; |
| |
| int16_t intraq_tab[2][64]; |
| int16_t interq_tab[2][64]; |
| |
| BlockDSPContext bdsp; |
| AVFrame *prev_frame; |
| } MV30Context; |
| |
| static VLC cbp_tab; |
| |
| static const uint8_t luma_tab[] = { |
| 12, 12, 15, 19, 25, 34, 40, 48, |
| 12, 12, 18, 22, 27, 44, 47, 46, |
| 17, 18, 21, 26, 35, 46, 52, 47, |
| 18, 20, 24, 28, 40, 61, 59, 51, |
| 20, 24, 32, 43, 50, 72, 72, 63, |
| 25, 31, 42, 48, 58, 72, 81, 75, |
| 38, 46, 54, 61, 71, 84, 88, 85, |
| 50, 61, 65, 68, 79, 78, 86, 91, |
| }; |
| |
| static const uint8_t chroma_tab[] = { |
| 12, 16, 24, 47, 99, 99, 99, 99, |
| 16, 21, 26, 66, 99, 99, 99, 99, |
| 24, 26, 56, 99, 99, 99, 99, 99, |
| 47, 66, 99, 99, 99, 99, 99, 99, |
| 99, 99, 99, 99, 99, 99, 99, 99, |
| 99, 99, 99, 99, 99, 99, 99, 99, |
| 99, 99, 99, 99, 99, 99, 99, 99, |
| 99, 99, 99, 99, 99, 99, 99, 99, |
| }; |
| |
| static const uint8_t zigzag[] = { |
| 0, 1, 8, 9, 16, 2, 3, 10, |
| 17, 24, 32, 25, 18, 11, 4, 5, |
| 12, 19, 26, 33, 40, 48, 41, 34, |
| 27, 20, 13, 6, 7, 14, 21, 28, |
| 35, 42, 49, 56, 57, 50, 43, 36, |
| 29, 22, 15, 23, 30, 37, 44, 51, |
| 58, 59, 52, 45, 38, 31, 39, 46, |
| 53, 60, 61, 54, 47, 55, 62, 63, |
| }; |
| |
| static void get_qtable(int16_t *table, int quant, const uint8_t *quant_tab) |
| { |
| int factor = quant < 50 ? 5000 / FFMAX(quant, 1) : 200 - FFMIN(quant, 100) * 2; |
| |
| for (int i = 0; i < 64; i++) { |
| table[i] = av_clip((quant_tab[i] * factor + 0x32) / 100, 1, 0x7fff); |
| table[i] = ((int)ff_aanscales[i] * (int)table[i] + 0x800) >> 12; |
| } |
| } |
| |
| static inline void idct_1d(int *blk, int step) |
| { |
| const int t0 = blk[0 * step] + blk[4 * step]; |
| const int t1 = blk[0 * step] - blk[4 * step]; |
| const int t2 = blk[2 * step] + blk[6 * step]; |
| const int t3 = (((blk[2 * step] - blk[6 * step]) * 362) >> 8) - t2; |
| const int t4 = t0 + t2; |
| const int t5 = t0 - t2; |
| const int t6 = t1 + t3; |
| const int t7 = t1 - t3; |
| const int t8 = blk[5 * step] + blk[3 * step]; |
| const int t9 = blk[5 * step] - blk[3 * step]; |
| const int tA = blk[1 * step] + blk[7 * step]; |
| const int tB = blk[1 * step] - blk[7 * step]; |
| const int tC = t8 + tA; |
| const int tD = (tB + t9) * 473 >> 8; |
| const int tE = ((t9 * -669 >> 8) - tC) + tD; |
| const int tF = ((tA - t8) * 362 >> 8) - tE; |
| const int t10 = ((tB * 277 >> 8) - tD) + tF; |
| |
| blk[0 * step] = t4 + tC; |
| blk[1 * step] = t6 + tE; |
| blk[2 * step] = t7 + tF; |
| blk[3 * step] = t5 - t10; |
| blk[4 * step] = t5 + t10; |
| blk[5 * step] = t7 - tF; |
| blk[6 * step] = t6 - tE; |
| blk[7 * step] = t4 - tC; |
| } |
| |
| static void idct_put(uint8_t *dst, int stride, int *block) |
| { |
| for (int i = 0; i < 8; i++) { |
| if ((block[0x08 + i] | |
| block[0x10 + i] | |
| block[0x18 + i] | |
| block[0x20 + i] | |
| block[0x28 + i] | |
| block[0x30 + i] | |
| block[0x38 + i]) == 0) { |
| block[0x08 + i] = block[i]; |
| block[0x10 + i] = block[i]; |
| block[0x18 + i] = block[i]; |
| block[0x20 + i] = block[i]; |
| block[0x28 + i] = block[i]; |
| block[0x30 + i] = block[i]; |
| block[0x38 + i] = block[i]; |
| } else { |
| idct_1d(block + i, 8); |
| } |
| } |
| |
| for (int i = 0; i < 8; i++) { |
| idct_1d(block, 1); |
| for (int j = 0; j < 8; j++) |
| dst[j] = av_clip_uint8((block[j] >> 5) + 128); |
| block += 8; |
| dst += stride; |
| } |
| } |
| |
| static void idct_add(uint8_t *dst, int stride, |
| const uint8_t *src, int in_linesize, int *block) |
| { |
| for (int i = 0; i < 8; i++) { |
| if ((block[0x08 + i] | |
| block[0x10 + i] | |
| block[0x18 + i] | |
| block[0x20 + i] | |
| block[0x28 + i] | |
| block[0x30 + i] | |
| block[0x38 + i]) == 0) { |
| block[0x08 + i] = block[i]; |
| block[0x10 + i] = block[i]; |
| block[0x18 + i] = block[i]; |
| block[0x20 + i] = block[i]; |
| block[0x28 + i] = block[i]; |
| block[0x30 + i] = block[i]; |
| block[0x38 + i] = block[i]; |
| } else { |
| idct_1d(block + i, 8); |
| } |
| } |
| |
| for (int i = 0; i < 8; i++) { |
| idct_1d(block, 1); |
| for (int j = 0; j < 8; j++) |
| dst[j] = av_clip_uint8((block[j] >> 5) + src[j]); |
| block += 8; |
| dst += stride; |
| src += in_linesize; |
| } |
| } |
| |
| static inline void idct2_1d(int *blk, int step) |
| { |
| const int t0 = blk[0 * step]; |
| const int t1 = blk[1 * step]; |
| const int t2 = t1 * 473 >> 8; |
| const int t3 = t2 - t1; |
| const int t4 = (t1 * 362 >> 8) - t3; |
| const int t5 = ((t1 * 277 >> 8) - t2) + t4; |
| |
| blk[0 * step] = t1 + t0; |
| blk[1 * step] = t0 + t3; |
| blk[2 * step] = t4 + t0; |
| blk[3 * step] = t0 - t5; |
| blk[4 * step] = t5 + t0; |
| blk[5 * step] = t0 - t4; |
| blk[6 * step] = t0 - t3; |
| blk[7 * step] = t0 - t1; |
| } |
| |
| static void idct2_put(uint8_t *dst, int stride, int *block) |
| { |
| for (int i = 0; i < 2; i++) { |
| if ((block[0x08 + i]) == 0) { |
| block[0x08 + i] = block[i]; |
| block[0x10 + i] = block[i]; |
| block[0x18 + i] = block[i]; |
| block[0x20 + i] = block[i]; |
| block[0x28 + i] = block[i]; |
| block[0x30 + i] = block[i]; |
| block[0x38 + i] = block[i]; |
| } else { |
| idct2_1d(block + i, 8); |
| } |
| } |
| |
| for (int i = 0; i < 8; i++) { |
| if (block[1] == 0) { |
| for (int j = 0; j < 8; j++) |
| dst[j] = av_clip_uint8((block[0] >> 5) + 128); |
| } else { |
| idct2_1d(block, 1); |
| for (int j = 0; j < 8; j++) |
| dst[j] = av_clip_uint8((block[j] >> 5) + 128); |
| } |
| block += 8; |
| dst += stride; |
| } |
| } |
| |
| static void idct2_add(uint8_t *dst, int stride, |
| const uint8_t *src, int in_linesize, |
| int *block) |
| { |
| for (int i = 0; i < 2; i++) { |
| if ((block[0x08 + i]) == 0) { |
| block[0x08 + i] = block[i]; |
| block[0x10 + i] = block[i]; |
| block[0x18 + i] = block[i]; |
| block[0x20 + i] = block[i]; |
| block[0x28 + i] = block[i]; |
| block[0x30 + i] = block[i]; |
| block[0x38 + i] = block[i]; |
| } else { |
| idct2_1d(block + i, 8); |
| } |
| } |
| |
| for (int i = 0; i < 8; i++) { |
| if (block[1] == 0) { |
| for (int j = 0; j < 8; j++) |
| dst[j] = av_clip_uint8((block[0] >> 5) + src[j]); |
| } else { |
| idct2_1d(block, 1); |
| for (int j = 0; j < 8; j++) |
| dst[j] = av_clip_uint8((block[j] >> 5) + src[j]); |
| } |
| block += 8; |
| dst += stride; |
| src += in_linesize; |
| } |
| } |
| |
| static void update_inter_block(uint8_t *dst, int stride, |
| const uint8_t *src, int in_linesize, |
| int block) |
| { |
| for (int i = 0; i < 8; i++) { |
| for (int j = 0; j < 8; j++) |
| dst[j] = av_clip_uint8(block + src[j]); |
| dst += stride; |
| src += in_linesize; |
| } |
| } |
| |
| static int decode_intra_block(AVCodecContext *avctx, int mode, |
| GetByteContext *gbyte, int16_t *qtab, |
| int *block, int *pfill, |
| uint8_t *dst, int linesize) |
| { |
| MV30Context *s = avctx->priv_data; |
| int fill; |
| |
| switch (mode) { |
| case 0: |
| s->bdsp.fill_block_tab[1](dst, 128, linesize, 8); |
| break; |
| case 1: |
| fill = sign_extend(bytestream2_get_ne16(gbyte), 16); |
| pfill[0] += fill; |
| block[0] = ((pfill[0] * qtab[0]) >> 5) + 128; |
| s->bdsp.fill_block_tab[1](dst, block[0], linesize, 8); |
| break; |
| case 2: |
| memset(block, 0, sizeof(*block) * 64); |
| fill = sign_extend(bytestream2_get_ne16(gbyte), 16); |
| pfill[0] += fill; |
| block[0] = pfill[0] * qtab[0]; |
| block[1] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[1]; |
| block[8] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[8]; |
| block[9] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[9]; |
| idct2_put(dst, linesize, block); |
| break; |
| case 3: |
| fill = sign_extend(bytestream2_get_ne16(gbyte), 16); |
| pfill[0] += fill; |
| block[0] = pfill[0] * qtab[0]; |
| for (int i = 1; i < 64; i++) |
| block[zigzag[i]] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[zigzag[i]]; |
| idct_put(dst, linesize, block); |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int decode_inter_block(AVCodecContext *avctx, int mode, |
| GetByteContext *gbyte, int16_t *qtab, |
| int *block, int *pfill, |
| uint8_t *dst, int linesize, |
| const uint8_t *src, int in_linesize) |
| { |
| int fill; |
| |
| switch (mode) { |
| case 0: |
| copy_block8(dst, src, linesize, in_linesize, 8); |
| break; |
| case 1: |
| fill = sign_extend(bytestream2_get_ne16(gbyte), 16); |
| pfill[0] += fill; |
| block[0] = (pfill[0] * qtab[0]) >> 5; |
| update_inter_block(dst, linesize, src, in_linesize, block[0]); |
| break; |
| case 2: |
| memset(block, 0, sizeof(*block) * 64); |
| fill = sign_extend(bytestream2_get_ne16(gbyte), 16); |
| pfill[0] += fill; |
| block[0] = pfill[0] * qtab[0]; |
| block[1] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[1]; |
| block[8] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[8]; |
| block[9] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[9]; |
| idct2_add(dst, linesize, src, in_linesize, block); |
| break; |
| case 3: |
| fill = sign_extend(bytestream2_get_ne16(gbyte), 16); |
| pfill[0] += fill; |
| block[0] = pfill[0] * qtab[0]; |
| for (int i = 1; i < 64; i++) |
| block[zigzag[i]] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[zigzag[i]]; |
| idct_add(dst, linesize, src, in_linesize, block); |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int decode_coeffs(GetBitContext *gb, int16_t *coeffs, int nb_codes) |
| { |
| memset(coeffs, 0, nb_codes * sizeof(*coeffs)); |
| |
| for (int i = 0; i < nb_codes;) { |
| int value = get_vlc2(gb, cbp_tab.table, cbp_tab.bits, 1); |
| |
| if (value < 0) |
| return AVERROR_INVALIDDATA; |
| |
| if (value > 0) { |
| int x = get_bits(gb, value); |
| |
| if (x < (1 << value) / 2) { |
| x = (1 << (value - 1)) + (x & ((1 << value) - 1 >> 1)); |
| } else { |
| x = -(1 << (value - 1)) - (x & ((1 << value) - 1 >> 1)); |
| } |
| coeffs[i++] = x; |
| } else { |
| int flag = get_bits1(gb); |
| |
| i += get_bits(gb, 3 + flag * 3) + 1 + flag * 8; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int decode_intra(AVCodecContext *avctx, GetBitContext *gb, AVFrame *frame) |
| { |
| MV30Context *s = avctx->priv_data; |
| GetBitContext mgb; |
| uint8_t *dst[6]; |
| int linesize[6]; |
| int ret; |
| |
| mgb = *gb; |
| skip_bits_long(gb, s->mode_size * 8); |
| |
| linesize[0] = frame->linesize[0]; |
| linesize[1] = frame->linesize[0]; |
| linesize[2] = frame->linesize[0]; |
| linesize[3] = frame->linesize[0]; |
| linesize[4] = frame->linesize[1]; |
| linesize[5] = frame->linesize[2]; |
| |
| for (int y = 0; y < avctx->height; y += 16) { |
| GetByteContext gbyte; |
| int pfill[3][1] = { 0 }; |
| int nb_codes = get_bits(gb, 16); |
| |
| av_fast_padded_malloc(&s->coeffs, &s->coeffs_size, nb_codes * sizeof(*s->coeffs)); |
| if (!s->coeffs) |
| return AVERROR(ENOMEM); |
| ret = decode_coeffs(gb, s->coeffs, nb_codes); |
| if (ret < 0) |
| return ret; |
| |
| bytestream2_init(&gbyte, (uint8_t *)s->coeffs, nb_codes * sizeof(*s->coeffs)); |
| |
| for (int x = 0; x < avctx->width; x += 16) { |
| dst[0] = frame->data[0] + linesize[0] * y + x; |
| dst[1] = frame->data[0] + linesize[0] * y + x + 8; |
| dst[2] = frame->data[0] + linesize[0] * (y + 8) + x; |
| dst[3] = frame->data[0] + linesize[0] * (y + 8) + x + 8; |
| dst[4] = frame->data[1] + linesize[4] * (y >> 1) + (x >> 1); |
| dst[5] = frame->data[2] + linesize[5] * (y >> 1) + (x >> 1); |
| |
| for (int b = 0; b < 6; b++) { |
| int mode = get_bits_le(&mgb, 2); |
| |
| ret = decode_intra_block(avctx, mode, &gbyte, s->intraq_tab[b >= 4], |
| s->block[b], |
| pfill[(b >= 4) + (b >= 5)], |
| dst[b], linesize[b]); |
| if (ret < 0) |
| return ret; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int decode_inter(AVCodecContext *avctx, GetBitContext *gb, |
| AVFrame *frame, AVFrame *prev) |
| { |
| MV30Context *s = avctx->priv_data; |
| GetBitContext mask; |
| GetBitContext mgb; |
| GetByteContext mv; |
| const int mask_size = ((avctx->height >> 4) * (avctx->width >> 4) * 2 + 7) / 8; |
| uint8_t *dst[6], *src[6]; |
| int in_linesize[6]; |
| int linesize[6]; |
| int ret, cnt = 0; |
| int flags = 0; |
| |
| in_linesize[0] = prev->linesize[0]; |
| in_linesize[1] = prev->linesize[0]; |
| in_linesize[2] = prev->linesize[0]; |
| in_linesize[3] = prev->linesize[0]; |
| in_linesize[4] = prev->linesize[1]; |
| in_linesize[5] = prev->linesize[2]; |
| |
| linesize[0] = frame->linesize[0]; |
| linesize[1] = frame->linesize[0]; |
| linesize[2] = frame->linesize[0]; |
| linesize[3] = frame->linesize[0]; |
| linesize[4] = frame->linesize[1]; |
| linesize[5] = frame->linesize[2]; |
| |
| av_fast_padded_malloc(&s->mvectors, &s->mvectors_size, 2 * s->nb_mvectors * sizeof(*s->mvectors)); |
| if (!s->mvectors) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| |
| mask = *gb; |
| skip_bits_long(gb, mask_size * 8); |
| mgb = *gb; |
| skip_bits_long(gb, s->mode_size * 8); |
| |
| ret = decode_coeffs(gb, s->mvectors, 2 * s->nb_mvectors); |
| if (ret < 0) |
| goto fail; |
| |
| bytestream2_init(&mv, (uint8_t *)s->mvectors, 2 * s->nb_mvectors * sizeof(*s->mvectors)); |
| |
| for (int y = 0; y < avctx->height; y += 16) { |
| GetByteContext gbyte; |
| int pfill[3][1] = { 0 }; |
| int nb_codes = get_bits(gb, 16); |
| |
| skip_bits(gb, 8); |
| if (get_bits_left(gb) < 0) { |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| |
| av_fast_padded_malloc(&s->coeffs, &s->coeffs_size, nb_codes * sizeof(*s->coeffs)); |
| if (!s->coeffs) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| |
| ret = decode_coeffs(gb, s->coeffs, nb_codes); |
| if (ret < 0) |
| goto fail; |
| |
| bytestream2_init(&gbyte, (uint8_t *)s->coeffs, nb_codes * sizeof(*s->coeffs)); |
| |
| for (int x = 0; x < avctx->width; x += 16) { |
| if (cnt >= 4) |
| cnt = 0; |
| if (cnt == 0) |
| flags = get_bits(&mask, 8); |
| |
| dst[0] = frame->data[0] + linesize[0] * y + x; |
| dst[1] = frame->data[0] + linesize[0] * y + x + 8; |
| dst[2] = frame->data[0] + linesize[0] * (y + 8) + x; |
| dst[3] = frame->data[0] + linesize[0] * (y + 8) + x + 8; |
| dst[4] = frame->data[1] + linesize[4] * (y >> 1) + (x >> 1); |
| dst[5] = frame->data[2] + linesize[5] * (y >> 1) + (x >> 1); |
| |
| if ((flags >> (cnt)) & 1) { |
| int mv_x = sign_extend(bytestream2_get_ne16(&mv), 16); |
| int mv_y = sign_extend(bytestream2_get_ne16(&mv), 16); |
| |
| int px = x + mv_x; |
| int py = y + mv_y; |
| |
| if (px < 0 || px >= avctx->width || |
| py < 0 || py >= avctx->height) |
| return AVERROR_INVALIDDATA; |
| |
| src[0] = prev->data[0] + in_linesize[0] * py + px; |
| src[1] = prev->data[0] + in_linesize[0] * py + px + 8; |
| src[2] = prev->data[0] + in_linesize[0] * (py + 8) + px; |
| src[3] = prev->data[0] + in_linesize[0] * (py + 8) + px + 8; |
| src[4] = prev->data[1] + in_linesize[4] * (py >> 1) + (px >> 1); |
| src[5] = prev->data[2] + in_linesize[5] * (py >> 1) + (px >> 1); |
| |
| if ((flags >> (cnt + 4)) & 1) { |
| for (int b = 0; b < 6; b++) |
| copy_block8(dst[b], src[b], linesize[b], in_linesize[b], 8); |
| } else { |
| for (int b = 0; b < 6; b++) { |
| int mode = get_bits_le(&mgb, 2); |
| |
| ret = decode_inter_block(avctx, mode, &gbyte, s->interq_tab[b >= 4], |
| s->block[b], |
| pfill[(b >= 4) + (b >= 5)], |
| dst[b], linesize[b], |
| src[b], in_linesize[b]); |
| if (ret < 0) |
| goto fail; |
| } |
| } |
| } else { |
| for (int b = 0; b < 6; b++) { |
| int mode = get_bits_le(&mgb, 2); |
| |
| ret = decode_intra_block(avctx, mode, &gbyte, s->intraq_tab[b >= 4], |
| s->block[b], |
| pfill[(b >= 4) + (b >= 5)], |
| dst[b], linesize[b]); |
| if (ret < 0) |
| goto fail; |
| } |
| } |
| |
| cnt++; |
| } |
| } |
| |
| fail: |
| return ret; |
| } |
| |
| static int decode_frame(AVCodecContext *avctx, void *data, |
| int *got_frame, AVPacket *avpkt) |
| { |
| MV30Context *s = avctx->priv_data; |
| GetBitContext *gb = &s->gb; |
| AVFrame *frame = data; |
| int ret; |
| |
| if ((ret = init_get_bits8(gb, avpkt->data, avpkt->size)) < 0) |
| return ret; |
| |
| if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0) |
| return ret; |
| |
| s->intra_quant = get_bits(gb, 8); |
| s->inter_quant = s->intra_quant + get_sbits(gb, 8); |
| s->is_inter = get_bits_le(gb, 16); |
| s->mode_size = get_bits_le(gb, 16); |
| if (s->is_inter) |
| s->nb_mvectors = get_bits_le(gb, 16); |
| |
| get_qtable(s->intraq_tab[0], s->intra_quant, luma_tab); |
| get_qtable(s->intraq_tab[1], s->intra_quant, chroma_tab); |
| |
| frame->key_frame = s->is_inter == 0; |
| |
| if (frame->key_frame) { |
| ret = decode_intra(avctx, gb, frame); |
| if (ret < 0) |
| return ret; |
| } else { |
| get_qtable(s->interq_tab[0], s->inter_quant, luma_tab); |
| get_qtable(s->interq_tab[1], s->inter_quant, chroma_tab); |
| |
| if (!s->prev_frame->data[0]) { |
| av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| ret = decode_inter(avctx, gb, frame, s->prev_frame); |
| if (ret < 0) |
| return ret; |
| } |
| |
| av_frame_unref(s->prev_frame); |
| if ((ret = av_frame_ref(s->prev_frame, frame)) < 0) |
| return ret; |
| |
| *got_frame = 1; |
| |
| return avpkt->size; |
| } |
| |
| static const uint16_t cbp_codes[] = { |
| 0, 1, 4, 5, 6, 0xE, 0x1E, 0x3E, 0x7E, 0xFE, 0x1FE, 0x1FF, |
| }; |
| |
| static const uint8_t cbp_bits[] = { |
| 2, 2, 3, 3, 3, 4, 5, 6, 7, 8, 9, 9, |
| }; |
| |
| static av_cold void init_static_data(void) |
| { |
| INIT_VLC_SPARSE_STATIC(&cbp_tab, 9, FF_ARRAY_ELEMS(cbp_bits), |
| cbp_bits, 1, 1, cbp_codes, 2, 2, NULL, 0, 0, 512); |
| } |
| |
| static av_cold int decode_init(AVCodecContext *avctx) |
| { |
| MV30Context *s = avctx->priv_data; |
| static AVOnce init_static_once = AV_ONCE_INIT; |
| |
| avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
| avctx->color_range = AVCOL_RANGE_JPEG; |
| |
| ff_blockdsp_init(&s->bdsp, avctx); |
| |
| s->prev_frame = av_frame_alloc(); |
| if (!s->prev_frame) |
| return AVERROR(ENOMEM); |
| |
| ff_thread_once(&init_static_once, init_static_data); |
| |
| return 0; |
| } |
| |
| static void decode_flush(AVCodecContext *avctx) |
| { |
| MV30Context *s = avctx->priv_data; |
| |
| av_frame_unref(s->prev_frame); |
| } |
| |
| static av_cold int decode_close(AVCodecContext *avctx) |
| { |
| MV30Context *s = avctx->priv_data; |
| |
| av_frame_free(&s->prev_frame); |
| av_freep(&s->coeffs); |
| s->coeffs_size = 0; |
| av_freep(&s->mvectors); |
| s->mvectors_size = 0; |
| |
| return 0; |
| } |
| |
| AVCodec ff_mv30_decoder = { |
| .name = "mv30", |
| .long_name = NULL_IF_CONFIG_SMALL("MidiVid 3.0"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_MV30, |
| .priv_data_size = sizeof(MV30Context), |
| .init = decode_init, |
| .close = decode_close, |
| .decode = decode_frame, |
| .flush = decode_flush, |
| .capabilities = AV_CODEC_CAP_DR1, |
| .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | |
| FF_CODEC_CAP_INIT_CLEANUP, |
| }; |
