| /* |
| * Copyright (c) 2003 Michael Niedermayer |
| * |
| * 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 |
| * ASUS V1/V2 encoder. |
| */ |
| |
| #include "config_components.h" |
| |
| #include "libavutil/attributes.h" |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/mem.h" |
| #include "libavutil/mem_internal.h" |
| |
| #include "aandcttab.h" |
| #include "asv.h" |
| #include "avcodec.h" |
| #include "codec_internal.h" |
| #include "encode.h" |
| #include "fdctdsp.h" |
| #include "mpeg12data.h" |
| #include "pixblockdsp.h" |
| #include "put_bits.h" |
| |
| typedef struct ASVEncContext { |
| ASVCommonContext c; |
| |
| PutBitContext pb; |
| |
| void (*get_pixels)(int16_t *restrict block, |
| const uint8_t *pixels, |
| ptrdiff_t stride); |
| |
| PixblockDSPContext pdsp; |
| FDCTDSPContext fdsp; |
| DECLARE_ALIGNED(32, int16_t, block)[6][64]; |
| int q_intra_matrix[64]; |
| } ASVEncContext; |
| |
| enum { |
| ASV1_MAX_BLOCK_SIZE = 8 + 10 * FFMAX(2 /* skip */, 5 /* ccp */ + 4 * 11 /* level */) + 5, |
| ASV1_MAX_MB_SIZE = 6 * ASV1_MAX_BLOCK_SIZE, |
| ASV2_MAX_BLOCK_SIZE = 4 + 8 + 16 * (6 /* ccp */ + 4 * 13 /* level */), |
| ASV2_MAX_MB_SIZE = 6 * ASV2_MAX_BLOCK_SIZE, |
| MAX_MB_SIZE = (FFMAX(ASV1_MAX_MB_SIZE, ASV2_MAX_MB_SIZE) + 7) / 8 |
| }; |
| |
| static inline void asv1_put_level(PutBitContext *pb, int level) |
| { |
| unsigned int index = level + 3; |
| unsigned n, code; |
| |
| if (index <= 6) { |
| n = ff_asv_level_tab[index][1]; |
| code = ff_asv_level_tab[index][0]; |
| } else { |
| n = 3 + 8; |
| code = (0 /* Escape code */ << 8) | (level & 0xFF); |
| } |
| put_bits(pb, n, code); |
| } |
| |
| static inline void asv2_put_level(ASVEncContext *a, PutBitContext *pb, int level) |
| { |
| unsigned int index = level + 31; |
| unsigned n, code; |
| |
| if (index <= 62) { |
| n = ff_asv2_level_tab[index][1]; |
| code = ff_asv2_level_tab[index][0]; |
| } else { |
| if (level < -128 || level > 127) { |
| av_log(a->c.avctx, AV_LOG_WARNING, "Clipping level %d, increase qscale\n", level); |
| level = av_clip_int8(level); |
| } |
| n = 5 + 8; |
| code = (level & 0xFF) << 5 | /* Escape code */ 0; |
| } |
| put_bits_le(pb, n, code); |
| } |
| |
| static inline void asv1_encode_block(ASVEncContext *a, int16_t block[64]) |
| { |
| put_bits(&a->pb, 8, (block[0] + 32) >> 6); |
| block[0] = 0; |
| |
| for (unsigned i = 0, nc_bits = 0, nc_val = 0; i < 10; i++) { |
| const int index = ff_asv_scantab[4 * i]; |
| int ccp = 0; |
| |
| if ((block[index + 0] = (block[index + 0] * |
| a->q_intra_matrix[index + 0] + (1 << 15)) >> 16)) |
| ccp |= 8; |
| if ((block[index + 8] = (block[index + 8] * |
| a->q_intra_matrix[index + 8] + (1 << 15)) >> 16)) |
| ccp |= 4; |
| if ((block[index + 1] = (block[index + 1] * |
| a->q_intra_matrix[index + 1] + (1 << 15)) >> 16)) |
| ccp |= 2; |
| if ((block[index + 9] = (block[index + 9] * |
| a->q_intra_matrix[index + 9] + (1 << 15)) >> 16)) |
| ccp |= 1; |
| |
| if (ccp) { |
| put_bits(&a->pb, nc_bits + ff_asv_ccp_tab[ccp][1], |
| nc_val << ff_asv_ccp_tab[ccp][1] /* Skip */ | |
| ff_asv_ccp_tab[ccp][0]); |
| nc_bits = 0; |
| nc_val = 0; |
| |
| if (ccp & 8) |
| asv1_put_level(&a->pb, block[index + 0]); |
| if (ccp & 4) |
| asv1_put_level(&a->pb, block[index + 8]); |
| if (ccp & 2) |
| asv1_put_level(&a->pb, block[index + 1]); |
| if (ccp & 1) |
| asv1_put_level(&a->pb, block[index + 9]); |
| } else { |
| nc_bits += 2; |
| nc_val = (nc_val << 2) | 2; |
| } |
| } |
| put_bits(&a->pb, 5, 0xF); /* End of block */ |
| } |
| |
| static inline void asv2_encode_block(ASVEncContext *a, int16_t block[64]) |
| { |
| int i; |
| int count = 0; |
| |
| for (count = 63; count > 3; count--) { |
| const int index = ff_asv_scantab[count]; |
| if ((block[index] * a->q_intra_matrix[index] + (1 << 15)) >> 16) |
| break; |
| } |
| |
| count >>= 2; |
| |
| put_bits_le(&a->pb, 4 + 8, count /* 4 bits */ | |
| (/* DC */(block[0] + 32) >> 6) << 4); |
| block[0] = 0; |
| |
| for (i = 0; i <= count; i++) { |
| const int index = ff_asv_scantab[4 * i]; |
| int ccp = 0; |
| |
| if ((block[index + 0] = (block[index + 0] * |
| a->q_intra_matrix[index + 0] + (1 << 15)) >> 16)) |
| ccp |= 8; |
| if ((block[index + 8] = (block[index + 8] * |
| a->q_intra_matrix[index + 8] + (1 << 15)) >> 16)) |
| ccp |= 4; |
| if ((block[index + 1] = (block[index + 1] * |
| a->q_intra_matrix[index + 1] + (1 << 15)) >> 16)) |
| ccp |= 2; |
| if ((block[index + 9] = (block[index + 9] * |
| a->q_intra_matrix[index + 9] + (1 << 15)) >> 16)) |
| ccp |= 1; |
| |
| av_assert2(i || ccp < 8); |
| if (i) |
| put_bits_le(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]); |
| else |
| put_bits_le(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]); |
| |
| if (ccp) { |
| if (ccp & 8) |
| asv2_put_level(a, &a->pb, block[index + 0]); |
| if (ccp & 4) |
| asv2_put_level(a, &a->pb, block[index + 8]); |
| if (ccp & 2) |
| asv2_put_level(a, &a->pb, block[index + 1]); |
| if (ccp & 1) |
| asv2_put_level(a, &a->pb, block[index + 9]); |
| } |
| } |
| } |
| |
| static inline int encode_mb(ASVEncContext *a, int16_t block[6][64]) |
| { |
| int i; |
| |
| av_assert0(put_bytes_left(&a->pb, 0) >= MAX_MB_SIZE); |
| |
| if (a->c.avctx->codec_id == AV_CODEC_ID_ASV1) { |
| for (i = 0; i < 6; i++) |
| asv1_encode_block(a, block[i]); |
| } else { |
| for (i = 0; i < 6; i++) { |
| asv2_encode_block(a, block[i]); |
| } |
| } |
| return 0; |
| } |
| |
| static inline void dct_get(ASVEncContext *a, const AVFrame *frame, |
| int mb_x, int mb_y) |
| { |
| int16_t (*block)[64] = a->block; |
| int linesize = frame->linesize[0]; |
| int i; |
| |
| const uint8_t *ptr_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16; |
| const uint8_t *ptr_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8; |
| const uint8_t *ptr_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8; |
| |
| a->get_pixels(block[0], ptr_y, linesize); |
| a->get_pixels(block[1], ptr_y + 8, linesize); |
| a->get_pixels(block[2], ptr_y + 8 * linesize, linesize); |
| a->get_pixels(block[3], ptr_y + 8 * linesize + 8, linesize); |
| for (i = 0; i < 4; i++) |
| a->fdsp.fdct(block[i]); |
| |
| if (!(a->c.avctx->flags & AV_CODEC_FLAG_GRAY)) { |
| a->get_pixels(block[4], ptr_cb, frame->linesize[1]); |
| a->get_pixels(block[5], ptr_cr, frame->linesize[2]); |
| for (i = 4; i < 6; i++) |
| a->fdsp.fdct(block[i]); |
| } |
| } |
| |
| static void handle_partial_mb(ASVEncContext *a, const uint8_t *const data[3], |
| const int linesizes[3], |
| int valid_width, int valid_height) |
| { |
| const int nb_blocks = a->c.avctx->flags & AV_CODEC_FLAG_GRAY ? 4 : 6; |
| static const struct Descriptor { |
| uint8_t x_offset, y_offset; |
| uint8_t component, subsampling; |
| } block_descriptor[] = { |
| { 0, 0, 0, 0 }, { 8, 0, 0, 0 }, { 0, 8, 0, 0 }, { 8, 8, 0, 0 }, |
| { 0, 0, 1, 1 }, { 0, 0, 2, 1 }, |
| }; |
| |
| for (int i = 0; i < nb_blocks; ++i) { |
| const struct Descriptor *const desc = block_descriptor + i; |
| int width_avail = AV_CEIL_RSHIFT(valid_width, desc->subsampling) - desc->x_offset; |
| int height_avail = AV_CEIL_RSHIFT(valid_height, desc->subsampling) - desc->y_offset; |
| |
| if (width_avail <= 0 || height_avail <= 0) { |
| // This block is outside of the visible part; don't replicate pixels, |
| // just zero the block, so that only the dc value will be coded. |
| memset(a->block[i], 0, sizeof(a->block[i])); |
| continue; |
| } |
| width_avail = FFMIN(width_avail, 8); |
| height_avail = FFMIN(height_avail, 8); |
| |
| ptrdiff_t linesize = linesizes[desc->component]; |
| const uint8_t *src = data[desc->component] + desc->y_offset * linesize + desc->x_offset; |
| int16_t *block = a->block[i]; |
| |
| for (int h = 0;; block += 8, src += linesize) { |
| int16_t last; |
| for (int w = 0; w < width_avail; ++w) |
| last = block[w] = src[w]; |
| for (int w = width_avail; w < 8; ++w) |
| block[w] = last; |
| if (++h == height_avail) |
| break; |
| } |
| const int16_t *const last_row = block; |
| for (int h = height_avail; h < 8; ++h) { |
| block += 8; |
| AV_COPY128(block, last_row); |
| } |
| |
| a->fdsp.fdct(a->block[i]); |
| } |
| |
| encode_mb(a, a->block); |
| } |
| |
| static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
| const AVFrame *pict, int *got_packet) |
| { |
| ASVEncContext *const a = avctx->priv_data; |
| const ASVCommonContext *const c = &a->c; |
| int size, ret; |
| |
| ret = ff_alloc_packet(avctx, pkt, c->mb_height * c->mb_width * MAX_MB_SIZE + 3); |
| if (ret < 0) |
| return ret; |
| |
| if (!PIXBLOCKDSP_8BPP_GET_PIXELS_SUPPORTS_UNALIGNED && |
| ((uintptr_t)pict->data[0] & 7 || pict->linesize[0] & 7 || |
| (uintptr_t)pict->data[1] & 7 || pict->linesize[1] & 7 || |
| (uintptr_t)pict->data[2] & 7 || pict->linesize[2] & 7)) |
| a->get_pixels = a->pdsp.get_pixels_unaligned; |
| else |
| a->get_pixels = a->pdsp.get_pixels; |
| |
| init_put_bits(&a->pb, pkt->data, pkt->size); |
| |
| for (int mb_y = 0; mb_y < c->mb_height2; mb_y++) { |
| for (int mb_x = 0; mb_x < c->mb_width2; mb_x++) { |
| dct_get(a, pict, mb_x, mb_y); |
| encode_mb(a, a->block); |
| } |
| } |
| |
| if (avctx->width & 15) { |
| const uint8_t *src[3] = { |
| pict->data[0] + c->mb_width2 * 16, |
| pict->data[1] + c->mb_width2 * 8, |
| pict->data[2] + c->mb_width2 * 8, |
| }; |
| int available_width = avctx->width & 15; |
| |
| for (int mb_y = 0; mb_y < c->mb_height2; mb_y++) { |
| handle_partial_mb(a, src, pict->linesize, available_width, 16); |
| src[0] += 16 * pict->linesize[0]; |
| src[1] += 8 * pict->linesize[1]; |
| src[2] += 8 * pict->linesize[2]; |
| } |
| } |
| |
| if (avctx->height & 15) { |
| const uint8_t *src[3] = { |
| pict->data[0] + c->mb_height2 * 16 * pict->linesize[0], |
| pict->data[1] + c->mb_height2 * 8 * pict->linesize[1], |
| pict->data[2] + c->mb_height2 * 8 * pict->linesize[2], |
| }; |
| int available_height = avctx->height & 15; |
| |
| for (int remaining = avctx->width;; remaining -= 16) { |
| handle_partial_mb(a, src, pict->linesize, remaining, available_height); |
| if (remaining <= 16) |
| break; |
| src[0] += 16; |
| src[1] += 8; |
| src[2] += 8; |
| } |
| } |
| |
| if (avctx->codec_id == AV_CODEC_ID_ASV1) |
| flush_put_bits(&a->pb); |
| else |
| flush_put_bits_le(&a->pb); |
| AV_WN32(put_bits_ptr(&a->pb), 0); |
| size = (put_bytes_output(&a->pb) + 3) / 4; |
| |
| if (avctx->codec_id == AV_CODEC_ID_ASV1) { |
| c->bbdsp.bswap_buf((uint32_t *) pkt->data, |
| (uint32_t *) pkt->data, size); |
| } |
| |
| pkt->size = size * 4; |
| *got_packet = 1; |
| |
| return 0; |
| } |
| |
| static av_cold int encode_init(AVCodecContext *avctx) |
| { |
| ASVEncContext *const a = avctx->priv_data; |
| int i; |
| const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2; |
| int inv_qscale; |
| |
| ff_asv_common_init(avctx); |
| ff_fdctdsp_init(&a->fdsp, avctx); |
| ff_pixblockdsp_init(&a->pdsp, 8); |
| |
| if (avctx->global_quality <= 0) |
| avctx->global_quality = 4 * FF_QUALITY_SCALE; |
| |
| inv_qscale = (32 * scale * FF_QUALITY_SCALE + |
| avctx->global_quality / 2) / avctx->global_quality; |
| |
| avctx->extradata = av_mallocz(8); |
| if (!avctx->extradata) |
| return AVERROR(ENOMEM); |
| avctx->extradata_size = 8; |
| AV_WL32A(avctx->extradata, inv_qscale); |
| AV_WL32A(avctx->extradata + 4, MKTAG('A', 'S', 'U', 'S')); |
| |
| for (i = 0; i < 64; i++) { |
| if (a->fdsp.fdct == ff_fdct_ifast) { |
| int q = 32LL * scale * ff_mpeg1_default_intra_matrix[i] * ff_aanscales[i]; |
| a->q_intra_matrix[i] = (((int64_t)inv_qscale << 30) + q / 2) / q; |
| } else { |
| int q = 32 * scale * ff_mpeg1_default_intra_matrix[i]; |
| a->q_intra_matrix[i] = ((inv_qscale << 16) + q / 2) / q; |
| } |
| } |
| |
| return 0; |
| } |
| |
| #if CONFIG_ASV1_ENCODER |
| const FFCodec ff_asv1_encoder = { |
| .p.name = "asv1", |
| CODEC_LONG_NAME("ASUS V1"), |
| .p.type = AVMEDIA_TYPE_VIDEO, |
| .p.id = AV_CODEC_ID_ASV1, |
| .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE, |
| .priv_data_size = sizeof(ASVEncContext), |
| .init = encode_init, |
| FF_CODEC_ENCODE_CB(encode_frame), |
| CODEC_PIXFMTS(AV_PIX_FMT_YUV420P), |
| .color_ranges = AVCOL_RANGE_MPEG, |
| }; |
| #endif |
| |
| #if CONFIG_ASV2_ENCODER |
| const FFCodec ff_asv2_encoder = { |
| .p.name = "asv2", |
| CODEC_LONG_NAME("ASUS V2"), |
| .p.type = AVMEDIA_TYPE_VIDEO, |
| .p.id = AV_CODEC_ID_ASV2, |
| .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE, |
| .priv_data_size = sizeof(ASVEncContext), |
| .init = encode_init, |
| FF_CODEC_ENCODE_CB(encode_frame), |
| CODEC_PIXFMTS(AV_PIX_FMT_YUV420P), |
| .color_ranges = AVCOL_RANGE_MPEG, |
| }; |
| #endif |
