/* * 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 "libavutil/attributes.h" #include "libavutil/mem.h" #include "aandcttab.h" #include "asv.h" #include "avcodec.h" #include "dct.h" #include "fdctdsp.h" #include "internal.h" #include "mathops.h" #include "mpeg12data.h" static inline void asv2_put_bits(PutBitContext *pb, int n, int v) { put_bits(pb, n, ff_reverse[v << (8 - n)]); } static inline void asv1_put_level(PutBitContext *pb, int level) { unsigned int index = level + 3; if (index <= 6) { put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]); } else { put_bits(pb, ff_asv_level_tab[3][1], ff_asv_level_tab[3][0]); put_sbits(pb, 8, level); } } static inline void asv2_put_level(ASV1Context *a, PutBitContext *pb, int level) { unsigned int index = level + 31; if (index <= 62) { put_bits(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]); } else { put_bits(pb, ff_asv2_level_tab[31][1], ff_asv2_level_tab[31][0]); if (level < -128 || level > 127) { av_log(a->avctx, AV_LOG_WARNING, "Clipping level %d, increase qscale\n", level); level = av_clip_int8(level); } asv2_put_bits(pb, 8, level & 0xFF); } } static inline void asv1_encode_block(ASV1Context *a, int16_t block[64]) { int i; int nc_count = 0; put_bits(&a->pb, 8, (block[0] + 32) >> 6); block[0] = 0; for (i = 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) { for (; nc_count; nc_count--) put_bits(&a->pb, ff_asv_ccp_tab[0][1], ff_asv_ccp_tab[0][0]); put_bits(&a->pb, ff_asv_ccp_tab[ccp][1], ff_asv_ccp_tab[ccp][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_count++; } } put_bits(&a->pb, ff_asv_ccp_tab[16][1], ff_asv_ccp_tab[16][0]); } static inline void asv2_encode_block(ASV1Context *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; asv2_put_bits(&a->pb, 4, count); asv2_put_bits(&a->pb, 8, (block[0] + 32) >> 6); 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(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]); else put_bits(&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]); } } } #define MAX_MB_SIZE (30 * 16 * 16 * 3 / 2 / 8) static inline int encode_mb(ASV1Context *a, int16_t block[6][64]) { int i; if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb) >> 3) < MAX_MB_SIZE) { av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n"); return -1; } if (a->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(ASV1Context *a, const AVFrame *frame, int mb_x, int mb_y) { int16_t (*block)[64] = a->block; int linesize = frame->linesize[0]; int i; uint8_t *ptr_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16; uint8_t *ptr_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8; uint8_t *ptr_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8; a->pdsp.get_pixels(block[0], ptr_y, linesize); a->pdsp.get_pixels(block[1], ptr_y + 8, linesize); a->pdsp.get_pixels(block[2], ptr_y + 8 * linesize, linesize); a->pdsp.get_pixels(block[3], ptr_y + 8 * linesize + 8, linesize); for (i = 0; i < 4; i++) a->fdsp.fdct(block[i]); if (!(a->avctx->flags & AV_CODEC_FLAG_GRAY)) { a->pdsp.get_pixels(block[4], ptr_cb, frame->linesize[1]); a->pdsp.get_pixels(block[5], ptr_cr, frame->linesize[2]); for (i = 4; i < 6; i++) a->fdsp.fdct(block[i]); } } static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet) { ASV1Context *const a = avctx->priv_data; int size, ret; int mb_x, mb_y; if (pict->width % 16 || pict->height % 16) { AVFrame *clone = av_frame_alloc(); int i; if (!clone) return AVERROR(ENOMEM); clone->format = pict->format; clone->width = FFALIGN(pict->width, 16); clone->height = FFALIGN(pict->height, 16); ret = av_frame_get_buffer(clone, 32); if (ret < 0) { av_frame_free(&clone); return ret; } ret = av_frame_copy(clone, pict); if (ret < 0) { av_frame_free(&clone); return ret; } for (i = 0; i<3; i++) { int x, y; int w = AV_CEIL_RSHIFT(pict->width, !!i); int h = AV_CEIL_RSHIFT(pict->height, !!i); int w2 = AV_CEIL_RSHIFT(clone->width, !!i); int h2 = AV_CEIL_RSHIFT(clone->height, !!i); for (y=0; y<h; y++) for (x=w; x<w2; x++) clone->data[i][x + y*clone->linesize[i]] = clone->data[i][w - 1 + y*clone->linesize[i]]; for (y=h; y<h2; y++) for (x=0; x<w2; x++) clone->data[i][x + y*clone->linesize[i]] = clone->data[i][x + (h-1)*clone->linesize[i]]; } ret = encode_frame(avctx, pkt, clone, got_packet); av_frame_free(&clone); return ret; } if ((ret = ff_alloc_packet2(avctx, pkt, a->mb_height * a->mb_width * MAX_MB_SIZE + AV_INPUT_BUFFER_MIN_SIZE, 0)) < 0) return ret; init_put_bits(&a->pb, pkt->data, pkt->size); for (mb_y = 0; mb_y < a->mb_height2; mb_y++) { for (mb_x = 0; mb_x < a->mb_width2; mb_x++) { dct_get(a, pict, mb_x, mb_y); encode_mb(a, a->block); } } if (a->mb_width2 != a->mb_width) { mb_x = a->mb_width2; for (mb_y = 0; mb_y < a->mb_height2; mb_y++) { dct_get(a, pict, mb_x, mb_y); encode_mb(a, a->block); } } if (a->mb_height2 != a->mb_height) { mb_y = a->mb_height2; for (mb_x = 0; mb_x < a->mb_width; mb_x++) { dct_get(a, pict, mb_x, mb_y); encode_mb(a, a->block); } } emms_c(); avpriv_align_put_bits(&a->pb); while (put_bits_count(&a->pb) & 31) put_bits(&a->pb, 8, 0); size = put_bits_count(&a->pb) / 32; if (avctx->codec_id == AV_CODEC_ID_ASV1) { a->bbdsp.bswap_buf((uint32_t *) pkt->data, (uint32_t *) pkt->data, size); } else { int i; for (i = 0; i < 4 * size; i++) pkt->data[i] = ff_reverse[pkt->data[i]]; } pkt->size = size * 4; pkt->flags |= AV_PKT_FLAG_KEY; *got_packet = 1; return 0; } static av_cold int encode_init(AVCodecContext *avctx) { ASV1Context *const a = avctx->priv_data; int i; const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2; ff_asv_common_init(avctx); ff_fdctdsp_init(&a->fdsp, avctx); ff_pixblockdsp_init(&a->pdsp, avctx); if (avctx->global_quality <= 0) avctx->global_quality = 4 * FF_QUALITY_SCALE; a->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; ((uint32_t *) avctx->extradata)[0] = av_le2ne32(a->inv_qscale); ((uint32_t *) avctx->extradata)[1] = av_le2ne32(AV_RL32("ASUS")); 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)a->inv_qscale << 30) + q / 2) / q; } else { int q = 32 * scale * ff_mpeg1_default_intra_matrix[i]; a->q_intra_matrix[i] = ((a->inv_qscale << 16) + q / 2) / q; } } return 0; } #if CONFIG_ASV1_ENCODER AVCodec ff_asv1_encoder = { .name = "asv1", .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"), .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_ASV1, .priv_data_size = sizeof(ASV1Context), .init = encode_init, .encode2 = encode_frame, .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, }; #endif #if CONFIG_ASV2_ENCODER AVCodec ff_asv2_encoder = { .name = "asv2", .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"), .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_ASV2, .priv_data_size = sizeof(ASV1Context), .init = encode_init, .encode2 = encode_frame, .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, }; #endif