2 * Copyright (c) 2003 Michael Niedermayer
4 * This file is part of Libav.
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #include "libavutil/attributes.h"
27 #include "libavutil/mem.h"
34 #include "mpeg12data.h"
36 static inline void asv2_put_bits(PutBitContext *pb, int n, int v)
38 put_bits(pb, n, ff_reverse[v << (8 - n)]);
41 static inline void asv1_put_level(PutBitContext *pb, int level)
43 unsigned int index = level + 3;
46 put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]);
48 put_bits(pb, ff_asv_level_tab[3][1], ff_asv_level_tab[3][0]);
49 put_sbits(pb, 8, level);
53 static inline void asv2_put_level(PutBitContext *pb, int level)
55 unsigned int index = level + 31;
58 put_bits(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]);
60 put_bits(pb, ff_asv2_level_tab[31][1], ff_asv2_level_tab[31][0]);
61 asv2_put_bits(pb, 8, level & 0xFF);
65 static inline void asv1_encode_block(ASV1Context *a, int16_t block[64])
70 put_bits(&a->pb, 8, (block[0] + 32) >> 6);
73 for (i = 0; i < 10; i++) {
74 const int index = ff_asv_scantab[4 * i];
77 if ((block[index + 0] = (block[index + 0] *
78 a->q_intra_matrix[index + 0] + (1 << 15)) >> 16))
80 if ((block[index + 8] = (block[index + 8] *
81 a->q_intra_matrix[index + 8] + (1 << 15)) >> 16))
83 if ((block[index + 1] = (block[index + 1] *
84 a->q_intra_matrix[index + 1] + (1 << 15)) >> 16))
86 if ((block[index + 9] = (block[index + 9] *
87 a->q_intra_matrix[index + 9] + (1 << 15)) >> 16))
91 for (; nc_count; nc_count--)
92 put_bits(&a->pb, ff_asv_ccp_tab[0][1], ff_asv_ccp_tab[0][0]);
94 put_bits(&a->pb, ff_asv_ccp_tab[ccp][1], ff_asv_ccp_tab[ccp][0]);
97 asv1_put_level(&a->pb, block[index + 0]);
99 asv1_put_level(&a->pb, block[index + 8]);
101 asv1_put_level(&a->pb, block[index + 1]);
103 asv1_put_level(&a->pb, block[index + 9]);
108 put_bits(&a->pb, ff_asv_ccp_tab[16][1], ff_asv_ccp_tab[16][0]);
111 static inline int asv2_encode_block(ASV1Context *a, int16_t block[64])
116 for (count = 63; count > 3; count--) {
117 const int index = ff_asv_scantab[count];
118 if ((block[index] * a->q_intra_matrix[index] + (1 << 15)) >> 16)
124 asv2_put_bits(&a->pb, 4, count);
125 asv2_put_bits(&a->pb, 8, (block[0] + 32) >> 6);
128 for (i = 0; i <= count; i++) {
129 const int index = ff_asv_scantab[4 * i];
132 if ((block[index + 0] = (block[index + 0] *
133 a->q_intra_matrix[index + 0] + (1 << 15)) >> 16))
135 if ((block[index + 8] = (block[index + 8] *
136 a->q_intra_matrix[index + 8] + (1 << 15)) >> 16))
138 if ((block[index + 1] = (block[index + 1] *
139 a->q_intra_matrix[index + 1] + (1 << 15)) >> 16))
141 if ((block[index + 9] = (block[index + 9] *
142 a->q_intra_matrix[index + 9] + (1 << 15)) >> 16))
148 put_bits(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]);
150 put_bits(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]);
154 asv2_put_level(&a->pb, block[index + 0]);
156 asv2_put_level(&a->pb, block[index + 8]);
158 asv2_put_level(&a->pb, block[index + 1]);
160 asv2_put_level(&a->pb, block[index + 9]);
167 #define MAX_MB_SIZE (30 * 16 * 16 * 3 / 2 / 8)
169 static inline int encode_mb(ASV1Context *a, int16_t block[6][64])
173 if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb) >> 3) < MAX_MB_SIZE) {
174 av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
178 if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
179 for (i = 0; i < 6; i++)
180 asv1_encode_block(a, block[i]);
182 for (i = 0; i < 6; i++) {
183 ret = asv2_encode_block(a, block[i]);
191 static inline void dct_get(ASV1Context *a, const AVFrame *frame,
194 int16_t (*block)[64] = a->block;
195 int linesize = frame->linesize[0];
198 uint8_t *ptr_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16;
199 uint8_t *ptr_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8;
200 uint8_t *ptr_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8;
202 a->pdsp.get_pixels(block[0], ptr_y, linesize);
203 a->pdsp.get_pixels(block[1], ptr_y + 8, linesize);
204 a->pdsp.get_pixels(block[2], ptr_y + 8 * linesize, linesize);
205 a->pdsp.get_pixels(block[3], ptr_y + 8 * linesize + 8, linesize);
206 for (i = 0; i < 4; i++)
207 a->fdsp.fdct(block[i]);
209 if (!(a->avctx->flags & AV_CODEC_FLAG_GRAY)) {
210 a->pdsp.get_pixels(block[4], ptr_cb, frame->linesize[1]);
211 a->pdsp.get_pixels(block[5], ptr_cr, frame->linesize[2]);
212 for (i = 4; i < 6; i++)
213 a->fdsp.fdct(block[i]);
217 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
218 const AVFrame *pict, int *got_packet)
220 ASV1Context *const a = avctx->priv_data;
225 (ret = av_new_packet(pkt, a->mb_height * a->mb_width * MAX_MB_SIZE +
226 AV_INPUT_BUFFER_MIN_SIZE)) < 0) {
227 av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
231 init_put_bits(&a->pb, pkt->data, pkt->size);
233 for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
234 for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
235 dct_get(a, pict, mb_x, mb_y);
236 encode_mb(a, a->block);
240 if (a->mb_width2 != a->mb_width) {
242 for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
243 dct_get(a, pict, mb_x, mb_y);
244 encode_mb(a, a->block);
248 if (a->mb_height2 != a->mb_height) {
249 mb_y = a->mb_height2;
250 for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
251 dct_get(a, pict, mb_x, mb_y);
252 encode_mb(a, a->block);
257 avpriv_align_put_bits(&a->pb);
258 while (put_bits_count(&a->pb) & 31)
259 put_bits(&a->pb, 8, 0);
261 size = put_bits_count(&a->pb) / 32;
263 if (avctx->codec_id == AV_CODEC_ID_ASV1) {
264 a->bbdsp.bswap_buf((uint32_t *) pkt->data,
265 (uint32_t *) pkt->data, size);
268 for (i = 0; i < 4 * size; i++)
269 pkt->data[i] = ff_reverse[pkt->data[i]];
272 pkt->size = size * 4;
273 pkt->flags |= AV_PKT_FLAG_KEY;
279 static av_cold int encode_init(AVCodecContext *avctx)
281 ASV1Context *const a = avctx->priv_data;
283 const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
285 #if FF_API_CODED_FRAME
286 FF_DISABLE_DEPRECATION_WARNINGS
287 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
288 avctx->coded_frame->key_frame = 1;
289 FF_ENABLE_DEPRECATION_WARNINGS
292 ff_asv_common_init(avctx);
293 ff_fdctdsp_init(&a->fdsp, avctx);
294 ff_pixblockdsp_init(&a->pdsp, avctx);
296 if (avctx->global_quality == 0)
297 avctx->global_quality = 4 * FF_QUALITY_SCALE;
299 a->inv_qscale = (32 * scale * FF_QUALITY_SCALE +
300 avctx->global_quality / 2) / avctx->global_quality;
302 avctx->extradata = av_mallocz(8);
303 if (!avctx->extradata)
304 return AVERROR(ENOMEM);
305 avctx->extradata_size = 8;
306 ((uint32_t *) avctx->extradata)[0] = av_le2ne32(a->inv_qscale);
307 ((uint32_t *) avctx->extradata)[1] = av_le2ne32(AV_RL32("ASUS"));
309 for (i = 0; i < 64; i++) {
310 int q = 32 * scale * ff_mpeg1_default_intra_matrix[i];
311 a->q_intra_matrix[i] = ((a->inv_qscale << 16) + q / 2) / q;
317 #if CONFIG_ASV1_ENCODER
318 AVCodec ff_asv1_encoder = {
320 .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
321 .type = AVMEDIA_TYPE_VIDEO,
322 .id = AV_CODEC_ID_ASV1,
323 .priv_data_size = sizeof(ASV1Context),
325 .encode2 = encode_frame,
326 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
328 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
332 #if CONFIG_ASV2_ENCODER
333 AVCodec ff_asv2_encoder = {
335 .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
336 .type = AVMEDIA_TYPE_VIDEO,
337 .id = AV_CODEC_ID_ASV2,
338 .priv_data_size = sizeof(ASV1Context),
340 .encode2 = encode_frame,
341 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
343 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,