2 * Copyright (c) 2003 Michael Niedermayer
4 * This file is part of FFmpeg.
6 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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"
29 #include "aandcttab.h"
36 #include "mpeg12data.h"
38 static inline void asv2_put_bits(PutBitContext *pb, int n, int v)
40 put_bits(pb, n, ff_reverse[v << (8 - n)]);
43 static inline void asv1_put_level(PutBitContext *pb, int level)
45 unsigned int index = level + 3;
48 put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]);
50 put_bits(pb, ff_asv_level_tab[3][1], ff_asv_level_tab[3][0]);
51 put_sbits(pb, 8, level);
55 static inline void asv2_put_level(ASV1Context *a, PutBitContext *pb, int level)
57 unsigned int index = level + 31;
60 put_bits(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]);
62 put_bits(pb, ff_asv2_level_tab[31][1], ff_asv2_level_tab[31][0]);
63 if (level < -128 || level > 127) {
64 av_log(a->avctx, AV_LOG_WARNING, "Cliping level %d, increase qscale\n", level);
65 level = av_clip_int8(level);
67 asv2_put_bits(pb, 8, level & 0xFF);
71 static inline void asv1_encode_block(ASV1Context *a, int16_t block[64])
76 put_bits(&a->pb, 8, (block[0] + 32) >> 6);
79 for (i = 0; i < 10; i++) {
80 const int index = ff_asv_scantab[4 * i];
83 if ((block[index + 0] = (block[index + 0] *
84 a->q_intra_matrix[index + 0] + (1 << 15)) >> 16))
86 if ((block[index + 8] = (block[index + 8] *
87 a->q_intra_matrix[index + 8] + (1 << 15)) >> 16))
89 if ((block[index + 1] = (block[index + 1] *
90 a->q_intra_matrix[index + 1] + (1 << 15)) >> 16))
92 if ((block[index + 9] = (block[index + 9] *
93 a->q_intra_matrix[index + 9] + (1 << 15)) >> 16))
97 for (; nc_count; nc_count--)
98 put_bits(&a->pb, ff_asv_ccp_tab[0][1], ff_asv_ccp_tab[0][0]);
100 put_bits(&a->pb, ff_asv_ccp_tab[ccp][1], ff_asv_ccp_tab[ccp][0]);
103 asv1_put_level(&a->pb, block[index + 0]);
105 asv1_put_level(&a->pb, block[index + 8]);
107 asv1_put_level(&a->pb, block[index + 1]);
109 asv1_put_level(&a->pb, block[index + 9]);
114 put_bits(&a->pb, ff_asv_ccp_tab[16][1], ff_asv_ccp_tab[16][0]);
117 static inline void asv2_encode_block(ASV1Context *a, int16_t block[64])
122 for (count = 63; count > 3; count--) {
123 const int index = ff_asv_scantab[count];
124 if ((block[index] * a->q_intra_matrix[index] + (1 << 15)) >> 16)
130 asv2_put_bits(&a->pb, 4, count);
131 asv2_put_bits(&a->pb, 8, (block[0] + 32) >> 6);
134 for (i = 0; i <= count; i++) {
135 const int index = ff_asv_scantab[4 * i];
138 if ((block[index + 0] = (block[index + 0] *
139 a->q_intra_matrix[index + 0] + (1 << 15)) >> 16))
141 if ((block[index + 8] = (block[index + 8] *
142 a->q_intra_matrix[index + 8] + (1 << 15)) >> 16))
144 if ((block[index + 1] = (block[index + 1] *
145 a->q_intra_matrix[index + 1] + (1 << 15)) >> 16))
147 if ((block[index + 9] = (block[index + 9] *
148 a->q_intra_matrix[index + 9] + (1 << 15)) >> 16))
151 av_assert2(i || ccp < 8);
153 put_bits(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]);
155 put_bits(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]);
159 asv2_put_level(a, &a->pb, block[index + 0]);
161 asv2_put_level(a, &a->pb, block[index + 8]);
163 asv2_put_level(a, &a->pb, block[index + 1]);
165 asv2_put_level(a, &a->pb, block[index + 9]);
170 #define MAX_MB_SIZE (30 * 16 * 16 * 3 / 2 / 8)
172 static inline int encode_mb(ASV1Context *a, int16_t block[6][64])
176 if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb) >> 3) < MAX_MB_SIZE) {
177 av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
181 if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
182 for (i = 0; i < 6; i++)
183 asv1_encode_block(a, block[i]);
185 for (i = 0; i < 6; i++) {
186 asv2_encode_block(a, block[i]);
192 static inline void dct_get(ASV1Context *a, const AVFrame *frame,
195 int16_t (*block)[64] = a->block;
196 int linesize = frame->linesize[0];
199 uint8_t *ptr_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16;
200 uint8_t *ptr_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8;
201 uint8_t *ptr_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8;
203 a->pdsp.get_pixels(block[0], ptr_y, linesize);
204 a->pdsp.get_pixels(block[1], ptr_y + 8, linesize);
205 a->pdsp.get_pixels(block[2], ptr_y + 8 * linesize, linesize);
206 a->pdsp.get_pixels(block[3], ptr_y + 8 * linesize + 8, linesize);
207 for (i = 0; i < 4; i++)
208 a->fdsp.fdct(block[i]);
210 if (!(a->avctx->flags & CODEC_FLAG_GRAY)) {
211 a->pdsp.get_pixels(block[4], ptr_cb, frame->linesize[1]);
212 a->pdsp.get_pixels(block[5], ptr_cr, frame->linesize[2]);
213 for (i = 4; i < 6; i++)
214 a->fdsp.fdct(block[i]);
218 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
219 const AVFrame *pict, int *got_packet)
221 ASV1Context *const a = avctx->priv_data;
225 if (pict->width % 16 || pict->height % 16) {
226 AVFrame *clone = av_frame_alloc();
230 return AVERROR(ENOMEM);
231 clone->format = pict->format;
232 clone->width = FFALIGN(pict->width, 16);
233 clone->height = FFALIGN(pict->height, 16);
234 ret = av_frame_get_buffer(clone, 32);
236 av_frame_free(&clone);
240 ret = av_frame_copy(clone, pict);
242 av_frame_free(&clone);
246 for (i = 0; i<3; i++) {
248 int w = FF_CEIL_RSHIFT(pict->width, !!i);
249 int h = FF_CEIL_RSHIFT(pict->height, !!i);
250 int w2 = FF_CEIL_RSHIFT(clone->width, !!i);
251 int h2 = FF_CEIL_RSHIFT(clone->height, !!i);
254 clone->data[i][x + y*clone->linesize[i]] =
255 clone->data[i][w - 1 + y*clone->linesize[i]];
258 clone->data[i][x + y*clone->linesize[i]] =
259 clone->data[i][x + (h-1)*clone->linesize[i]];
261 ret = encode_frame(avctx, pkt, clone, got_packet);
263 av_frame_free(&clone);
267 if ((ret = ff_alloc_packet2(avctx, pkt, a->mb_height * a->mb_width * MAX_MB_SIZE +
268 FF_MIN_BUFFER_SIZE)) < 0)
271 init_put_bits(&a->pb, pkt->data, pkt->size);
273 for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
274 for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
275 dct_get(a, pict, mb_x, mb_y);
276 encode_mb(a, a->block);
280 if (a->mb_width2 != a->mb_width) {
282 for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
283 dct_get(a, pict, mb_x, mb_y);
284 encode_mb(a, a->block);
288 if (a->mb_height2 != a->mb_height) {
289 mb_y = a->mb_height2;
290 for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
291 dct_get(a, pict, mb_x, mb_y);
292 encode_mb(a, a->block);
297 avpriv_align_put_bits(&a->pb);
298 while (put_bits_count(&a->pb) & 31)
299 put_bits(&a->pb, 8, 0);
301 size = put_bits_count(&a->pb) / 32;
303 if (avctx->codec_id == AV_CODEC_ID_ASV1) {
304 a->bbdsp.bswap_buf((uint32_t *) pkt->data,
305 (uint32_t *) pkt->data, size);
308 for (i = 0; i < 4 * size; i++)
309 pkt->data[i] = ff_reverse[pkt->data[i]];
312 pkt->size = size * 4;
313 pkt->flags |= AV_PKT_FLAG_KEY;
319 static av_cold int encode_init(AVCodecContext *avctx)
321 ASV1Context *const a = avctx->priv_data;
323 const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
325 ff_asv_common_init(avctx);
326 ff_fdctdsp_init(&a->fdsp, avctx);
327 ff_pixblockdsp_init(&a->pdsp, avctx);
329 if (avctx->global_quality <= 0)
330 avctx->global_quality = 4 * FF_QUALITY_SCALE;
332 a->inv_qscale = (32 * scale * FF_QUALITY_SCALE +
333 avctx->global_quality / 2) / avctx->global_quality;
335 avctx->extradata = av_mallocz(8);
336 avctx->extradata_size = 8;
337 ((uint32_t *) avctx->extradata)[0] = av_le2ne32(a->inv_qscale);
338 ((uint32_t *) avctx->extradata)[1] = av_le2ne32(AV_RL32("ASUS"));
340 for (i = 0; i < 64; i++) {
341 if (a->fdsp.fdct == ff_fdct_ifast) {
342 int q = 32LL * scale * ff_mpeg1_default_intra_matrix[i] * ff_aanscales[i];
343 a->q_intra_matrix[i] = (((int64_t)a->inv_qscale << 30) + q / 2) / q;
345 int q = 32 * scale * ff_mpeg1_default_intra_matrix[i];
346 a->q_intra_matrix[i] = ((a->inv_qscale << 16) + q / 2) / q;
353 #if CONFIG_ASV1_ENCODER
354 AVCodec ff_asv1_encoder = {
356 .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
357 .type = AVMEDIA_TYPE_VIDEO,
358 .id = AV_CODEC_ID_ASV1,
359 .priv_data_size = sizeof(ASV1Context),
361 .encode2 = encode_frame,
362 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
367 #if CONFIG_ASV2_ENCODER
368 AVCodec ff_asv2_encoder = {
370 .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
371 .type = AVMEDIA_TYPE_VIDEO,
372 .id = AV_CODEC_ID_ASV2,
373 .priv_data_size = sizeof(ASV1Context),
375 .encode2 = encode_frame,
376 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,