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ffmpeg/libavcodec/asvenc.c

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/*
* 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 "mpeg12data.h"
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, 3, 0); /* Escape code */
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_le(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]);
} else {
put_bits_le(pb, 5, 0); /* Escape code */
if (level < -128 || level > 127) {
av_log(a->avctx, AV_LOG_WARNING, "Clipping level %d, increase qscale\n", level);
level = av_clip_int8(level);
}
put_bits_le(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, 2, 2); /* Skip */
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, 5, 0xF); /* End of block */
}
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;
put_bits_le(&a->pb, 4, count);
put_bits_le(&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_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]);
}
}
}
#define MAX_MB_SIZE (30 * 16 * 16 * 3 / 2 / 8)
static inline int encode_mb(ASV1Context *a, int16_t block[6][64])
{
int i;
av_assert0(a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb) >> 3) >= MAX_MB_SIZE);
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, 0);
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();
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_bits_count(&a->pb) + 31) / 32;
if (avctx->codec_id == AV_CODEC_ID_ASV1) {
a->bbdsp.bswap_buf((uint32_t *) pkt->data,
(uint32_t *) pkt->data, size);
}
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
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