cljr: drop unnecessary emms_c() calls without MMX code
[libav.git] / libavcodec / cljr.c
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1/*
2 * Cirrus Logic AccuPak (CLJR) codec
3 * Copyright (c) 2003 Alex Beregszaszi
4 *
2912e87a 5 * This file is part of Libav.
b78e7197 6 *
2912e87a 7 * Libav is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
3aff069b 11 *
2912e87a 12 * Libav is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
2912e87a 18 * License along with Libav; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
3aff069b 20 */
115329f1 21
3aff069b 22/**
ba87f080 23 * @file
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24 * Cirrus Logic AccuPak codec.
25 */
115329f1 26
3aff069b 27#include "avcodec.h"
9106a698 28#include "get_bits.h"
e93947b7 29#include "put_bits.h"
c7ac9449 30
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31typedef struct CLJRContext{
32 AVCodecContext *avctx;
33 AVFrame picture;
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34} CLJRContext;
35
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36static av_cold int common_init(AVCodecContext *avctx)
37{
38 CLJRContext * const a = avctx->priv_data;
39
bbc10185 40 avctx->coded_frame = &a->picture;
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41 a->avctx = avctx;
42
43 return 0;
44}
45
46#if CONFIG_CLJR_DECODER
115329f1 47static int decode_frame(AVCodecContext *avctx,
3aff069b 48 void *data, int *data_size,
7a00bbad 49 AVPacket *avpkt)
3aff069b 50{
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51 const uint8_t *buf = avpkt->data;
52 int buf_size = avpkt->size;
3aff069b 53 CLJRContext * const a = avctx->priv_data;
fc9489f6 54 GetBitContext gb;
3aff069b 55 AVFrame *picture = data;
bbc10185 56 AVFrame * const p = &a->picture;
d9c533a5 57 int x, y;
3aff069b 58
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59 if(p->data[0])
60 avctx->release_buffer(avctx, p);
61
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62 if(buf_size/avctx->height < avctx->width) {
63 av_log(avctx, AV_LOG_ERROR, "Resolution larger than buffer size. Invalid header?\n");
64 return -1;
65 }
66
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67 p->reference= 0;
68 if(avctx->get_buffer(avctx, p) < 0){
9b879566 69 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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70 return -1;
71 }
975a1447 72 p->pict_type= AV_PICTURE_TYPE_I;
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73 p->key_frame= 1;
74
fc9489f6 75 init_get_bits(&gb, buf, buf_size * 8);
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76
77 for(y=0; y<avctx->height; y++){
3aff069b 78 uint8_t *luma= &a->picture.data[0][ y*a->picture.linesize[0] ];
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79 uint8_t *cb= &a->picture.data[1][ y*a->picture.linesize[1] ];
80 uint8_t *cr= &a->picture.data[2][ y*a->picture.linesize[2] ];
3aff069b 81 for(x=0; x<avctx->width; x+=4){
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82 luma[3] = get_bits(&gb, 5) << 3;
83 luma[2] = get_bits(&gb, 5) << 3;
84 luma[1] = get_bits(&gb, 5) << 3;
85 luma[0] = get_bits(&gb, 5) << 3;
bb270c08 86 luma+= 4;
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87 *(cb++) = get_bits(&gb, 6) << 2;
88 *(cr++) = get_bits(&gb, 6) << 2;
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89 }
90 }
91
bbc10185 92 *picture = a->picture;
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93 *data_size = sizeof(AVPicture);
94
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95 return buf_size;
96}
97
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98static av_cold int decode_init(AVCodecContext *avctx)
99{
100 avctx->pix_fmt = PIX_FMT_YUV411P;
101 return common_init(avctx);
102}
103
104static av_cold int decode_end(AVCodecContext *avctx)
105{
106 CLJRContext *a = avctx->priv_data;
107
108 if (a->picture.data[0])
109 avctx->release_buffer(avctx, &a->picture);
110 return 0;
111}
112
113AVCodec ff_cljr_decoder = {
114 .name = "cljr",
115 .type = AVMEDIA_TYPE_VIDEO,
116 .id = CODEC_ID_CLJR,
117 .priv_data_size = sizeof(CLJRContext),
118 .init = decode_init,
119 .close = decode_end,
120 .decode = decode_frame,
121 .capabilities = CODEC_CAP_DR1,
122 .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
123};
124#endif
125
b250f9c6 126#if CONFIG_CLJR_ENCODER
3aff069b 127static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
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128 PutBitContext pb;
129 AVFrame *p = data;
130 int x, y;
3aff069b 131
975a1447 132 p->pict_type= AV_PICTURE_TYPE_I;
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133 p->key_frame= 1;
134
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135 init_put_bits(&pb, buf, buf_size / 8);
136
137 for (y = 0; y < avctx->height; y++) {
138 uint8_t *luma = &p->data[0][y * p->linesize[0]];
139 uint8_t *cb = &p->data[1][y * p->linesize[1]];
140 uint8_t *cr = &p->data[2][y * p->linesize[2]];
141 for (x = 0; x < avctx->width; x += 4) {
142 put_bits(&pb, 5, luma[3] >> 3);
143 put_bits(&pb, 5, luma[2] >> 3);
144 put_bits(&pb, 5, luma[1] >> 3);
145 put_bits(&pb, 5, luma[0] >> 3);
146 luma += 4;
147 put_bits(&pb, 6, *(cb++) >> 2);
148 put_bits(&pb, 6, *(cr++) >> 2);
149 }
150 }
115329f1 151
e93947b7 152 flush_put_bits(&pb);
115329f1 153
e93947b7 154 return put_bits_count(&pb) / 8;
3aff069b 155}
3aff069b 156
d36beb3f 157AVCodec ff_cljr_encoder = {
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158 .name = "cljr",
159 .type = AVMEDIA_TYPE_VIDEO,
160 .id = CODEC_ID_CLJR,
161 .priv_data_size = sizeof(CLJRContext),
baf3b6e5 162 .init = common_init,
ec6402b7 163 .encode = encode_frame,
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164 .pix_fmts = (const enum PixelFormat[]) { PIX_FMT_YUV411P,
165 PIX_FMT_NONE },
166 .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
3aff069b 167};
f544a5fc 168#endif