[deb_ffmpeg.git] / ffmpeg / libavcodec / 012v.c

/*
 * 012v decoder
 *
 * Copyright (C) 2012 Carl Eugen Hoyos
 *
 * 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
 */

#include "avcodec.h"
#include "internal.h"
#include "libavutil/intreadwrite.h"

static av_cold int zero12v_decode_init(AVCodecContext *avctx)
{
    avctx->pix_fmt             = AV_PIX_FMT_YUV422P16;
    avctx->bits_per_raw_sample = 10;

    if (avctx->codec_tag == MKTAG('a', '1', '2', 'v'))
        avpriv_request_sample(avctx, "transparency");

    return 0;
}

static int zero12v_decode_frame(AVCodecContext *avctx, void *data,
                                int *got_frame, AVPacket *avpkt)
{
    int line = 0, ret;
    const int width = avctx->width;
    AVFrame *pic = data;
    uint16_t *y, *u, *v;
    const uint8_t *line_end, *src = avpkt->data;
    int stride = avctx->width * 8 / 3;

    if (width == 1) {
        av_log(avctx, AV_LOG_ERROR, "Width 1 not supported.\n");
        return AVERROR_INVALIDDATA;
    }

    if (   avctx->codec_tag == MKTAG('0', '1', '2', 'v')
        && avpkt->size % avctx->height == 0
        && avpkt->size / avctx->height * 3 >= width * 8)
        stride = avpkt->size / avctx->height;

    if (avpkt->size < avctx->height * stride) {
        av_log(avctx, AV_LOG_ERROR, "Packet too small: %d instead of %d\n",
               avpkt->size, avctx->height * stride);
        return AVERROR_INVALIDDATA;
    }

    if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
        return ret;

    pic->pict_type = AV_PICTURE_TYPE_I;
    pic->key_frame = 1;

    y = (uint16_t *)pic->data[0];
    u = (uint16_t *)pic->data[1];
    v = (uint16_t *)pic->data[2];
    line_end = avpkt->data + stride;

    while (line++ < avctx->height) {
        while (1) {
            uint32_t t = AV_RL32(src);
            src += 4;
            *u++ = t <<  6 & 0xFFC0;
            *y++ = t >>  4 & 0xFFC0;
            *v++ = t >> 14 & 0xFFC0;

            if (src >= line_end - 1) {
                *y = 0x80;
                src++;
                line_end += stride;
                y = (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
                u = (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
                v = (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
                break;
            }

            t = AV_RL32(src);
            src += 4;
            *y++ = t <<  6 & 0xFFC0;
            *u++ = t >>  4 & 0xFFC0;
            *y++ = t >> 14 & 0xFFC0;
            if (src >= line_end - 2) {
                if (!(width & 1)) {
                    *y = 0x80;
                    src += 2;
                }
                line_end += stride;
                y = (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
                u = (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
                v = (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
                break;
            }

            t = AV_RL32(src);
            src += 4;
            *v++ = t <<  6 & 0xFFC0;
            *y++ = t >>  4 & 0xFFC0;
            *u++ = t >> 14 & 0xFFC0;

            if (src >= line_end - 1) {
                *y = 0x80;
                src++;
                line_end += stride;
                y = (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
                u = (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
                v = (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
                break;
            }

            t = AV_RL32(src);
            src += 4;
            *y++ = t <<  6 & 0xFFC0;
            *v++ = t >>  4 & 0xFFC0;
            *y++ = t >> 14 & 0xFFC0;

            if (src >= line_end - 2) {
                if (width & 1) {
                    *y = 0x80;
                    src += 2;
                }
                line_end += stride;
                y = (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
                u = (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
                v = (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
                break;
            }
        }
    }

    *got_frame = 1;

    return avpkt->size;
}

AVCodec ff_zero12v_decoder = {
    .name           = "012v",
    .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_012V,
    .init           = zero12v_decode_init,
    .decode         = zero12v_decode_frame,
    .capabilities   = CODEC_CAP_DR1,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* 012v decoder
	3	*
	4	* Copyright (C) 2012 Carl Eugen Hoyos
	5	*
	6	* This file is part of FFmpeg.
	7	*
	8	* FFmpeg is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU Lesser General Public
	10	* License as published by the Free Software Foundation; either
	11	* version 2.1 of the License, or (at your option) any later version.
	12	*
	13	* FFmpeg is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* Lesser General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU Lesser General Public
	19	* License along with FFmpeg; if not, write to the Free Software
	20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	21	*/
	22
	23	#include "avcodec.h"
	24	#include "internal.h"
	25	#include "libavutil/intreadwrite.h"
	26
	27	static av_cold int zero12v_decode_init(AVCodecContext *avctx)
	28	{
	29	avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
	30	avctx->bits_per_raw_sample = 10;
	31
	32	if (avctx->codec_tag == MKTAG('a', '1', '2', 'v'))
	33	avpriv_request_sample(avctx, "transparency");
	34
	35	return 0;
	36	}
	37
	38	static int zero12v_decode_frame(AVCodecContext avctx, void data,
	39	int got_frame, AVPacket avpkt)
	40	{
	41	int line = 0, ret;
	42	const int width = avctx->width;
	43	AVFrame *pic = data;
	44	uint16_t y, u, *v;
	45	const uint8_t line_end, src = avpkt->data;
	46	int stride = avctx->width * 8 / 3;
	47
	48	if (width == 1) {
	49	av_log(avctx, AV_LOG_ERROR, "Width 1 not supported.\n");
	50	return AVERROR_INVALIDDATA;
	51	}
	52
	53	if ( avctx->codec_tag == MKTAG('0', '1', '2', 'v')
	54	&& avpkt->size % avctx->height == 0
	55	&& avpkt->size / avctx->height * 3 >= width * 8)
	56	stride = avpkt->size / avctx->height;
	57
	58	if (avpkt->size < avctx->height * stride) {
	59	av_log(avctx, AV_LOG_ERROR, "Packet too small: %d instead of %d\n",
	60	avpkt->size, avctx->height * stride);
	61	return AVERROR_INVALIDDATA;
	62	}
	63
	64	if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
65	return ret;
66
67	pic->pict_type = AV_PICTURE_TYPE_I;
68	pic->key_frame = 1;
69
70	y = (uint16_t *)pic->data[0];
71	u = (uint16_t *)pic->data[1];
72	v = (uint16_t *)pic->data[2];
73	line_end = avpkt->data + stride;
74
75	while (line++ < avctx->height) {
76	while (1) {
77	uint32_t t = AV_RL32(src);
78	src += 4;
79	*u++ = t << 6 & 0xFFC0;
80	*y++ = t >> 4 & 0xFFC0;
81	*v++ = t >> 14 & 0xFFC0;
82
83	if (src >= line_end - 1) {
84	*y = 0x80;
85	src++;
86	line_end += stride;
87	y = (uint16_t )(pic->data[0] + line pic->linesize[0]);
88	u = (uint16_t )(pic->data[1] + line pic->linesize[1]);
89	v = (uint16_t )(pic->data[2] + line pic->linesize[2]);
90	break;
91	}
92
93	t = AV_RL32(src);
94	src += 4;
95	*y++ = t << 6 & 0xFFC0;
96	*u++ = t >> 4 & 0xFFC0;
97	*y++ = t >> 14 & 0xFFC0;
98	if (src >= line_end - 2) {
99	if (!(width & 1)) {
100	*y = 0x80;
101	src += 2;
102	}
103	line_end += stride;
104	y = (uint16_t )(pic->data[0] + line pic->linesize[0]);
105	u = (uint16_t )(pic->data[1] + line pic->linesize[1]);
106	v = (uint16_t )(pic->data[2] + line pic->linesize[2]);
107	break;
108	}
109
110	t = AV_RL32(src);
111	src += 4;
112	*v++ = t << 6 & 0xFFC0;
113	*y++ = t >> 4 & 0xFFC0;
114	*u++ = t >> 14 & 0xFFC0;
115
116	if (src >= line_end - 1) {
117	*y = 0x80;
118	src++;
119	line_end += stride;
120	y = (uint16_t )(pic->data[0] + line pic->linesize[0]);
121	u = (uint16_t )(pic->data[1] + line pic->linesize[1]);
122	v = (uint16_t )(pic->data[2] + line pic->linesize[2]);
123	break;
124	}
125
126	t = AV_RL32(src);
127	src += 4;
128	*y++ = t << 6 & 0xFFC0;
129	*v++ = t >> 4 & 0xFFC0;
130	*y++ = t >> 14 & 0xFFC0;
131
132	if (src >= line_end - 2) {
133	if (width & 1) {
134	*y = 0x80;
135	src += 2;
136	}
137	line_end += stride;
138	y = (uint16_t )(pic->data[0] + line pic->linesize[0]);
139	u = (uint16_t )(pic->data[1] + line pic->linesize[1]);
140	v = (uint16_t )(pic->data[2] + line pic->linesize[2]);
141	break;
142	}
143	}
144	}
145
146	*got_frame = 1;
147
148	return avpkt->size;
149	}
150
151	AVCodec ff_zero12v_decoder = {
152	.name = "012v",
153	.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
154	.type = AVMEDIA_TYPE_VIDEO,
155	.id = AV_CODEC_ID_012V,
156	.init = zero12v_decode_init,
157	.decode = zero12v_decode_frame,
158	.capabilities = CODEC_CAP_DR1,
159	};