[deb_ffmpeg.git] / ffmpeg / libavcodec / libutvideodec.cpp

/*
 * Copyright (c) 2011 Derek Buitenhuis
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation;
 * version 2 of the License.
 *
 * 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU 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
 * Known FOURCCs:
 *     'ULY0' (YCbCr 4:2:0), 'ULY2' (YCbCr 4:2:2), 'ULRG' (RGB), 'ULRA' (RGBA),
 *     'ULH0' (YCbCr 4:2:0 BT.709), 'ULH2' (YCbCr 4:2:2 BT.709)
 */

extern "C" {
#include "avcodec.h"
}

#include "libutvideo.h"
#include "get_bits.h"

static av_cold int utvideo_decode_init(AVCodecContext *avctx)
{
    UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
    UtVideoExtra info;
    int format;
    int begin_ret;

    if (avctx->extradata_size != 4*4) {
        av_log(avctx, AV_LOG_ERROR, "Extradata size mismatch.\n");
        return -1;
    }

    /* Read extradata */
    info.version = AV_RL32(avctx->extradata);
    info.original_format = AV_RL32(avctx->extradata + 4);
    info.frameinfo_size = AV_RL32(avctx->extradata + 8);
    info.flags = AV_RL32(avctx->extradata + 12);

    /* Pick format based on FOURCC */
    switch (avctx->codec_tag) {
#ifdef UTV_BT709
    case MKTAG('U', 'L', 'H', '0'):
        avctx->pix_fmt = AV_PIX_FMT_YUV420P;
        avctx->colorspace = AVCOL_SPC_BT709;
        format = UTVF_YV12;
        break;
    case MKTAG('U', 'L', 'H', '2'):
        avctx->pix_fmt = AV_PIX_FMT_YUYV422;
        avctx->colorspace = AVCOL_SPC_BT709;
        format = UTVF_YUY2;
        break;
#endif
    case MKTAG('U', 'L', 'Y', '0'):
        avctx->pix_fmt = AV_PIX_FMT_YUV420P;
        format = UTVF_YV12;
        break;
    case MKTAG('U', 'L', 'Y', '2'):
        avctx->pix_fmt = AV_PIX_FMT_YUYV422;
        format = UTVF_YUY2;
        break;
    case MKTAG('U', 'L', 'R', 'G'):
        avctx->pix_fmt = AV_PIX_FMT_BGR24;
        format = UTVF_NFCC_BGR_BU;
        break;
    case MKTAG('U', 'L', 'R', 'A'):
        avctx->pix_fmt = AV_PIX_FMT_RGB32;
        format = UTVF_NFCC_BGRA_BU;
        break;
    default:
        av_log(avctx, AV_LOG_ERROR,
              "Not a Ut Video FOURCC: %X\n", avctx->codec_tag);
        return -1;
    }

    /* Only allocate the buffer once */
    utv->buf_size = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
    utv->buffer = (uint8_t *)av_malloc(utv->buf_size * sizeof(uint8_t));

    if (utv->buffer == NULL) {
        av_log(avctx, AV_LOG_ERROR, "Unable to allocate output buffer.\n");
        return -1;
    }

    /* Allocate the output frame */
    avctx->coded_frame = av_frame_alloc();

    /* Ut Video only supports 8-bit */
    avctx->bits_per_raw_sample = 8;

    /* Is it interlaced? */
    avctx->coded_frame->interlaced_frame = info.flags & 0x800 ? 1 : 0;

    /* Apparently Ut Video doesn't store this info... */
    avctx->coded_frame->top_field_first = 1;

    /*
     * Create a Ut Video instance. Since the function wants
     * an "interface name" string, pass it the name of the lib.
     */
    utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec");

    /* Initialize Decoding */
    begin_ret = utv->codec->DecodeBegin(format, avctx->width, avctx->height,
                            CBGROSSWIDTH_WINDOWS, &info, sizeof(UtVideoExtra));

    /* Check to see if the decoder initlized properly */
    if (begin_ret != 0) {
        av_log(avctx, AV_LOG_ERROR,
               "Could not initialize decoder: %d\n", begin_ret);
        return -1;
    }

    return 0;
}

static int utvideo_decode_frame(AVCodecContext *avctx, void *data,
                                int *got_frame, AVPacket *avpkt)
{
    UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
    AVFrame *pic = avctx->coded_frame;
    int w = avctx->width, h = avctx->height;

    /* Set flags */
    pic->reference = 0;
    pic->pict_type = AV_PICTURE_TYPE_I;
    pic->key_frame = 1;

    /* Decode the frame */
    utv->codec->DecodeFrame(utv->buffer, avpkt->data, true);

    /* Set the output data depending on the colorspace */
    switch (avctx->pix_fmt) {
    case AV_PIX_FMT_YUV420P:
        pic->linesize[0] = w;
        pic->linesize[1] = pic->linesize[2] = w / 2;
        pic->data[0] = utv->buffer;
        pic->data[2] = utv->buffer + (w * h);
        pic->data[1] = pic->data[2] + (w * h / 4);
        break;
    case AV_PIX_FMT_YUYV422:
        pic->linesize[0] = w * 2;
        pic->data[0] = utv->buffer;
        break;
    case AV_PIX_FMT_BGR24:
    case AV_PIX_FMT_RGB32:
        /* Make the linesize negative, since Ut Video uses bottom-up BGR */
        pic->linesize[0] = -1 * w * (avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4);
        pic->data[0] = utv->buffer + utv->buf_size + pic->linesize[0];
        break;
    }

    *got_frame = 1;
    av_frame_move_ref((AVFrame*)data, pic);

    return avpkt->size;
}

static av_cold int utvideo_decode_close(AVCodecContext *avctx)
{
    UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;

    /* Free output */
    av_frame_free(&avctx->coded_frame);
    av_freep(&utv->buffer);

    /* Finish decoding and clean up the instance */
    utv->codec->DecodeEnd();
    CCodec::DeleteInstance(utv->codec);

    return 0;
}

AVCodec ff_libutvideo_decoder = {
    "libutvideo",
    NULL_IF_CONFIG_SMALL("Ut Video"),
    AVMEDIA_TYPE_VIDEO,
    AV_CODEC_ID_UTVIDEO,
    0,    //capabilities
    NULL, //supported_framerates
    NULL, //pix_fmts
    NULL, //supported_samplerates
    NULL, //sample_fmts
    NULL, //channel_layouts
    0,    //max_lowres
    NULL, //priv_class
    NULL, //profiles
    sizeof(UtVideoContext),
    NULL, //next
    NULL, //init_thread_copy
    NULL, //update_thread_context
    NULL, //defaults
    NULL, //init_static_data
    utvideo_decode_init,
    NULL, //encode
    NULL, //encode2
    utvideo_decode_frame,
    utvideo_decode_close,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Copyright (c) 2011 Derek Buitenhuis
	3	*
	4	* This file is part of FFmpeg.
	5	*
	6	* FFmpeg is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public
	8	* License as published by the Free Software Foundation;
	9	* version 2 of the License.
	10	*
	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	* General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU 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
	19	*/
	20
	21	/**
	22	* @file
	23	* Known FOURCCs:
	24	* 'ULY0' (YCbCr 4:2:0), 'ULY2' (YCbCr 4:2:2), 'ULRG' (RGB), 'ULRA' (RGBA),
	25	* 'ULH0' (YCbCr 4:2:0 BT.709), 'ULH2' (YCbCr 4:2:2 BT.709)
	26	*/
	27
	28	extern "C" {
	29	#include "avcodec.h"
	30	}
	31
	32	#include "libutvideo.h"
	33	#include "get_bits.h"
	34
	35	static av_cold int utvideo_decode_init(AVCodecContext *avctx)
	36	{
	37	UtVideoContext utv = (UtVideoContext )avctx->priv_data;
	38	UtVideoExtra info;
	39	int format;
	40	int begin_ret;
	41
	42	if (avctx->extradata_size != 4*4) {
	43	av_log(avctx, AV_LOG_ERROR, "Extradata size mismatch.\n");
	44	return -1;
	45	}
	46
	47	/* Read extradata */
	48	info.version = AV_RL32(avctx->extradata);
	49	info.original_format = AV_RL32(avctx->extradata + 4);
	50	info.frameinfo_size = AV_RL32(avctx->extradata + 8);
	51	info.flags = AV_RL32(avctx->extradata + 12);
	52
	53	/* Pick format based on FOURCC */
	54	switch (avctx->codec_tag) {
	55	#ifdef UTV_BT709
	56	case MKTAG('U', 'L', 'H', '0'):
	57	avctx->pix_fmt = AV_PIX_FMT_YUV420P;
	58	avctx->colorspace = AVCOL_SPC_BT709;
	59	format = UTVF_YV12;
	60	break;
	61	case MKTAG('U', 'L', 'H', '2'):
	62	avctx->pix_fmt = AV_PIX_FMT_YUYV422;
	63	avctx->colorspace = AVCOL_SPC_BT709;
	64	format = UTVF_YUY2;
65	break;
66	#endif
67	case MKTAG('U', 'L', 'Y', '0'):
68	avctx->pix_fmt = AV_PIX_FMT_YUV420P;
69	format = UTVF_YV12;
70	break;
71	case MKTAG('U', 'L', 'Y', '2'):
72	avctx->pix_fmt = AV_PIX_FMT_YUYV422;
73	format = UTVF_YUY2;
74	break;
75	case MKTAG('U', 'L', 'R', 'G'):
76	avctx->pix_fmt = AV_PIX_FMT_BGR24;
77	format = UTVF_NFCC_BGR_BU;
78	break;
79	case MKTAG('U', 'L', 'R', 'A'):
80	avctx->pix_fmt = AV_PIX_FMT_RGB32;
81	format = UTVF_NFCC_BGRA_BU;
82	break;
83	default:
84	av_log(avctx, AV_LOG_ERROR,
85	"Not a Ut Video FOURCC: %X\n", avctx->codec_tag);
86	return -1;
87	}
88
89	/* Only allocate the buffer once */
90	utv->buf_size = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
91	utv->buffer = (uint8_t )av_malloc(utv->buf_size sizeof(uint8_t));
92
93	if (utv->buffer == NULL) {
94	av_log(avctx, AV_LOG_ERROR, "Unable to allocate output buffer.\n");
95	return -1;
96	}
97
98	/* Allocate the output frame */
99	avctx->coded_frame = av_frame_alloc();
100
101	/* Ut Video only supports 8-bit */
102	avctx->bits_per_raw_sample = 8;
103
104	/* Is it interlaced? */
105	avctx->coded_frame->interlaced_frame = info.flags & 0x800 ? 1 : 0;
106
107	/* Apparently Ut Video doesn't store this info... */
108	avctx->coded_frame->top_field_first = 1;
109
110	/*
111	* Create a Ut Video instance. Since the function wants
112	* an "interface name" string, pass it the name of the lib.
113	*/
114	utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec");
115
116	/* Initialize Decoding */
117	begin_ret = utv->codec->DecodeBegin(format, avctx->width, avctx->height,
118	CBGROSSWIDTH_WINDOWS, &info, sizeof(UtVideoExtra));
119
120	/* Check to see if the decoder initlized properly */
121	if (begin_ret != 0) {
122	av_log(avctx, AV_LOG_ERROR,
123	"Could not initialize decoder: %d\n", begin_ret);
124	return -1;
125	}
126
127	return 0;
128	}
129
130	static int utvideo_decode_frame(AVCodecContext avctx, void data,
131	int got_frame, AVPacket avpkt)
132	{
133	UtVideoContext utv = (UtVideoContext )avctx->priv_data;
134	AVFrame *pic = avctx->coded_frame;
135	int w = avctx->width, h = avctx->height;
136
137	/* Set flags */
138	pic->reference = 0;
139	pic->pict_type = AV_PICTURE_TYPE_I;
140	pic->key_frame = 1;
141
142	/* Decode the frame */
143	utv->codec->DecodeFrame(utv->buffer, avpkt->data, true);
144
145	/* Set the output data depending on the colorspace */
146	switch (avctx->pix_fmt) {
147	case AV_PIX_FMT_YUV420P:
148	pic->linesize[0] = w;
149	pic->linesize[1] = pic->linesize[2] = w / 2;
150	pic->data[0] = utv->buffer;
151	pic->data[2] = utv->buffer + (w * h);
152	pic->data[1] = pic->data[2] + (w * h / 4);
153	break;
154	case AV_PIX_FMT_YUYV422:
155	pic->linesize[0] = w * 2;
156	pic->data[0] = utv->buffer;
157	break;
158	case AV_PIX_FMT_BGR24:
159	case AV_PIX_FMT_RGB32:
160	/* Make the linesize negative, since Ut Video uses bottom-up BGR */
161	pic->linesize[0] = -1 * w * (avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4);
162	pic->data[0] = utv->buffer + utv->buf_size + pic->linesize[0];
163	break;
164	}
165
166	*got_frame = 1;
167	av_frame_move_ref((AVFrame*)data, pic);
168
169	return avpkt->size;
170	}
171
172	static av_cold int utvideo_decode_close(AVCodecContext *avctx)
173	{
174	UtVideoContext utv = (UtVideoContext )avctx->priv_data;
175
176	/* Free output */
177	av_frame_free(&avctx->coded_frame);
178	av_freep(&utv->buffer);
179
180	/* Finish decoding and clean up the instance */
181	utv->codec->DecodeEnd();
182	CCodec::DeleteInstance(utv->codec);
183
184	return 0;
185	}
186
187	AVCodec ff_libutvideo_decoder = {
188	"libutvideo",
189	NULL_IF_CONFIG_SMALL("Ut Video"),
190	AVMEDIA_TYPE_VIDEO,
191	AV_CODEC_ID_UTVIDEO,
192	0, //capabilities
193	NULL, //supported_framerates
194	NULL, //pix_fmts
195	NULL, //supported_samplerates
196	NULL, //sample_fmts
197	NULL, //channel_layouts
198	0, //max_lowres
199	NULL, //priv_class
200	NULL, //profiles
201	sizeof(UtVideoContext),
202	NULL, //next
203	NULL, //init_thread_copy
204	NULL, //update_thread_context
205	NULL, //defaults
206	NULL, //init_static_data
207	utvideo_decode_init,
208	NULL, //encode
209	NULL, //encode2
210	utvideo_decode_frame,
211	utvideo_decode_close,
212	};