[deb_ffmpeg.git] / ffmpeg / libavcodec / msvideo1.c

/*
 * Microsoft Video-1 Decoder
 * Copyright (c) 2003 The FFmpeg Project
 *
 * 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
 * Microsoft Video-1 Decoder by Mike Melanson (melanson@pcisys.net)
 * For more information about the MS Video-1 format, visit:
 *   http://www.pcisys.net/~melanson/codecs/
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

#define PALETTE_COUNT 256
#define CHECK_STREAM_PTR(n) \
  if ((stream_ptr + n) > s->size ) { \
    av_log(s->avctx, AV_LOG_ERROR, " MS Video-1 warning: stream_ptr out of bounds (%d >= %d)\n", \
      stream_ptr + n, s->size); \
    return; \
  }

typedef struct Msvideo1Context {

    AVCodecContext *avctx;
    AVFrame *frame;

    const unsigned char *buf;
    int size;

    int mode_8bit;  /* if it's not 8-bit, it's 16-bit */

    uint32_t pal[256];
} Msvideo1Context;

static av_cold int msvideo1_decode_init(AVCodecContext *avctx)
{
    Msvideo1Context *s = avctx->priv_data;

    s->avctx = avctx;

    /* figure out the colorspace based on the presence of a palette */
    if (s->avctx->bits_per_coded_sample == 8) {
        s->mode_8bit = 1;
        avctx->pix_fmt = AV_PIX_FMT_PAL8;
        if (avctx->extradata_size >= AVPALETTE_SIZE)
            memcpy(s->pal, avctx->extradata, AVPALETTE_SIZE);
    } else {
        s->mode_8bit = 0;
        avctx->pix_fmt = AV_PIX_FMT_RGB555;
    }

    s->frame = av_frame_alloc();
    if (!s->frame)
        return AVERROR(ENOMEM);

    return 0;
}

static void msvideo1_decode_8bit(Msvideo1Context *s)
{
    int block_ptr, pixel_ptr;
    int total_blocks;
    int pixel_x, pixel_y;  /* pixel width and height iterators */
    int block_x, block_y;  /* block width and height iterators */
    int blocks_wide, blocks_high;  /* width and height in 4x4 blocks */
    int block_inc;
    int row_dec;

    /* decoding parameters */
    int stream_ptr;
    unsigned char byte_a, byte_b;
    unsigned short flags;
    int skip_blocks;
    unsigned char colors[8];
    unsigned char *pixels = s->frame->data[0];
    int stride = s->frame->linesize[0];

    stream_ptr = 0;
    skip_blocks = 0;
    blocks_wide = s->avctx->width / 4;
    blocks_high = s->avctx->height / 4;
    total_blocks = blocks_wide * blocks_high;
    block_inc = 4;
    row_dec = stride + 4;

    for (block_y = blocks_high; block_y > 0; block_y--) {
        block_ptr = ((block_y * 4) - 1) * stride;
        for (block_x = blocks_wide; block_x > 0; block_x--) {
            /* check if this block should be skipped */
            if (skip_blocks) {
                block_ptr += block_inc;
                skip_blocks--;
                total_blocks--;
                continue;
            }

            pixel_ptr = block_ptr;

            /* get the next two bytes in the encoded data stream */
            CHECK_STREAM_PTR(2);
            byte_a = s->buf[stream_ptr++];
            byte_b = s->buf[stream_ptr++];

            /* check if the decode is finished */
            if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0))
                return;
            else if ((byte_b & 0xFC) == 0x84) {
                /* skip code, but don't count the current block */
                skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
            } else if (byte_b < 0x80) {
                /* 2-color encoding */
                flags = (byte_b << 8) | byte_a;

                CHECK_STREAM_PTR(2);
                colors[0] = s->buf[stream_ptr++];
                colors[1] = s->buf[stream_ptr++];

                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
                    for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
                        pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
                    pixel_ptr -= row_dec;
                }
            } else if (byte_b >= 0x90) {
                /* 8-color encoding */
                flags = (byte_b << 8) | byte_a;

                CHECK_STREAM_PTR(8);
                memcpy(colors, &s->buf[stream_ptr], 8);
                stream_ptr += 8;

                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
                    for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
                        pixels[pixel_ptr++] =
                            colors[((pixel_y & 0x2) << 1) +
                                (pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
                    pixel_ptr -= row_dec;
                }
            } else {
                /* 1-color encoding */
                colors[0] = byte_a;

                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
                    for (pixel_x = 0; pixel_x < 4; pixel_x++)
                        pixels[pixel_ptr++] = colors[0];
                    pixel_ptr -= row_dec;
                }
            }

            block_ptr += block_inc;
            total_blocks--;
        }
    }

    /* make the palette available on the way out */
    if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
        memcpy(s->frame->data[1], s->pal, AVPALETTE_SIZE);
}

static void msvideo1_decode_16bit(Msvideo1Context *s)
{
    int block_ptr, pixel_ptr;
    int total_blocks;
    int pixel_x, pixel_y;  /* pixel width and height iterators */
    int block_x, block_y;  /* block width and height iterators */
    int blocks_wide, blocks_high;  /* width and height in 4x4 blocks */
    int block_inc;
    int row_dec;

    /* decoding parameters */
    int stream_ptr;
    unsigned char byte_a, byte_b;
    unsigned short flags;
    int skip_blocks;
    unsigned short colors[8];
    unsigned short *pixels = (unsigned short *)s->frame->data[0];
    int stride = s->frame->linesize[0] / 2;

    stream_ptr = 0;
    skip_blocks = 0;
    blocks_wide = s->avctx->width / 4;
    blocks_high = s->avctx->height / 4;
    total_blocks = blocks_wide * blocks_high;
    block_inc = 4;
    row_dec = stride + 4;

    for (block_y = blocks_high; block_y > 0; block_y--) {
        block_ptr = ((block_y * 4) - 1) * stride;
        for (block_x = blocks_wide; block_x > 0; block_x--) {
            /* check if this block should be skipped */
            if (skip_blocks) {
                block_ptr += block_inc;
                skip_blocks--;
                total_blocks--;
                continue;
            }

            pixel_ptr = block_ptr;

            /* get the next two bytes in the encoded data stream */
            CHECK_STREAM_PTR(2);
            byte_a = s->buf[stream_ptr++];
            byte_b = s->buf[stream_ptr++];

            /* check if the decode is finished */
            if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0)) {
                return;
            } else if ((byte_b & 0xFC) == 0x84) {
                /* skip code, but don't count the current block */
                skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
            } else if (byte_b < 0x80) {
                /* 2- or 8-color encoding modes */
                flags = (byte_b << 8) | byte_a;

                CHECK_STREAM_PTR(4);
                colors[0] = AV_RL16(&s->buf[stream_ptr]);
                stream_ptr += 2;
                colors[1] = AV_RL16(&s->buf[stream_ptr]);
                stream_ptr += 2;

                if (colors[0] & 0x8000) {
                    /* 8-color encoding */
                    CHECK_STREAM_PTR(12);
                    colors[2] = AV_RL16(&s->buf[stream_ptr]);
                    stream_ptr += 2;
                    colors[3] = AV_RL16(&s->buf[stream_ptr]);
                    stream_ptr += 2;
                    colors[4] = AV_RL16(&s->buf[stream_ptr]);
                    stream_ptr += 2;
                    colors[5] = AV_RL16(&s->buf[stream_ptr]);
                    stream_ptr += 2;
                    colors[6] = AV_RL16(&s->buf[stream_ptr]);
                    stream_ptr += 2;
                    colors[7] = AV_RL16(&s->buf[stream_ptr]);
                    stream_ptr += 2;

                    for (pixel_y = 0; pixel_y < 4; pixel_y++) {
                        for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
                            pixels[pixel_ptr++] =
                                colors[((pixel_y & 0x2) << 1) +
                                    (pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
                        pixel_ptr -= row_dec;
                    }
                } else {
                    /* 2-color encoding */
                    for (pixel_y = 0; pixel_y < 4; pixel_y++) {
                        for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
                            pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
                        pixel_ptr -= row_dec;
                    }
                }
            } else {
                /* otherwise, it's a 1-color block */
                colors[0] = (byte_b << 8) | byte_a;

                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
                    for (pixel_x = 0; pixel_x < 4; pixel_x++)
                        pixels[pixel_ptr++] = colors[0];
                    pixel_ptr -= row_dec;
                }
            }

            block_ptr += block_inc;
            total_blocks--;
        }
    }
}

static int msvideo1_decode_frame(AVCodecContext *avctx,
                                void *data, int *got_frame,
                                AVPacket *avpkt)
{
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    Msvideo1Context *s = avctx->priv_data;
    int ret;

    s->buf = buf;
    s->size = buf_size;

    if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
        return ret;

    if (s->mode_8bit) {
        const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);

        if (pal) {
            memcpy(s->pal, pal, AVPALETTE_SIZE);
            s->frame->palette_has_changed = 1;
        }
    }

    if (s->mode_8bit)
        msvideo1_decode_8bit(s);
    else
        msvideo1_decode_16bit(s);

    if ((ret = av_frame_ref(data, s->frame)) < 0)
        return ret;

    *got_frame      = 1;

    /* report that the buffer was completely consumed */
    return buf_size;
}

static av_cold int msvideo1_decode_end(AVCodecContext *avctx)
{
    Msvideo1Context *s = avctx->priv_data;

    av_frame_free(&s->frame);

    return 0;
}

AVCodec ff_msvideo1_decoder = {
    .name           = "msvideo1",
    .long_name      = NULL_IF_CONFIG_SMALL("Microsoft Video 1"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_MSVIDEO1,
    .priv_data_size = sizeof(Msvideo1Context),
    .init           = msvideo1_decode_init,
    .close          = msvideo1_decode_end,
    .decode         = msvideo1_decode_frame,
    .capabilities   = CODEC_CAP_DR1,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Microsoft Video-1 Decoder
	3	* Copyright (c) 2003 The FFmpeg Project
	4	*
	5	* This file is part of FFmpeg.
	6	*
	7	* FFmpeg is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU Lesser General Public
	9	* License as published by the Free Software Foundation; either
	10	* version 2.1 of the License, or (at your option) any later version.
	11	*
	12	* FFmpeg is distributed in the hope that it will be useful,
	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
	18	* License along with FFmpeg; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	20	*/
	21
	22	/**
	23	* @file
	24	* Microsoft Video-1 Decoder by Mike Melanson (melanson@pcisys.net)
	25	* For more information about the MS Video-1 format, visit:
	26	* http://www.pcisys.net/~melanson/codecs/
	27	*
	28	*/
	29
	30	#include <stdio.h>
	31	#include <stdlib.h>
	32	#include <string.h>
	33
	34	#include "libavutil/internal.h"
	35	#include "libavutil/intreadwrite.h"
	36	#include "avcodec.h"
	37	#include "internal.h"
	38
	39	#define PALETTE_COUNT 256
	40	#define CHECK_STREAM_PTR(n) \
	41	if ((stream_ptr + n) > s->size ) { \
	42	av_log(s->avctx, AV_LOG_ERROR, " MS Video-1 warning: stream_ptr out of bounds (%d >= %d)\n", \
	43	stream_ptr + n, s->size); \
	44	return; \
	45	}
	46
	47	typedef struct Msvideo1Context {
	48
	49	AVCodecContext *avctx;
	50	AVFrame *frame;
	51
	52	const unsigned char *buf;
	53	int size;
	54
	55	int mode_8bit; /* if it's not 8-bit, it's 16-bit */
	56
	57	uint32_t pal[256];
	58	} Msvideo1Context;
	59
	60	static av_cold int msvideo1_decode_init(AVCodecContext *avctx)
	61	{
	62	Msvideo1Context *s = avctx->priv_data;
	63
	64	s->avctx = avctx;
65
66	/* figure out the colorspace based on the presence of a palette */
67	if (s->avctx->bits_per_coded_sample == 8) {
68	s->mode_8bit = 1;
69	avctx->pix_fmt = AV_PIX_FMT_PAL8;
70	if (avctx->extradata_size >= AVPALETTE_SIZE)
71	memcpy(s->pal, avctx->extradata, AVPALETTE_SIZE);
72	} else {
73	s->mode_8bit = 0;
74	avctx->pix_fmt = AV_PIX_FMT_RGB555;
75	}
76
77	s->frame = av_frame_alloc();
78	if (!s->frame)
79	return AVERROR(ENOMEM);
80
81	return 0;
82	}
83
84	static void msvideo1_decode_8bit(Msvideo1Context *s)
85	{
86	int block_ptr, pixel_ptr;
87	int total_blocks;
88	int pixel_x, pixel_y; /* pixel width and height iterators */
89	int block_x, block_y; /* block width and height iterators */
90	int blocks_wide, blocks_high; /* width and height in 4x4 blocks */
91	int block_inc;
92	int row_dec;
93
94	/* decoding parameters */
95	int stream_ptr;
96	unsigned char byte_a, byte_b;
97	unsigned short flags;
98	int skip_blocks;
99	unsigned char colors[8];
100	unsigned char *pixels = s->frame->data[0];
101	int stride = s->frame->linesize[0];
102
103	stream_ptr = 0;
104	skip_blocks = 0;
105	blocks_wide = s->avctx->width / 4;
106	blocks_high = s->avctx->height / 4;
107	total_blocks = blocks_wide * blocks_high;
108	block_inc = 4;
109	row_dec = stride + 4;
110
111	for (block_y = blocks_high; block_y > 0; block_y--) {
112	block_ptr = ((block_y * 4) - 1) * stride;
113	for (block_x = blocks_wide; block_x > 0; block_x--) {
114	/* check if this block should be skipped */
115	if (skip_blocks) {
116	block_ptr += block_inc;
117	skip_blocks--;
118	total_blocks--;
119	continue;
120	}
121
122	pixel_ptr = block_ptr;
123
124	/* get the next two bytes in the encoded data stream */
125	CHECK_STREAM_PTR(2);
126	byte_a = s->buf[stream_ptr++];
127	byte_b = s->buf[stream_ptr++];
128
129	/* check if the decode is finished */
130	if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0))
131	return;
132	else if ((byte_b & 0xFC) == 0x84) {
133	/* skip code, but don't count the current block */
134	skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
135	} else if (byte_b < 0x80) {
136	/* 2-color encoding */
137	flags = (byte_b << 8) \| byte_a;
138
139	CHECK_STREAM_PTR(2);
140	colors[0] = s->buf[stream_ptr++];
141	colors[1] = s->buf[stream_ptr++];
142
143	for (pixel_y = 0; pixel_y < 4; pixel_y++) {
144	for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
145	pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
146	pixel_ptr -= row_dec;
147	}
148	} else if (byte_b >= 0x90) {
149	/* 8-color encoding */
150	flags = (byte_b << 8) \| byte_a;
151
152	CHECK_STREAM_PTR(8);
153	memcpy(colors, &s->buf[stream_ptr], 8);
154	stream_ptr += 8;
155
156	for (pixel_y = 0; pixel_y < 4; pixel_y++) {
157	for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
158	pixels[pixel_ptr++] =
159	colors[((pixel_y & 0x2) << 1) +
160	(pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
161	pixel_ptr -= row_dec;
162	}
163	} else {
164	/* 1-color encoding */
165	colors[0] = byte_a;
166
167	for (pixel_y = 0; pixel_y < 4; pixel_y++) {
168	for (pixel_x = 0; pixel_x < 4; pixel_x++)
169	pixels[pixel_ptr++] = colors[0];
170	pixel_ptr -= row_dec;
171	}
172	}
173
174	block_ptr += block_inc;
175	total_blocks--;
176	}
177	}
178
179	/* make the palette available on the way out */
180	if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
181	memcpy(s->frame->data[1], s->pal, AVPALETTE_SIZE);
182	}
183
184	static void msvideo1_decode_16bit(Msvideo1Context *s)
185	{
186	int block_ptr, pixel_ptr;
187	int total_blocks;
188	int pixel_x, pixel_y; /* pixel width and height iterators */
189	int block_x, block_y; /* block width and height iterators */
190	int blocks_wide, blocks_high; /* width and height in 4x4 blocks */
191	int block_inc;
192	int row_dec;
193
194	/* decoding parameters */
195	int stream_ptr;
196	unsigned char byte_a, byte_b;
197	unsigned short flags;
198	int skip_blocks;
199	unsigned short colors[8];
200	unsigned short pixels = (unsigned short )s->frame->data[0];
201	int stride = s->frame->linesize[0] / 2;
202
203	stream_ptr = 0;
204	skip_blocks = 0;
205	blocks_wide = s->avctx->width / 4;
206	blocks_high = s->avctx->height / 4;
207	total_blocks = blocks_wide * blocks_high;
208	block_inc = 4;
209	row_dec = stride + 4;
210
211	for (block_y = blocks_high; block_y > 0; block_y--) {
212	block_ptr = ((block_y * 4) - 1) * stride;
213	for (block_x = blocks_wide; block_x > 0; block_x--) {
214	/* check if this block should be skipped */
215	if (skip_blocks) {
216	block_ptr += block_inc;
217	skip_blocks--;
218	total_blocks--;
219	continue;
220	}
221
222	pixel_ptr = block_ptr;
223
224	/* get the next two bytes in the encoded data stream */
225	CHECK_STREAM_PTR(2);
226	byte_a = s->buf[stream_ptr++];
227	byte_b = s->buf[stream_ptr++];
228
229	/* check if the decode is finished */
230	if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0)) {
231	return;
232	} else if ((byte_b & 0xFC) == 0x84) {
233	/* skip code, but don't count the current block */
234	skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
235	} else if (byte_b < 0x80) {
236	/* 2- or 8-color encoding modes */
237	flags = (byte_b << 8) \| byte_a;
238
239	CHECK_STREAM_PTR(4);
240	colors[0] = AV_RL16(&s->buf[stream_ptr]);
241	stream_ptr += 2;
242	colors[1] = AV_RL16(&s->buf[stream_ptr]);
243	stream_ptr += 2;
244
245	if (colors[0] & 0x8000) {
246	/* 8-color encoding */
247	CHECK_STREAM_PTR(12);
248	colors[2] = AV_RL16(&s->buf[stream_ptr]);
249	stream_ptr += 2;
250	colors[3] = AV_RL16(&s->buf[stream_ptr]);
251	stream_ptr += 2;
252	colors[4] = AV_RL16(&s->buf[stream_ptr]);
253	stream_ptr += 2;
254	colors[5] = AV_RL16(&s->buf[stream_ptr]);
255	stream_ptr += 2;
256	colors[6] = AV_RL16(&s->buf[stream_ptr]);
257	stream_ptr += 2;
258	colors[7] = AV_RL16(&s->buf[stream_ptr]);
259	stream_ptr += 2;
260
261	for (pixel_y = 0; pixel_y < 4; pixel_y++) {
262	for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
263	pixels[pixel_ptr++] =
264	colors[((pixel_y & 0x2) << 1) +
265	(pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
266	pixel_ptr -= row_dec;
267	}
268	} else {
269	/* 2-color encoding */
270	for (pixel_y = 0; pixel_y < 4; pixel_y++) {
271	for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
272	pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
273	pixel_ptr -= row_dec;
274	}
275	}
276	} else {
277	/* otherwise, it's a 1-color block */
278	colors[0] = (byte_b << 8) \| byte_a;
279
280	for (pixel_y = 0; pixel_y < 4; pixel_y++) {
281	for (pixel_x = 0; pixel_x < 4; pixel_x++)
282	pixels[pixel_ptr++] = colors[0];
283	pixel_ptr -= row_dec;
284	}
285	}
286
287	block_ptr += block_inc;
288	total_blocks--;
289	}
290	}
291	}
292
293	static int msvideo1_decode_frame(AVCodecContext *avctx,
294	void data, int got_frame,
295	AVPacket *avpkt)
296	{
297	const uint8_t *buf = avpkt->data;
298	int buf_size = avpkt->size;
299	Msvideo1Context *s = avctx->priv_data;
300	int ret;
301
302	s->buf = buf;
303	s->size = buf_size;
304
305	if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
306	return ret;
307
308	if (s->mode_8bit) {
309	const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
310
311	if (pal) {
312	memcpy(s->pal, pal, AVPALETTE_SIZE);
313	s->frame->palette_has_changed = 1;
314	}
315	}
316
317	if (s->mode_8bit)
318	msvideo1_decode_8bit(s);
319	else
320	msvideo1_decode_16bit(s);
321
322	if ((ret = av_frame_ref(data, s->frame)) < 0)
323	return ret;
324
325	*got_frame = 1;
326
327	/* report that the buffer was completely consumed */
328	return buf_size;
329	}
330
331	static av_cold int msvideo1_decode_end(AVCodecContext *avctx)
332	{
333	Msvideo1Context *s = avctx->priv_data;
334
335	av_frame_free(&s->frame);
336
337	return 0;
338	}
339
340	AVCodec ff_msvideo1_decoder = {
341	.name = "msvideo1",
342	.long_name = NULL_IF_CONFIG_SMALL("Microsoft Video 1"),
343	.type = AVMEDIA_TYPE_VIDEO,
344	.id = AV_CODEC_ID_MSVIDEO1,
345	.priv_data_size = sizeof(Msvideo1Context),
346	.init = msvideo1_decode_init,
347	.close = msvideo1_decode_end,
348	.decode = msvideo1_decode_frame,
349	.capabilities = CODEC_CAP_DR1,
350	};