path: root/libavcodec/tdsc.c (plain)
blob: 4182404cf019cc364b11e28c8923ce208e52d451

1	/*
2	* TDSC decoder
3	* Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
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	* TDSC decoder
25	*
26	* Fourcc: TSDC
27	*
28	* TDSC is very simple. It codes picture by tiles, storing them in raw BGR24
29	* format or compressing them in JPEG. Frames can be full pictures or just
30	* updates to the previous frame. Cursor is found in its own frame or at the
31	* bottom of the picture. Every frame is then packed with zlib.
32	*
33	* Supports: BGR24
34	*/
35
36	#include <stdint.h>
37	#include <zlib.h>
38
39	#include "libavutil/imgutils.h"
40
41	#include "avcodec.h"
42	#include "bytestream.h"
43	#include "internal.h"
44
45	#define BITMAPINFOHEADER_SIZE 0x28
46	#define TDSF_HEADER_SIZE 0x56
47	#define TDSB_HEADER_SIZE 0x08
48
49	typedef struct TDSCContext {
50	AVCodecContext *jpeg_avctx; // wrapper context for MJPEG
51
52	int width, height;
53	GetByteContext gbc;
54
55	AVFrame *refframe; // full decoded frame (without cursor)
56	AVFrame *jpgframe; // decoded JPEG tile
57	uint8_t *tilebuffer; // buffer containing tile data
58
59	/* zlib interaction */
60	uint8_t *deflatebuffer;
61	uLongf deflatelen;
62
63	/* All that is cursor */
64	uint8_t *cursor;
65	int cursor_stride;
66	int cursor_w, cursor_h, cursor_x, cursor_y;
67	int cursor_hot_x, cursor_hot_y;
68	} TDSCContext;
69
70	/* 1 byte bits, 1 byte planes, 2 bytes format (probably) */
71	enum TDSCCursorFormat {
72	CUR_FMT_MONO = 0x01010004,
73	CUR_FMT_BGRA = 0x20010004,
74	CUR_FMT_RGBA = 0x20010008,
75	};
76
77	static av_cold int tdsc_close(AVCodecContext *avctx)
78	{
79	TDSCContext *ctx = avctx->priv_data;
80
81	av_frame_free(&ctx->refframe);
82	av_frame_free(&ctx->jpgframe);
83	av_freep(&ctx->deflatebuffer);
84	av_freep(&ctx->tilebuffer);
85	av_freep(&ctx->cursor);
86	avcodec_free_context(&ctx->jpeg_avctx);
87
88	return 0;
89	}
90
91	static av_cold int tdsc_init(AVCodecContext *avctx)
92	{
93	TDSCContext *ctx = avctx->priv_data;
94	const AVCodec *codec;
95	int ret;
96
97	avctx->pix_fmt = AV_PIX_FMT_BGR24;
98
99	/* These needs to be set to estimate buffer and frame size */
100	if (!(avctx->width && avctx->height)) {
101	av_log(avctx, AV_LOG_ERROR, "Video size not set.\n");
102	return AVERROR_INVALIDDATA;
103	}
104
105	/* This value should be large enough for a RAW-only frame plus headers */
106	ctx->deflatelen = avctx->width * avctx->height * (3 + 1);
107	ret = av_reallocp(&ctx->deflatebuffer, ctx->deflatelen);
108	if (ret < 0)
109	return ret;
110
111	/* Allocate reference and JPEG frame */
112	ctx->refframe = av_frame_alloc();
113	ctx->jpgframe = av_frame_alloc();
114	if (!ctx->refframe || !ctx->jpgframe)
115	return AVERROR(ENOMEM);
116
117	/* Prepare everything needed for JPEG decoding */
118	codec = avcodec_find_decoder(AV_CODEC_ID_MJPEG);
119	if (!codec)
120	return AVERROR_BUG;
121	ctx->jpeg_avctx = avcodec_alloc_context3(codec);
122	if (!ctx->jpeg_avctx)
123	return AVERROR(ENOMEM);
124	ctx->jpeg_avctx->flags = avctx->flags;
125	ctx->jpeg_avctx->flags2 = avctx->flags2;
126	ctx->jpeg_avctx->dct_algo = avctx->dct_algo;
127	ctx->jpeg_avctx->idct_algo = avctx->idct_algo;
128	ret = ff_codec_open2_recursive(ctx->jpeg_avctx, codec, NULL);
129	if (ret < 0)
130	return ret;
131
132	/* Set the output pixel format on the reference frame */
133	ctx->refframe->format = avctx->pix_fmt;
134
135	return 0;
136	}
137
138	#define APPLY_ALPHA(src, new, alpha) \
139	src = (src * (256 - alpha) + new * alpha) >> 8
140
141	/* Paint a region over a buffer, without drawing out of its bounds. */
142	static void tdsc_paint_cursor(AVCodecContext *avctx, uint8_t *dst, int stride)
143	{
144	TDSCContext *ctx = avctx->priv_data;
145	const uint8_t *cursor = ctx->cursor;
146	int x = ctx->cursor_x - ctx->cursor_hot_x;
147	int y = ctx->cursor_y - ctx->cursor_hot_y;
148	int w = ctx->cursor_w;
149	int h = ctx->cursor_h;
150	int i, j;
151
152	if (!ctx->cursor)
153	return;
154
155	if (x + w > ctx->width)
156	w = ctx->width - x;
157	if (y + h > ctx->height)
158	h = ctx->height - y;
159	if (x < 0) {
160	w += x;
161	cursor += -x * 4;
162	} else {
163	dst += x * 3;
164	}
165	if (y < 0) {
166	h += y;
167	cursor += -y * ctx->cursor_stride;
168	} else {
169	dst += y * stride;
170	}
171	if (w < 0 || h < 0)
172	return;
173
174	for (j = 0; j < h; j++) {
175	for (i = 0; i < w; i++) {
176	uint8_t alpha = cursor[i * 4];
177	APPLY_ALPHA(dst[i * 3 + 0], cursor[i * 4 + 1], alpha);
178	APPLY_ALPHA(dst[i * 3 + 1], cursor[i * 4 + 2], alpha);
179	APPLY_ALPHA(dst[i * 3 + 2], cursor[i * 4 + 3], alpha);
180	}
181	dst += stride;
182	cursor += ctx->cursor_stride;
183	}
184	}
185
186	/* Load cursor data and store it in ABGR mode. */
187	static int tdsc_load_cursor(AVCodecContext *avctx)
188	{
189	TDSCContext *ctx = avctx->priv_data;
190	int i, j, k, ret, bits, cursor_fmt;
191	uint8_t *dst;
192
193	ctx->cursor_hot_x = bytestream2_get_le16(&ctx->gbc);
194	ctx->cursor_hot_y = bytestream2_get_le16(&ctx->gbc);
195	ctx->cursor_w = bytestream2_get_le16(&ctx->gbc);
196	ctx->cursor_h = bytestream2_get_le16(&ctx->gbc);
197
198	ctx->cursor_stride = FFALIGN(ctx->cursor_w, 32) * 4;
199	cursor_fmt = bytestream2_get_le32(&ctx->gbc);
200
201	if (ctx->cursor_x >= avctx->width || ctx->cursor_y >= avctx->height) {
202	av_log(avctx, AV_LOG_ERROR,
203	"Invalid cursor position (%d.%d outside %dx%d).\n",
204	ctx->cursor_x, ctx->cursor_y, avctx->width, avctx->height);
205	return AVERROR_INVALIDDATA;
206	}
207	if (ctx->cursor_w < 1 || ctx->cursor_w > 256 ||
208	ctx->cursor_h < 1 || ctx->cursor_h > 256) {
209	av_log(avctx, AV_LOG_ERROR,
210	"Invalid cursor dimensions %dx%d.\n",
211	ctx->cursor_w, ctx->cursor_h);
212	return AVERROR_INVALIDDATA;
213	}
214	if (ctx->cursor_hot_x > ctx->cursor_w ||
215	ctx->cursor_hot_y > ctx->cursor_h) {
216	av_log(avctx, AV_LOG_WARNING, "Invalid hotspot position %d.%d.\n",
217	ctx->cursor_hot_x, ctx->cursor_hot_y);
218	ctx->cursor_hot_x = FFMIN(ctx->cursor_hot_x, ctx->cursor_w - 1);
219	ctx->cursor_hot_y = FFMIN(ctx->cursor_hot_y, ctx->cursor_h - 1);
220	}
221
222	ret = av_reallocp(&ctx->cursor, ctx->cursor_stride * ctx->cursor_h);
223	if (ret < 0) {
224	av_log(avctx, AV_LOG_ERROR, "Cannot allocate cursor buffer.\n");
225	return ret;
226	}
227
228	dst = ctx->cursor;
229	/* here data is packed in BE */
230	switch (cursor_fmt) {
231	case CUR_FMT_MONO:
232	for (j = 0; j < ctx->cursor_h; j++) {
233	for (i = 0; i < ctx->cursor_w; i += 32) {
234	bits = bytestream2_get_be32(&ctx->gbc);
235	for (k = 0; k < 32; k++) {
236	dst[0] = !!(bits & 0x80000000);
237	dst += 4;
238	bits <<= 1;
239	}
240	}
241	dst += ctx->cursor_stride - ctx->cursor_w * 4;
242	}
243
244	dst = ctx->cursor;
245	for (j = 0; j < ctx->cursor_h; j++) {
246	for (i = 0; i < ctx->cursor_w; i += 32) {
247	bits = bytestream2_get_be32(&ctx->gbc);
248	for (k = 0; k < 32; k++) {
249	int mask_bit = !!(bits & 0x80000000);
250	switch (dst[0] * 2 + mask_bit) {
251	case 0:
252	dst[0] = 0xFF;
253	dst[1] = 0x00;
254	dst[2] = 0x00;
255	dst[3] = 0x00;
256	break;
257	case 1:
258	dst[0] = 0xFF;
259	dst[1] = 0xFF;
260	dst[2] = 0xFF;
261	dst[3] = 0xFF;
262	break;
263	default:
264	dst[0] = 0x00;
265	dst[1] = 0x00;
266	dst[2] = 0x00;
267	dst[3] = 0x00;
268	}
269	dst += 4;
270	bits <<= 1;
271	}
272	}
273	dst += ctx->cursor_stride - ctx->cursor_w * 4;
274	}
275	break;
276	case CUR_FMT_BGRA:
277	case CUR_FMT_RGBA:
278	/* Skip monochrome version of the cursor */
279	bytestream2_skip(&ctx->gbc,
280	ctx->cursor_h * (FFALIGN(ctx->cursor_w, 32) >> 3));
281	if (cursor_fmt & 8) { // RGBA -> ABGR
282	for (j = 0; j < ctx->cursor_h; j++) {
283	for (i = 0; i < ctx->cursor_w; i++) {
284	int val = bytestream2_get_be32(&ctx->gbc);
285	*dst++ = val >> 24;
286	*dst++ = val >> 16;
287	*dst++ = val >> 8;
288	*dst++ = val >> 0;
289	}
290	dst += ctx->cursor_stride - ctx->cursor_w * 4;
291	}
292	} else { // BGRA -> ABGR
293	for (j = 0; j < ctx->cursor_h; j++) {
294	for (i = 0; i < ctx->cursor_w; i++) {
295	int val = bytestream2_get_be32(&ctx->gbc);
296	*dst++ = val >> 0;
297	*dst++ = val >> 24;
298	*dst++ = val >> 16;
299	*dst++ = val >> 8;
300	}
301	dst += ctx->cursor_stride - ctx->cursor_w * 4;
302	}
303	}
304	break;
305	default:
306	avpriv_request_sample(avctx, "Cursor format %08x", cursor_fmt);
307	return AVERROR_PATCHWELCOME;
308	}
309
310	return 0;
311	}
312
313	/* Convert a single YUV pixel to RGB. */
314	static inline void tdsc_yuv2rgb(uint8_t *out, int Y, int U, int V)
315	{
316	out[0] = av_clip_uint8(Y + ( 91881 * V + 32768 >> 16));
317	out[1] = av_clip_uint8(Y + (-22554 * U - 46802 * V + 32768 >> 16));
318	out[2] = av_clip_uint8(Y + (116130 * U + 32768 >> 16));
319	}
320
321	/* Convert a YUV420 buffer to a RGB buffer. */
322	static av_always_inline void tdsc_blit(uint8_t *dst, int dst_stride,
323	const uint8_t *srcy, int srcy_stride,
324	const uint8_t *srcu, const uint8_t *srcv,
325	int srcuv_stride, int width, int height)
326	{
327	int col, line;
328	for (line = 0; line < height; line++) {
329	for (col = 0; col < width; col++)
330	tdsc_yuv2rgb(dst + col * 3, srcy[col],
331	srcu[col >> 1] - 128, srcv[col >> 1] - 128);
332
333	dst += dst_stride;
334	srcy += srcy_stride;
335	srcu += srcuv_stride * (line & 1);
336	srcv += srcuv_stride * (line & 1);
337	}
338	}
339
340	/* Invoke the MJPEG decoder to decode the tile. */
341	static int tdsc_decode_jpeg_tile(AVCodecContext *avctx, int tile_size,
342	int x, int y, int w, int h)
343	{
344	TDSCContext *ctx = avctx->priv_data;
345	AVPacket jpkt;
346	int ret;
347
348	/* Prepare a packet and send to the MJPEG decoder */
349	av_init_packet(&jpkt);
350	jpkt.data = ctx->tilebuffer;
351	jpkt.size = tile_size;
352
353	ret = avcodec_send_packet(ctx->jpeg_avctx, &jpkt);
354	if (ret < 0) {
355	av_log(avctx, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
356	return ret;
357	}
358
359	ret = avcodec_receive_frame(ctx->jpeg_avctx, ctx->jpgframe);
360	if (ret < 0 || ctx->jpgframe->format != AV_PIX_FMT_YUVJ420P) {
361	av_log(avctx, AV_LOG_ERROR,
362	"JPEG decoding error (%d).\n", ret);
363
364	/* Normally skip, error if explode */
365	if (avctx->err_recognition & AV_EF_EXPLODE)
366	return AVERROR_INVALIDDATA;
367	else
368	return 0;
369	}
370
371	/* Let's paint onto the buffer */
372	tdsc_blit(ctx->refframe->data[0] + x * 3 + ctx->refframe->linesize[0] * y,
373	ctx->refframe->linesize[0],
374	ctx->jpgframe->data[0], ctx->jpgframe->linesize[0],
375	ctx->jpgframe->data[1], ctx->jpgframe->data[2],
376	ctx->jpgframe->linesize[1], w, h);
377
378	av_frame_unref(ctx->jpgframe);
379
380	return 0;
381	}
382
383	/* Parse frame and either copy data or decode JPEG. */
384	static int tdsc_decode_tiles(AVCodecContext *avctx, int number_tiles)
385	{
386	TDSCContext *ctx = avctx->priv_data;
387	int i;
388
389	/* Iterate over the number of tiles */
390	for (i = 0; i < number_tiles; i++) {
391	int tile_size;
392	int tile_mode;
393	int x, y, w, h;
394	int ret;
395
396	if (bytestream2_get_bytes_left(&ctx->gbc) < 4 ||
397	bytestream2_get_le32(&ctx->gbc) != MKTAG('T','D','S','B') ||
398	bytestream2_get_bytes_left(&ctx->gbc) < TDSB_HEADER_SIZE - 4) {
399	av_log(avctx, AV_LOG_ERROR, "TDSB tag is too small.\n");
400	return AVERROR_INVALIDDATA;
401	}
402
403	tile_size = bytestream2_get_le32(&ctx->gbc);
404	if (bytestream2_get_bytes_left(&ctx->gbc) < tile_size)
405	return AVERROR_INVALIDDATA;
406
407	tile_mode = bytestream2_get_le32(&ctx->gbc);
408	bytestream2_skip(&ctx->gbc, 4); // unknown
409	x = bytestream2_get_le32(&ctx->gbc);
410	y = bytestream2_get_le32(&ctx->gbc);
411	w = bytestream2_get_le32(&ctx->gbc) - x;
412	h = bytestream2_get_le32(&ctx->gbc) - y;
413
414	if (x >= ctx->width || y >= ctx->height) {
415	av_log(avctx, AV_LOG_ERROR,
416	"Invalid tile position (%d.%d outside %dx%d).\n",
417	x, y, ctx->width, ctx->height);
418	return AVERROR_INVALIDDATA;
419	}
420	if (x + w > ctx->width || y + h > ctx->height) {
421	av_log(avctx, AV_LOG_ERROR,
422	"Invalid tile size %dx%d\n", w, h);
423	return AVERROR_INVALIDDATA;
424	}
425
426	ret = av_reallocp(&ctx->tilebuffer, tile_size);
427	if (!ctx->tilebuffer)
428	return ret;
429
430	bytestream2_get_buffer(&ctx->gbc, ctx->tilebuffer, tile_size);
431
432	if (tile_mode == MKTAG('G','E','P','J')) {
433	/* Decode JPEG tile and copy it in the reference frame */
434	ret = tdsc_decode_jpeg_tile(avctx, tile_size, x, y, w, h);
435	if (ret < 0)
436	return ret;
437	} else if (tile_mode == MKTAG(' ','W','A','R')) {
438	/* Just copy the buffer to output */
439	av_image_copy_plane(ctx->refframe->data[0] + x * 3 +
440	ctx->refframe->linesize[0] * y,
441	ctx->refframe->linesize[0], ctx->tilebuffer,
442	w * 3, w * 3, h);
443	} else {
444	av_log(avctx, AV_LOG_ERROR, "Unknown tile type %08x.\n", tile_mode);
445	return AVERROR_INVALIDDATA;
446	}
447	av_log(avctx, AV_LOG_DEBUG, "Tile %d, %dx%d (%d.%d)\n", i, w, h, x, y);
448	}
449
450	return 0;
451	}
452
453	static int tdsc_parse_tdsf(AVCodecContext *avctx, int number_tiles)
454	{
455	TDSCContext *ctx = avctx->priv_data;
456	int ret, w, h, init_refframe = !ctx->refframe->data[0];
457
458	/* BITMAPINFOHEADER
459	* http://msdn.microsoft.com/en-us/library/windows/desktop/dd183376.aspx */
460	if (bytestream2_get_le32(&ctx->gbc) != BITMAPINFOHEADER_SIZE)
461	return AVERROR_INVALIDDATA;
462
463	/* Store size, but wait for context reinit before updating avctx */
464	w = bytestream2_get_le32(&ctx->gbc);
465	h = -bytestream2_get_le32(&ctx->gbc);
466
467	if (bytestream2_get_le16(&ctx->gbc) != 1 || // 1 plane
468	bytestream2_get_le16(&ctx->gbc) != 24) // BGR24
469	return AVERROR_INVALIDDATA;
470
471	bytestream2_skip(&ctx->gbc, 24); // unused fields
472
473	/* Update sizes */
474	if (avctx->width != w || avctx->height != h) {
475	av_log(avctx, AV_LOG_DEBUG, "Size update %dx%d -> %d%d.\n",
476	avctx->width, avctx->height, ctx->width, ctx->height);
477	ret = ff_set_dimensions(avctx, w, h);
478	if (ret < 0)
479	return ret;
480	init_refframe = 1;
481	}
482	ctx->refframe->width = ctx->width = w;
483	ctx->refframe->height = ctx->height = h;
484
485	/* Allocate the reference frame if not already done or on size change */
486	if (init_refframe) {
487	ret = av_frame_get_buffer(ctx->refframe, 32);
488	if (ret < 0)
489	return ret;
490	}
491
492	/* Decode all tiles in a frame */
493	return tdsc_decode_tiles(avctx, number_tiles);
494	}
495
496	static int tdsc_parse_dtsm(AVCodecContext *avctx)
497	{
498	TDSCContext *ctx = avctx->priv_data;
499	int ret;
500	int action = bytestream2_get_le32(&ctx->gbc);
501
502	bytestream2_skip(&ctx->gbc, 4); // some kind of ID or version maybe?
503
504	if (action == 2 || action == 3) {
505	/* Load cursor coordinates */
506	ctx->cursor_x = bytestream2_get_le32(&ctx->gbc);
507	ctx->cursor_y = bytestream2_get_le32(&ctx->gbc);
508
509	/* Load a full cursor sprite */
510	if (action == 3) {
511	ret = tdsc_load_cursor(avctx);
512	/* Do not consider cursor errors fatal unless in explode mode */
513	if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
514	return ret;
515	}
516	} else {
517	avpriv_request_sample(avctx, "Cursor action %d", action);
518	}
519
520	return 0;
521	}
522
523	static int tdsc_decode_frame(AVCodecContext *avctx, void *data,
524	int *got_frame, AVPacket *avpkt)
525	{
526	TDSCContext *ctx = avctx->priv_data;
527	AVFrame *frame = data;
528	int ret, tag_header, keyframe = 0;
529	uLongf dlen;
530
531	/* Resize deflate buffer on resolution change */
532	if (ctx->width != avctx->width || ctx->height != avctx->height) {
533	ctx->deflatelen = avctx->width * avctx->height * (3 + 1);
534	ret = av_reallocp(&ctx->deflatebuffer, ctx->deflatelen);
535	if (ret < 0)
536	return ret;
537	}
538	dlen = ctx->deflatelen;
539
540	/* Frames are deflated, need to inflate them first */
541	ret = uncompress(ctx->deflatebuffer, &dlen, avpkt->data, avpkt->size);
542	if (ret) {
543	av_log(avctx, AV_LOG_ERROR, "Deflate error %d.\n", ret);
544	return AVERROR_UNKNOWN;
545	}
546
547	bytestream2_init(&ctx->gbc, ctx->deflatebuffer, dlen);
548
549	/* Check for tag and for size info */
550	if (bytestream2_get_bytes_left(&ctx->gbc) < 4 + 4) {
551	av_log(avctx, AV_LOG_ERROR, "Frame is too small.\n");
552	return AVERROR_INVALIDDATA;
553	}
554
555	/* Read tag */
556	tag_header = bytestream2_get_le32(&ctx->gbc);
557
558	if (tag_header == MKTAG('T','D','S','F')) {
559	int number_tiles;
560	if (bytestream2_get_bytes_left(&ctx->gbc) < TDSF_HEADER_SIZE) {
561	av_log(avctx, AV_LOG_ERROR, "TDSF tag is too small.\n");
562	return AVERROR_INVALIDDATA;
563	}
564	/* First 4 bytes here are the number of GEPJ/WAR tiles in this frame */
565	number_tiles = bytestream2_get_le32(&ctx->gbc);
566
567	bytestream2_skip(&ctx->gbc, 4); // internal timestamp maybe?
568	keyframe = bytestream2_get_le32(&ctx->gbc) == 0x30;
569
570	ret = tdsc_parse_tdsf(avctx, number_tiles);
571	if (ret < 0)
572	return ret;
573
574	/* Check if there is anything else we are able to parse */
575	if (bytestream2_get_bytes_left(&ctx->gbc) >= 4 + 4)
576	tag_header = bytestream2_get_le32(&ctx->gbc);
577	}
578
579	/* This tag can be after a TDSF block or on its own frame */
580	if (tag_header == MKTAG('D','T','S','M')) {
581	/* First 4 bytes here are the total size in bytes for this frame */
582	int tag_size = bytestream2_get_le32(&ctx->gbc);
583
584	if (bytestream2_get_bytes_left(&ctx->gbc) < tag_size) {
585	av_log(avctx, AV_LOG_ERROR, "DTSM tag is too small.\n");
586	return AVERROR_INVALIDDATA;
587	}
588
589	ret = tdsc_parse_dtsm(avctx);
590	if (ret < 0)
591	return ret;
592	}
593
594	/* Get the output frame and copy the reference frame */
595	ret = ff_get_buffer(avctx, frame, 0);
596	if (ret < 0)
597	return ret;
598
599	ret = av_frame_copy(frame, ctx->refframe);
600	if (ret < 0)
601	return ret;
602
603	/* Paint the cursor on the output frame */
604	tdsc_paint_cursor(avctx, frame->data[0], frame->linesize[0]);
605
606	/* Frame is ready to be output */
607	if (keyframe) {
608	frame->pict_type = AV_PICTURE_TYPE_I;
609	frame->key_frame = 1;
610	} else {
611	frame->pict_type = AV_PICTURE_TYPE_P;
612	}
613	*got_frame = 1;
614
615	return avpkt->size;
616	}
617
618	AVCodec ff_tdsc_decoder = {
619	.name = "tdsc",
620	.long_name = NULL_IF_CONFIG_SMALL("TDSC"),
621	.type = AVMEDIA_TYPE_VIDEO,
622	.id = AV_CODEC_ID_TDSC,
623	.init = tdsc_init,
624	.decode = tdsc_decode_frame,
625	.close = tdsc_close,
626	.priv_data_size = sizeof(TDSCContext),
627	.capabilities = AV_CODEC_CAP_DR1,
628	.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
629	FF_CODEC_CAP_INIT_CLEANUP,
630	};
631