FFmpeg  4.4.4
tscc2.c
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1 /*
2  * TechSmith Screen Codec 2 (aka Dora) decoder
3  * Copyright (c) 2012 Konstantin Shishkov
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  * TechSmith Screen Codec 2 decoder
25  */
26 
27 #include <inttypes.h>
28 
29 #include "libavutil/thread.h"
30 
31 #define BITSTREAM_READER_LE
32 #include "avcodec.h"
33 #include "bytestream.h"
34 #include "get_bits.h"
35 #include "internal.h"
36 #include "mathops.h"
37 #include "tscc2data.h"
38 
39 #define TSCC2_VLC_BITS 9
40 
41 typedef struct TSCC2Context {
46  int quant[2];
47  int q[2][3];
49 
50  int block[16];
51 } TSCC2Context;
52 
54 
55 static av_cold void tscc2_init_vlc(VLC *vlc, int *offset, int nb_codes,
56  const uint8_t *lens, const void *syms,
57  int sym_length)
58 {
59  static VLC_TYPE vlc_buf[15442][2];
60 
61  vlc->table = &vlc_buf[*offset];
64  lens, 1, syms, sym_length, sym_length, 0,
66  *offset += vlc->table_size;
67 }
68 
69 static av_cold void tscc2_init_vlcs(void)
70 {
71  const uint16_t *ac_vlc_syms = tscc2_ac_vlc_syms;
72  const uint8_t *ac_vlc_lens = tscc2_ac_vlc_lens;
73  int i, offset = 0;
74 
77 
78  for (i = 0; i < NUM_VLC_SETS; i++) {
79  tscc2_init_vlc(&nc_vlc[i], &offset, 16,
81 
83  ac_vlc_lens, ac_vlc_syms, 2);
84  ac_vlc_lens += tscc2_ac_vlc_sizes[i];
85  ac_vlc_syms += tscc2_ac_vlc_sizes[i];
86  }
87 }
88 
89 #define DEQUANT(val, q) (((q) * (val) + 0x80) >> 8)
90 #define DCT1D(d0, d1, d2, d3, s0, s1, s2, s3, OP) \
91  OP(d0, 5 * ((s0) + (s1) + (s2)) + 2 * (s3)); \
92  OP(d1, 5 * ((s0) - (s2) - (s3)) + 2 * (s1)); \
93  OP(d2, 5 * ((s0) - (s2) + (s3)) - 2 * (s1)); \
94  OP(d3, 5 * ((s0) - (s1) + (s2)) - 2 * (s3)); \
95 
96 #define COL_OP(a, b) a = (b)
97 #define ROW_OP(a, b) a = ((b) + 0x20) >> 6
98 
99 static void tscc2_idct4_put(int *in, int q[3], uint8_t *dst, int stride)
100 {
101  int i;
102  int tblk[4 * 4];
103  int t0, t1, t2, t3;
104 
105  for (i = 0; i < 4; i++) {
106  t0 = DEQUANT(q[0 + (i & 1)], in[0 * 4 + i]);
107  t1 = DEQUANT(q[1 + (i & 1)], in[1 * 4 + i]);
108  t2 = DEQUANT(q[0 + (i & 1)], in[2 * 4 + i]);
109  t3 = DEQUANT(q[1 + (i & 1)], in[3 * 4 + i]);
110  DCT1D(tblk[0 * 4 + i], tblk[1 * 4 + i],
111  tblk[2 * 4 + i], tblk[3 * 4 + i],
112  t0, t1, t2, t3, COL_OP);
113  }
114  for (i = 0; i < 4; i++) {
115  DCT1D(dst[0], dst[1], dst[2], dst[3],
116  tblk[i * 4 + 0], tblk[i * 4 + 1],
117  tblk[i * 4 + 2], tblk[i * 4 + 3], ROW_OP);
118  dst += stride;
119  }
120 }
121 
122 static int tscc2_decode_mb(TSCC2Context *c, int *q, int vlc_set,
123  uint8_t *dst, int stride, int plane)
124 {
125  GetBitContext *gb = &c->gb;
126  int prev_dc, dc, nc, ac, bpos, val;
127  int i, j, k, l;
128 
129  if (get_bits1(gb)) {
130  if (get_bits1(gb)) {
131  val = get_bits(gb, 8);
132  for (i = 0; i < 8; i++, dst += stride)
133  memset(dst, val, 16);
134  } else {
135  if (get_bits_left(gb) < 16 * 8 * 8)
136  return AVERROR_INVALIDDATA;
137  for (i = 0; i < 8; i++) {
138  for (j = 0; j < 16; j++)
139  dst[j] = get_bits(gb, 8);
140  dst += stride;
141  }
142  }
143  return 0;
144  }
145 
146  prev_dc = 0;
147  for (j = 0; j < 2; j++) {
148  for (k = 0; k < 4; k++) {
149  if (!(j | k)) {
150  dc = get_bits(gb, 8);
151  } else {
153  if (dc == 0x100)
154  dc = get_bits(gb, 8);
155  }
156  dc = (dc + prev_dc) & 0xFF;
157  prev_dc = dc;
158  c->block[0] = dc;
159 
160  nc = get_vlc2(gb, nc_vlc[vlc_set].table, TSCC2_VLC_BITS, 1);
161 
162  bpos = 1;
163  memset(c->block + 1, 0, 15 * sizeof(*c->block));
164  for (l = 0; l < nc; l++) {
165  ac = get_vlc2(gb, ac_vlc[vlc_set].table, TSCC2_VLC_BITS, 2);
166  if (ac == 0x1000)
167  ac = get_bits(gb, 12);
168  bpos += ac & 0xF;
169  if (bpos >= 16)
170  return AVERROR_INVALIDDATA;
171  val = sign_extend(ac >> 4, 8);
172  c->block[ff_zigzag_scan[bpos++]] = val;
173  }
174  tscc2_idct4_put(c->block, q, dst + k * 4, stride);
175  }
176  dst += 4 * stride;
177  }
178  return 0;
179 }
180 
181 static int tscc2_decode_slice(TSCC2Context *c, int mb_y,
182  const uint8_t *buf, int buf_size)
183 {
184  int i, mb_x, q, ret;
185  int off;
186 
187  if ((ret = init_get_bits8(&c->gb, buf, buf_size)) < 0)
188  return ret;
189 
190  for (mb_x = 0; mb_x < c->mb_width; mb_x++) {
191  q = c->slice_quants[mb_x + c->mb_width * mb_y];
192 
193  if (q == 0 || q == 3) // skip block
194  continue;
195  for (i = 0; i < 3; i++) {
196  off = mb_x * 16 + mb_y * 8 * c->pic->linesize[i];
197  ret = tscc2_decode_mb(c, c->q[q - 1], c->quant[q - 1] - 2,
198  c->pic->data[i] + off, c->pic->linesize[i], i);
199  if (ret)
200  return ret;
201  }
202  }
203 
204  return 0;
205 }
206 
207 static int tscc2_decode_frame(AVCodecContext *avctx, void *data,
208  int *got_frame, AVPacket *avpkt)
209 {
210  const uint8_t *buf = avpkt->data;
211  int buf_size = avpkt->size;
212  TSCC2Context *c = avctx->priv_data;
213  GetByteContext gb;
214  uint32_t frame_type, size;
215  int i, val, len, pos = 0;
216  int num_mb = c->mb_width * c->mb_height;
217  int ret;
218 
219  bytestream2_init(&gb, buf, buf_size);
220  frame_type = bytestream2_get_byte(&gb);
221  if (frame_type > 1) {
222  av_log(avctx, AV_LOG_ERROR, "Incorrect frame type %"PRIu32"\n",
223  frame_type);
224  return AVERROR_INVALIDDATA;
225  }
226 
227  if (frame_type == 0) {
228  // Skip duplicate frames
229  return buf_size;
230  }
231 
232  if ((ret = ff_reget_buffer(avctx, c->pic, 0)) < 0) {
233  return ret;
234  }
235 
236  if (bytestream2_get_bytes_left(&gb) < 4) {
237  av_log(avctx, AV_LOG_ERROR, "Frame is too short\n");
238  return AVERROR_INVALIDDATA;
239  }
240 
241  c->quant[0] = bytestream2_get_byte(&gb);
242  c->quant[1] = bytestream2_get_byte(&gb);
243  if (c->quant[0] < 2 || c->quant[0] > NUM_VLC_SETS + 1 ||
244  c->quant[1] < 2 || c->quant[1] > NUM_VLC_SETS + 1) {
245  av_log(avctx, AV_LOG_ERROR, "Invalid quantisers %d / %d\n",
246  c->quant[0], c->quant[1]);
247  return AVERROR_INVALIDDATA;
248  }
249 
250  for (i = 0; i < 3; i++) {
251  c->q[0][i] = tscc2_quants[c->quant[0] - 2][i];
252  c->q[1][i] = tscc2_quants[c->quant[1] - 2][i];
253  }
254 
255  bytestream2_skip(&gb, 1);
256 
257  size = bytestream2_get_le32(&gb);
258  if (size > bytestream2_get_bytes_left(&gb)) {
259  av_log(avctx, AV_LOG_ERROR, "Slice properties chunk is too large\n");
260  return AVERROR_INVALIDDATA;
261  }
262 
263  for (i = 0; i < size; i++) {
264  val = bytestream2_get_byte(&gb);
265  len = val & 0x3F;
266  val >>= 6;
267  if (pos + len > num_mb) {
268  av_log(avctx, AV_LOG_ERROR, "Too many slice properties\n");
269  return AVERROR_INVALIDDATA;
270  }
271  memset(c->slice_quants + pos, val, len);
272  pos += len;
273  }
274  if (pos < num_mb) {
275  av_log(avctx, AV_LOG_ERROR, "Too few slice properties (%d / %d)\n",
276  pos, num_mb);
277  return AVERROR_INVALIDDATA;
278  }
279 
280  for (i = 0; i < c->mb_height; i++) {
281  size = bytestream2_peek_byte(&gb);
282  if (size & 1) {
283  size = bytestream2_get_byte(&gb) - 1;
284  } else {
285  size = bytestream2_get_le32(&gb) >> 1;
286  }
287  if (!size) {
288  int skip_row = 1, j, off = i * c->mb_width;
289  for (j = 0; j < c->mb_width; j++) {
290  if (c->slice_quants[off + j] == 1 ||
291  c->slice_quants[off + j] == 2) {
292  skip_row = 0;
293  break;
294  }
295  }
296  if (!skip_row) {
297  av_log(avctx, AV_LOG_ERROR, "Non-skip row with zero size\n");
298  return AVERROR_INVALIDDATA;
299  }
300  }
301  if (bytestream2_get_bytes_left(&gb) < size) {
302  av_log(avctx, AV_LOG_ERROR, "Invalid slice size (%"PRIu32"/%u)\n",
304  return AVERROR_INVALIDDATA;
305  }
306  ret = tscc2_decode_slice(c, i, buf + bytestream2_tell(&gb), size);
307  if (ret) {
308  av_log(avctx, AV_LOG_ERROR, "Error decoding slice %d\n", i);
309  return ret;
310  }
311  bytestream2_skip(&gb, size);
312  }
313 
314  *got_frame = 1;
315  if ((ret = av_frame_ref(data, c->pic)) < 0)
316  return ret;
317 
318  /* always report that the buffer was completely consumed */
319  return buf_size;
320 }
321 
323 {
324  TSCC2Context * const c = avctx->priv_data;
325 
326  av_frame_free(&c->pic);
327  av_freep(&c->slice_quants);
328 
329  return 0;
330 }
331 
333 {
334  TSCC2Context * const c = avctx->priv_data;
335  static AVOnce init_static_once = AV_ONCE_INIT;
336 
337  c->avctx = avctx;
338 
339  avctx->pix_fmt = AV_PIX_FMT_YUV444P;
340 
341  c->mb_width = FFALIGN(avctx->width, 16) >> 4;
342  c->mb_height = FFALIGN(avctx->height, 8) >> 3;
343  c->slice_quants = av_malloc(c->mb_width * c->mb_height);
344  if (!c->slice_quants) {
345  av_log(avctx, AV_LOG_ERROR, "Cannot allocate slice information\n");
346  return AVERROR(ENOMEM);
347  }
348 
349  c->pic = av_frame_alloc();
350  if (!c->pic)
351  return AVERROR(ENOMEM);
352 
353  ff_thread_once(&init_static_once, tscc2_init_vlcs);
354 
355  return 0;
356 }
357 
359  .name = "tscc2",
360  .long_name = NULL_IF_CONFIG_SMALL("TechSmith Screen Codec 2"),
361  .type = AVMEDIA_TYPE_VIDEO,
362  .id = AV_CODEC_ID_TSCC2,
363  .priv_data_size = sizeof(TSCC2Context),
365  .close = tscc2_decode_end,
367  .capabilities = AV_CODEC_CAP_DR1,
369 };
static double val(void *priv, double ch)
Definition: aeval.c:76
#define av_cold
Definition: attributes.h:88
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> dc
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
uint8_t
Libavcodec external API header.
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
int ff_init_vlc_from_lengths(VLC *vlc_arg, int nb_bits, int nb_codes, const int8_t *lens, int lens_wrap, const void *symbols, int symbols_wrap, int symbols_size, int offset, int flags, void *logctx)
Build VLC decoding tables suitable for use with get_vlc2()
Definition: bitstream.c:381
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:158
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:168
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:192
static VLC_TYPE vlc_buf[16716][2]
Definition: clearvideo.c:86
#define NULL
Definition: coverity.c:32
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Identical in function to ff_get_buffer(), except it reuses the existing buffer if available.
Definition: decode.c:2007
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
bitstream reader API header.
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:797
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:677
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
@ AV_CODEC_ID_TSCC2
Definition: codec_id.h:213
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:443
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
int i
Definition: input.c:407
frame_type
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:41
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:49
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
#define AVOnce
Definition: thread.h:172
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:175
#define AV_ONCE_INIT
Definition: thread.h:173
int stride
Definition: mace.c:144
#define FFALIGN(x, a)
Definition: macros.h:48
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130
const uint8_t ff_zigzag_scan[16+1]
Definition: mathtables.c:109
const char data[16]
Definition: mxf.c:142
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
static const uint16_t table[]
Definition: prosumer.c:206
#define t0
Definition: regdef.h:28
#define t1
Definition: regdef.h:29
#define t3
Definition: regdef.h:31
#define t2
Definition: regdef.h:30
#define FF_ARRAY_ELEMS(a)
unsigned int pos
Definition: spdifenc.c:412
main external API structure.
Definition: avcodec.h:536
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:746
int width
picture width / height.
Definition: avcodec.h:709
void * priv_data
Definition: avcodec.h:563
AVCodec.
Definition: codec.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:204
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
This structure stores compressed data.
Definition: packet.h:346
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
GetBitContext gb
Definition: tscc2.c:48
uint8_t * slice_quants
Definition: tscc2.c:45
int mb_height
Definition: tscc2.c:44
int mb_width
Definition: tscc2.c:44
int quant[2]
Definition: tscc2.c:46
AVCodecContext * avctx
Definition: tscc2.c:42
int q[2][3]
Definition: tscc2.c:47
int block[16]
Definition: tscc2.c:50
AVFrame * pic
Definition: tscc2.c:43
Definition: vlc.h:26
int table_size
Definition: vlc.h:29
int table_allocated
Definition: vlc.h:29
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
#define av_freep(p)
#define av_malloc(s)
#define av_log(a,...)
#define COL_OP(a, b)
Definition: tscc2.c:96
static VLC ac_vlc[NUM_VLC_SETS]
Definition: tscc2.c:53
static av_cold int tscc2_decode_end(AVCodecContext *avctx)
Definition: tscc2.c:322
static void tscc2_idct4_put(int *in, int q[3], uint8_t *dst, int stride)
Definition: tscc2.c:99
AVCodec ff_tscc2_decoder
Definition: tscc2.c:358
static VLC nc_vlc[NUM_VLC_SETS]
Definition: tscc2.c:53
static av_cold int tscc2_decode_init(AVCodecContext *avctx)
Definition: tscc2.c:332
static int tscc2_decode_slice(TSCC2Context *c, int mb_y, const uint8_t *buf, int buf_size)
Definition: tscc2.c:181
static int tscc2_decode_mb(TSCC2Context *c, int *q, int vlc_set, uint8_t *dst, int stride, int plane)
Definition: tscc2.c:122
static int tscc2_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: tscc2.c:207
#define TSCC2_VLC_BITS
Definition: tscc2.c:39
#define DEQUANT(val, q)
Definition: tscc2.c:89
static av_cold void tscc2_init_vlcs(void)
Definition: tscc2.c:69
static av_cold void tscc2_init_vlc(VLC *vlc, int *offset, int nb_codes, const uint8_t *lens, const void *syms, int sym_length)
Definition: tscc2.c:55
#define DCT1D(d0, d1, d2, d3, s0, s1, s2, s3, OP)
Definition: tscc2.c:90
#define ROW_OP(a, b)
Definition: tscc2.c:97
static VLC dc_vlc
Definition: tscc2.c:53
static const uint8_t tscc2_nc_vlc_syms[NUM_VLC_SETS][16]
Definition: tscc2data.h:53
static const uint16_t tscc2_ac_vlc_syms[]
Definition: tscc2data.h:98
#define NUM_VLC_SETS
Definition: tscc2data.h:27
static const uint8_t tscc2_ac_vlc_lens[]
Definition: tscc2data.h:312
static const int tscc2_ac_vlc_sizes[NUM_VLC_SETS]
Definition: tscc2data.h:431
static const uint16_t tscc2_quants[NUM_VLC_SETS][3]
Definition: tscc2data.h:29
static const uint8_t tscc2_nc_vlc_lens[NUM_VLC_SETS][16]
Definition: tscc2data.h:82
static const uint8_t tscc2_dc_vlc_lens[DC_VLC_COUNT]
Definition: tscc2data.h:47
static const uint16_t tscc2_dc_vlc_syms[DC_VLC_COUNT]
Definition: tscc2data.h:39
#define DC_VLC_COUNT
Definition: tscc2data.h:37
int size
static const uint8_t offset[127][2]
Definition: vf_spp.c:107
#define INIT_VLC_STATIC_OVERLONG
Definition: vlc.h:96
#define VLC_TYPE
Definition: vlc.h:24
#define INIT_VLC_OUTPUT_LE
Definition: vlc.h:93
int len
static double c[64]