}
}
-static int build_vlc(VLC *vlc, const uint8_t *len, int count)
+static av_cold int build_vlc(VLC *vlc, const SheerTable *table)
{
- uint16_t codes[1024];
- unsigned index;
- int i;
-
- index = 0;
- for (i = 0; i < count; i++) {
- codes[i] = index >> (32 - len[i]);
- index += 1U << (32 - len[i]);
+ const uint8_t *cur = table->lens;
+ uint8_t lens[1024];
+ unsigned count = 0;
+
+ for (int step = 1, len = 1; len > 0; len += step) {
+ unsigned new_count = count;
+
+ if (len == 16) {
+ new_count += table->nb_16s;
+ step = -1;
+ } else
+ new_count += *cur++;
+
+ for (; count < new_count; count++)
+ lens[count] = len;
}
ff_free_vlc(vlc);
- return init_vlc(vlc, SHEER_VLC_BITS, count,
- len, sizeof(*len), sizeof(*len),
- codes, sizeof(*codes), sizeof(*codes), 0);
+ return ff_init_vlc_from_lengths(vlc, SHEER_VLC_BITS, count,
+ lens, sizeof(*lens), NULL, 0, 0, 0, 0, NULL);
}
static int decode_frame(AVCodecContext *avctx,
{
SheerVideoContext *s = avctx->priv_data;
ThreadFrame frame = { .f = data };
+ const SheerTable *table;
AVFrame *p = data;
GetBitContext gb;
unsigned format;
case MKTAG(' ', 'R', 'G', 'B'):
avctx->pix_fmt = AV_PIX_FMT_RGB0;
s->decode_frame = decode_rgb;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_r_rgb, 256);
- ret |= build_vlc(&s->vlc[1], l_g_rgb, 256);
- }
+ table = rgb;
break;
case MKTAG(' ', 'r', 'G', 'B'):
avctx->pix_fmt = AV_PIX_FMT_RGB0;
s->decode_frame = decode_rgbi;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_r_rgbi, 256);
- ret |= build_vlc(&s->vlc[1], l_g_rgbi, 256);
- }
+ table = rgbi;
break;
case MKTAG('A', 'R', 'G', 'X'):
avctx->pix_fmt = AV_PIX_FMT_GBRAP10;
s->decode_frame = decode_argx;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_r_rgbx, 1024);
- ret |= build_vlc(&s->vlc[1], l_g_rgbx, 1024);
- }
+ table = rgbx;
break;
case MKTAG('A', 'r', 'G', 'X'):
avctx->pix_fmt = AV_PIX_FMT_GBRAP10;
s->decode_frame = decode_argxi;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_r_rgbxi, 1024);
- ret |= build_vlc(&s->vlc[1], l_g_rgbxi, 1024);
- }
+ table = rgbxi;
break;
case MKTAG('R', 'G', 'B', 'X'):
avctx->pix_fmt = AV_PIX_FMT_GBRP10;
s->decode_frame = decode_rgbx;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_r_rgbx, 1024);
- ret |= build_vlc(&s->vlc[1], l_g_rgbx, 1024);
- }
+ table = rgbx;
break;
case MKTAG('r', 'G', 'B', 'X'):
avctx->pix_fmt = AV_PIX_FMT_GBRP10;
s->decode_frame = decode_rgbxi;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_r_rgbxi, 1024);
- ret |= build_vlc(&s->vlc[1], l_g_rgbxi, 1024);
- }
+ table = rgbxi;
break;
case MKTAG('A', 'R', 'G', 'B'):
avctx->pix_fmt = AV_PIX_FMT_ARGB;
s->decode_frame = decode_argb;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_r_rgb, 256);
- ret |= build_vlc(&s->vlc[1], l_g_rgb, 256);
- }
+ table = rgb;
break;
case MKTAG('A', 'r', 'G', 'B'):
avctx->pix_fmt = AV_PIX_FMT_ARGB;
s->decode_frame = decode_argbi;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_r_rgbi, 256);
- ret |= build_vlc(&s->vlc[1], l_g_rgbi, 256);
- }
+ table = rgbi;
break;
case MKTAG('A', 'Y', 'B', 'R'):
s->alt = 1;
case MKTAG('A', 'Y', 'b', 'R'):
avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
s->decode_frame = decode_aybr;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_ybr, 256);
- ret |= build_vlc(&s->vlc[1], l_u_ybr, 256);
- }
+ table = ybr;
break;
case MKTAG('A', 'y', 'B', 'R'):
s->alt = 1;
case MKTAG('A', 'y', 'b', 'R'):
avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
s->decode_frame = decode_aybri;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_ybri, 256);
- ret |= build_vlc(&s->vlc[1], l_u_ybri, 256);
- }
+ table = ybri;
break;
case MKTAG(' ', 'Y', 'B', 'R'):
s->alt = 1;
case MKTAG(' ', 'Y', 'b', 'R'):
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
s->decode_frame = decode_ybr;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_ybr, 256);
- ret |= build_vlc(&s->vlc[1], l_u_ybr, 256);
- }
+ table = ybr;
break;
case MKTAG(' ', 'y', 'B', 'R'):
s->alt = 1;
case MKTAG(' ', 'y', 'b', 'R'):
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
s->decode_frame = decode_ybri;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_ybri, 256);
- ret |= build_vlc(&s->vlc[1], l_u_ybri, 256);
- }
+ table = ybri;
break;
case MKTAG('Y', 'B', 'R', 0x0a):
avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
s->decode_frame = decode_ybr10;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_ybr10, 1024);
- ret |= build_vlc(&s->vlc[1], l_u_ybr10, 1024);
- }
+ table = ybr10;
break;
case MKTAG('y', 'B', 'R', 0x0a):
avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
s->decode_frame = decode_ybr10i;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_ybr10i, 1024);
- ret |= build_vlc(&s->vlc[1], l_u_ybr10i, 1024);
- }
+ table = ybr10i;
break;
case MKTAG('C', 'A', '4', 'p'):
avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
s->decode_frame = decode_ca4p;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_ybr10, 1024);
- ret |= build_vlc(&s->vlc[1], l_u_ybr10, 1024);
- }
+ table = ybr10;
break;
case MKTAG('C', 'A', '4', 'i'):
avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
s->decode_frame = decode_ca4i;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_ybr10i, 1024);
- ret |= build_vlc(&s->vlc[1], l_u_ybr10i, 1024);
- }
+ table = ybr10i;
break;
case MKTAG('B', 'Y', 'R', 'Y'):
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
s->decode_frame = decode_byry;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_byry, 256);
- ret |= build_vlc(&s->vlc[1], l_u_byry, 256);
- }
+ table = byry;
break;
case MKTAG('B', 'Y', 'R', 'y'):
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
s->decode_frame = decode_byryi;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_byryi, 256);
- ret |= build_vlc(&s->vlc[1], l_u_byryi, 256);
- }
+ table = byryi;
break;
case MKTAG('Y', 'b', 'Y', 'r'):
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
s->decode_frame = decode_ybyr;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_ybyr, 256);
- ret |= build_vlc(&s->vlc[1], l_u_ybyr, 256);
- }
+ table = ybyr;
break;
case MKTAG('C', '8', '2', 'p'):
avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
s->decode_frame = decode_c82p;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_byry, 256);
- ret |= build_vlc(&s->vlc[1], l_u_byry, 256);
- }
+ table = byry;
break;
case MKTAG('C', '8', '2', 'i'):
avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
s->decode_frame = decode_c82i;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_byryi, 256);
- ret |= build_vlc(&s->vlc[1], l_u_byryi, 256);
- }
+ table = byryi;
break;
case MKTAG(0xa2, 'Y', 'R', 'Y'):
avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
s->decode_frame = decode_yry10;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_yry10, 1024);
- ret |= build_vlc(&s->vlc[1], l_u_yry10, 1024);
- }
+ table = yry10;
break;
case MKTAG(0xa2, 'Y', 'R', 'y'):
avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
s->decode_frame = decode_yry10i;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_yry10i, 1024);
- ret |= build_vlc(&s->vlc[1], l_u_yry10i, 1024);
- }
+ table = yry10i;
break;
case MKTAG('C', 'A', '2', 'p'):
avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
s->decode_frame = decode_ca2p;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_yry10, 1024);
- ret |= build_vlc(&s->vlc[1], l_u_yry10, 1024);
- }
+ table = yry10;
break;
case MKTAG('C', 'A', '2', 'i'):
avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
s->decode_frame = decode_ca2i;
- if (s->format != format) {
- ret = build_vlc(&s->vlc[0], l_y_yry10i, 1024);
- ret |= build_vlc(&s->vlc[1], l_u_yry10i, 1024);
- }
+ table = yry10i;
break;
default:
avpriv_request_sample(avctx, "unsupported format: 0x%X", format);
}
if (s->format != format) {
- if (ret < 0) {
+ if ((ret = build_vlc(&s->vlc[0], &table[0])) < 0 ||
+ (ret = build_vlc(&s->vlc[1], &table[1])) < 0) {
s->format = 0;
return ret;
}
return 0;
}
-AVCodec ff_sheervideo_decoder = {
+const AVCodec ff_sheervideo_decoder = {
.name = "sheervideo",
.long_name = NULL_IF_CONFIG_SMALL("BitJazz SheerVideo"),
.type = AVMEDIA_TYPE_VIDEO,
projects / ffmpeg / blobdiff