X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fmss4.c;h=7f11f30dc801e800b18981374643b0879362a08e;hb=252500a78fe1a31abc79e6070d16f50382c39343;hp=b58c21be9382379c6d28d56aa7e08ff0f4e90453;hpb=3eea8edf618079e44719fe059ddd953b21ef1ba9;p=ffmpeg diff --git a/libavcodec/mss4.c b/libavcodec/mss4.c index b58c21be938..7f11f30dc80 100644 --- a/libavcodec/mss4.c +++ b/libavcodec/mss4.c @@ -25,10 +25,13 @@ * aka Microsoft Expression Encoder Screen) decoder */ +#include "libavutil/thread.h" + #include "avcodec.h" #include "bytestream.h" #include "get_bits.h" #include "internal.h" +#include "jpegtables.h" #include "mss34dsp.h" #include "unary.h" @@ -57,56 +60,6 @@ static const uint8_t mss4_dc_vlc_lens[2][16] = { { 0, 3, 1, 1, 1, 1, 1, 1, 1, 2, 0, 0, 0, 0, 0, 0 } }; -static const uint8_t mss4_ac_vlc_lens[2][16] = { - { 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 125 }, - { 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 119 } -}; - -static const uint8_t mss4_ac_vlc_syms[2][162] = { - { 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, - 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, - 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1, 0x08, - 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, - 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, - 0x17, 0x18, 0x19, 0x1A, 0x25, 0x26, 0x27, 0x28, - 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, - 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, - 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, - 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, - 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, - 0x7A, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, - 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, - 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, - 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, - 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, - 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, - 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2, - 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, - 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, - 0xF9, 0xFA }, - { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, - 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, - 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, - 0xA1, 0xB1, 0xC1, 0x09, 0x23, 0x33, 0x52, 0xF0, - 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16, 0x24, 0x34, - 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, - 0x27, 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, - 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, - 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, - 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, - 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, - 0x79, 0x7A, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, - 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, - 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, - 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, - 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, - 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, - 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, - 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, - 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, - 0xF9, 0xFA } -}; - static const uint8_t vec_len_syms[2][4] = { { 4, 2, 3, 1 }, { 4, 1, 2, 3 } @@ -127,8 +80,6 @@ static const uint8_t mss4_vec_entry_vlc_syms[2][9] = { typedef struct MSS4Context { AVFrame *pic; - VLC dc_vlc[2], ac_vlc[2]; - VLC vec_entry_vlc[2]; int block[64]; uint8_t imgbuf[3][16 * 16]; @@ -142,56 +93,43 @@ typedef struct MSS4Context { int prev_vec[3][4]; } MSS4Context; -static av_cold int mss4_init_vlc(VLC *vlc, const uint8_t *lens, - const uint8_t *syms, int num_syms) +static VLC dc_vlc[2], ac_vlc[2]; +static VLC vec_entry_vlc[2]; + +static av_cold void mss4_init_vlc(VLC *vlc, unsigned *offset, + const uint8_t *lens, const uint8_t *syms) { + static VLC_TYPE vlc_buf[2146][2]; uint8_t bits[MAX_ENTRIES]; - uint16_t codes[MAX_ENTRIES]; int i, j; - int prefix = 0, max_bits = 0, idx = 0; + int idx = 0; for (i = 0; i < 16; i++) { for (j = 0; j < lens[i]; j++) { bits[idx] = i + 1; - codes[idx] = prefix++; - max_bits = i + 1; idx++; } - prefix <<= 1; } - return ff_init_vlc_sparse(vlc, FFMIN(max_bits, 9), num_syms, bits, 1, 1, - codes, 2, 2, syms, 1, 1, 0); + vlc->table = &vlc_buf[*offset]; + vlc->table_allocated = FF_ARRAY_ELEMS(vlc_buf) - *offset; + ff_init_vlc_from_lengths(vlc, FFMIN(bits[idx - 1], 9), idx, + bits, 1, syms, 1, 1, + 0, INIT_VLC_STATIC_OVERLONG, NULL); + *offset += vlc->table_size; } -static av_cold int mss4_init_vlcs(MSS4Context *ctx) +static av_cold void mss4_init_vlcs(void) { - int ret, i; - - for (i = 0; i < 2; i++) { - ret = mss4_init_vlc(&ctx->dc_vlc[i], mss4_dc_vlc_lens[i], NULL, 12); - if (ret) - return ret; - ret = mss4_init_vlc(&ctx->ac_vlc[i], mss4_ac_vlc_lens[i], - mss4_ac_vlc_syms[i], 162); - if (ret) - return ret; - ret = mss4_init_vlc(&ctx->vec_entry_vlc[i], mss4_vec_entry_vlc_lens[i], - mss4_vec_entry_vlc_syms[i], 9); - if (ret) - return ret; - } - return 0; -} - -static av_cold void mss4_free_vlcs(MSS4Context *ctx) -{ - int i; - - for (i = 0; i < 2; i++) { - ff_free_vlc(&ctx->dc_vlc[i]); - ff_free_vlc(&ctx->ac_vlc[i]); - ff_free_vlc(&ctx->vec_entry_vlc[i]); + for (unsigned i = 0, offset = 0; i < 2; i++) { + mss4_init_vlc(&dc_vlc[i], &offset, mss4_dc_vlc_lens[i], NULL); + mss4_init_vlc(&ac_vlc[i], &offset, + i ? avpriv_mjpeg_bits_ac_chrominance + 1 + : avpriv_mjpeg_bits_ac_luminance + 1, + i ? avpriv_mjpeg_val_ac_chrominance + : avpriv_mjpeg_val_ac_luminance); + mss4_init_vlc(&vec_entry_vlc[i], &offset, mss4_vec_entry_vlc_lens[i], + mss4_vec_entry_vlc_syms[i]); } } @@ -289,7 +227,7 @@ static int mss4_decode_dct_block(MSS4Context *c, GetBitContext *gb, int xpos = mb_x * 2 + i; c->dc_cache[j][TOP_LEFT] = c->dc_cache[j][TOP]; c->dc_cache[j][TOP] = c->prev_dc[0][mb_x * 2 + i]; - ret = mss4_decode_dct(gb, c->dc_vlc, c->ac_vlc, c->block, + ret = mss4_decode_dct(gb, &dc_vlc[0], &ac_vlc[0], c->block, c->dc_cache[j], xpos, mb_y * 2 + j, c->quant_mat[0]); if (ret) @@ -305,7 +243,7 @@ static int mss4_decode_dct_block(MSS4Context *c, GetBitContext *gb, for (i = 1; i < 3; i++) { c->dc_cache[i + 1][TOP_LEFT] = c->dc_cache[i + 1][TOP]; c->dc_cache[i + 1][TOP] = c->prev_dc[i][mb_x]; - ret = mss4_decode_dct(gb, c->dc_vlc + 1, c->ac_vlc + 1, + ret = mss4_decode_dct(gb, &dc_vlc[1], &ac_vlc[1], c->block, c->dc_cache[i + 1], mb_x, mb_y, c->quant_mat[1]); if (ret) @@ -397,7 +335,7 @@ static int mss4_decode_image_block(MSS4Context *ctx, GetBitContext *gb, for (i = 0; i < 3; i++) { vec_len[i] = vec_len_syms[!!i][get_unary(gb, 0, 3)]; for (j = 0; j < vec_len[i]; j++) { - vec[i][j] = get_coeff(gb, &ctx->vec_entry_vlc[!!i]); + vec[i][j] = get_coeff(gb, &vec_entry_vlc[!!i]); vec[i][j] += ctx->prev_vec[i][j]; ctx->prev_vec[i][j] = vec[i][j]; } @@ -552,8 +490,13 @@ static int mss4_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, "Empty frame found but it is not a skip frame.\n"); return AVERROR_INVALIDDATA; } + mb_width = FFALIGN(width, 16) >> 4; + mb_height = FFALIGN(height, 16) >> 4; + + if (frame_type != SKIP_FRAME && 8*buf_size < 8*HEADER_SIZE + mb_width*mb_height) + return AVERROR_INVALIDDATA; - if ((ret = ff_reget_buffer(avctx, c->pic)) < 0) + if ((ret = ff_reget_buffer(avctx, c->pic, 0)) < 0) return ret; c->pic->key_frame = (frame_type == INTRA_FRAME); c->pic->pict_type = (frame_type == INTRA_FRAME) ? AV_PICTURE_TYPE_I @@ -574,9 +517,6 @@ static int mss4_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, if ((ret = init_get_bits8(&gb, buf + HEADER_SIZE, buf_size - HEADER_SIZE)) < 0) return ret; - - mb_width = FFALIGN(width, 16) >> 4; - mb_height = FFALIGN(height, 16) >> 4; dst[0] = c->pic->data[0]; dst[1] = c->pic->data[1]; dst[2] = c->pic->data[2]; @@ -634,39 +574,33 @@ static av_cold int mss4_decode_end(AVCodecContext *avctx) av_frame_free(&c->pic); for (i = 0; i < 3; i++) av_freep(&c->prev_dc[i]); - mss4_free_vlcs(c); return 0; } static av_cold int mss4_decode_init(AVCodecContext *avctx) { + static AVOnce init_static_once = AV_ONCE_INIT; MSS4Context * const c = avctx->priv_data; int i; - if (mss4_init_vlcs(c)) { - av_log(avctx, AV_LOG_ERROR, "Cannot initialise VLCs\n"); - mss4_free_vlcs(c); - return AVERROR(ENOMEM); - } for (i = 0; i < 3; i++) { c->dc_stride[i] = FFALIGN(avctx->width, 16) >> (2 + !!i); c->prev_dc[i] = av_malloc_array(c->dc_stride[i], sizeof(**c->prev_dc)); if (!c->prev_dc[i]) { av_log(avctx, AV_LOG_ERROR, "Cannot allocate buffer\n"); - mss4_free_vlcs(c); return AVERROR(ENOMEM); } } c->pic = av_frame_alloc(); - if (!c->pic) { - mss4_decode_end(avctx); + if (!c->pic) return AVERROR(ENOMEM); - } avctx->pix_fmt = AV_PIX_FMT_YUV444P; + ff_thread_once(&init_static_once, mss4_init_vlcs); + return 0; } @@ -680,4 +614,5 @@ AVCodec ff_mts2_decoder = { .close = mss4_decode_end, .decode = mss4_decode_frame, .capabilities = AV_CODEC_CAP_DR1, + .caps_internal = FF_CODEC_CAP_INIT_CLEANUP | FF_CODEC_CAP_INIT_THREADSAFE, };