From d6902070c52151ec1e8154ce9b22283a1d0bc192 Mon Sep 17 00:00:00 2001 From: Nidhi Makhijani Date: Sun, 6 Jul 2014 19:15:52 +0530 Subject: dsicin: Split audio and video decoder Signed-off-by: Diego Biurrun --- libavcodec/Makefile | 4 +- libavcodec/dsicinaudio.c | 135 ++++++++++++++++ libavcodec/dsicinav.c | 408 ----------------------------------------------- libavcodec/dsicinvideo.c | 301 ++++++++++++++++++++++++++++++++++ 4 files changed, 438 insertions(+), 410 deletions(-) create mode 100644 libavcodec/dsicinaudio.c delete mode 100644 libavcodec/dsicinav.c create mode 100644 libavcodec/dsicinvideo.c diff --git a/libavcodec/Makefile b/libavcodec/Makefile index 0440b94..f865d29 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -156,8 +156,8 @@ OBJS-$(CONFIG_DNXHD_DECODER) += dnxhddec.o dnxhddata.o OBJS-$(CONFIG_DNXHD_ENCODER) += dnxhdenc.o dnxhddata.o OBJS-$(CONFIG_DPX_DECODER) += dpx.o OBJS-$(CONFIG_DPX_ENCODER) += dpxenc.o -OBJS-$(CONFIG_DSICINAUDIO_DECODER) += dsicinav.o -OBJS-$(CONFIG_DSICINVIDEO_DECODER) += dsicinav.o +OBJS-$(CONFIG_DSICINAUDIO_DECODER) += dsicinaudio.o +OBJS-$(CONFIG_DSICINVIDEO_DECODER) += dsicinvideo.o OBJS-$(CONFIG_DVBSUB_DECODER) += dvbsubdec.o OBJS-$(CONFIG_DVBSUB_ENCODER) += dvbsub.o OBJS-$(CONFIG_DVDSUB_DECODER) += dvdsubdec.o diff --git a/libavcodec/dsicinaudio.c b/libavcodec/dsicinaudio.c new file mode 100644 index 0000000..969e4ae --- /dev/null +++ b/libavcodec/dsicinaudio.c @@ -0,0 +1,135 @@ +/* + * Delphine Software International CIN audio decoder + * Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net) + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * Delphine Software International CIN audio decoder + */ + +#include "libavutil/channel_layout.h" + +#include "avcodec.h" +#include "bytestream.h" +#include "internal.h" +#include "mathops.h" + +typedef struct CinAudioContext { + int initial_decode_frame; + int delta; +} CinAudioContext; + + +/* table defining a geometric sequence with multiplier = 32767 ^ (1 / 128) */ +static const int16_t cinaudio_delta16_table[256] = { + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, -30210, -27853, -25680, -23677, -21829, + -20126, -18556, -17108, -15774, -14543, -13408, -12362, -11398, + -10508, -9689, -8933, -8236, -7593, -7001, -6455, -5951, + -5487, -5059, -4664, -4300, -3964, -3655, -3370, -3107, + -2865, -2641, -2435, -2245, -2070, -1908, -1759, -1622, + -1495, -1379, -1271, -1172, -1080, -996, -918, -847, + -781, -720, -663, -612, -564, -520, -479, -442, + -407, -376, -346, -319, -294, -271, -250, -230, + -212, -196, -181, -166, -153, -141, -130, -120, + -111, -102, -94, -87, -80, -74, -68, -62, + -58, -53, -49, -45, -41, -38, -35, -32, + -30, -27, -25, -23, -21, -20, -18, -17, + -15, -14, -13, -12, -11, -10, -9, -8, + -7, -6, -5, -4, -3, -2, -1, 0, + 0, 1, 2, 3, 4, 5, 6, 7, + 8, 9, 10, 11, 12, 13, 14, 15, + 17, 18, 20, 21, 23, 25, 27, 30, + 32, 35, 38, 41, 45, 49, 53, 58, + 62, 68, 74, 80, 87, 94, 102, 111, + 120, 130, 141, 153, 166, 181, 196, 212, + 230, 250, 271, 294, 319, 346, 376, 407, + 442, 479, 520, 564, 612, 663, 720, 781, + 847, 918, 996, 1080, 1172, 1271, 1379, 1495, + 1622, 1759, 1908, 2070, 2245, 2435, 2641, 2865, + 3107, 3370, 3655, 3964, 4300, 4664, 5059, 5487, + 5951, 6455, 7001, 7593, 8236, 8933, 9689, 10508, + 11398, 12362, 13408, 14543, 15774, 17108, 18556, 20126, + 21829, 23677, 25680, 27853, 30210, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0 +}; + +static av_cold int cinaudio_decode_init(AVCodecContext *avctx) +{ + CinAudioContext *cin = avctx->priv_data; + + cin->initial_decode_frame = 1; + cin->delta = 0; + avctx->sample_fmt = AV_SAMPLE_FMT_S16; + avctx->channels = 1; + avctx->channel_layout = AV_CH_LAYOUT_MONO; + + return 0; +} + +static int cinaudio_decode_frame(AVCodecContext *avctx, void *data, + int *got_frame_ptr, AVPacket *avpkt) +{ + AVFrame *frame = data; + const uint8_t *buf = avpkt->data; + CinAudioContext *cin = avctx->priv_data; + const uint8_t *buf_end = buf + avpkt->size; + int16_t *samples; + int delta, ret; + + /* get output buffer */ + frame->nb_samples = avpkt->size - cin->initial_decode_frame; + if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return ret; + } + samples = (int16_t *)frame->data[0]; + + delta = cin->delta; + if (cin->initial_decode_frame) { + cin->initial_decode_frame = 0; + delta = sign_extend(AV_RL16(buf), 16); + buf += 2; + *samples++ = delta; + } + while (buf < buf_end) { + delta += cinaudio_delta16_table[*buf++]; + delta = av_clip_int16(delta); + *samples++ = delta; + } + cin->delta = delta; + + *got_frame_ptr = 1; + + return avpkt->size; +} + +AVCodec ff_dsicinaudio_decoder = { + .name = "dsicinaudio", + .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN audio"), + .type = AVMEDIA_TYPE_AUDIO, + .id = AV_CODEC_ID_DSICINAUDIO, + .priv_data_size = sizeof(CinAudioContext), + .init = cinaudio_decode_init, + .decode = cinaudio_decode_frame, + .capabilities = CODEC_CAP_DR1, +}; diff --git a/libavcodec/dsicinav.c b/libavcodec/dsicinav.c deleted file mode 100644 index 6e26c74..0000000 --- a/libavcodec/dsicinav.c +++ /dev/null @@ -1,408 +0,0 @@ -/* - * Delphine Software International CIN Audio/Video Decoders - * Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net) - * - * This file is part of Libav. - * - * Libav 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. - * - * Libav 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 Libav; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * Delphine Software International CIN audio/video decoders - */ - -#include "libavutil/channel_layout.h" -#include "avcodec.h" -#include "bytestream.h" -#include "internal.h" -#include "mathops.h" - - -typedef enum CinVideoBitmapIndex { - CIN_CUR_BMP = 0, /* current */ - CIN_PRE_BMP = 1, /* previous */ - CIN_INT_BMP = 2 /* intermediate */ -} CinVideoBitmapIndex; - -typedef struct CinVideoContext { - AVCodecContext *avctx; - AVFrame *frame; - unsigned int bitmap_size; - uint32_t palette[256]; - uint8_t *bitmap_table[3]; -} CinVideoContext; - -typedef struct CinAudioContext { - int initial_decode_frame; - int delta; -} CinAudioContext; - - -/* table defining a geometric sequence with multiplier = 32767 ^ (1 / 128) */ -static const int16_t cinaudio_delta16_table[256] = { - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, -30210, -27853, -25680, -23677, -21829, - -20126, -18556, -17108, -15774, -14543, -13408, -12362, -11398, - -10508, -9689, -8933, -8236, -7593, -7001, -6455, -5951, - -5487, -5059, -4664, -4300, -3964, -3655, -3370, -3107, - -2865, -2641, -2435, -2245, -2070, -1908, -1759, -1622, - -1495, -1379, -1271, -1172, -1080, -996, -918, -847, - -781, -720, -663, -612, -564, -520, -479, -442, - -407, -376, -346, -319, -294, -271, -250, -230, - -212, -196, -181, -166, -153, -141, -130, -120, - -111, -102, -94, -87, -80, -74, -68, -62, - -58, -53, -49, -45, -41, -38, -35, -32, - -30, -27, -25, -23, -21, -20, -18, -17, - -15, -14, -13, -12, -11, -10, -9, -8, - -7, -6, -5, -4, -3, -2, -1, 0, - 0, 1, 2, 3, 4, 5, 6, 7, - 8, 9, 10, 11, 12, 13, 14, 15, - 17, 18, 20, 21, 23, 25, 27, 30, - 32, 35, 38, 41, 45, 49, 53, 58, - 62, 68, 74, 80, 87, 94, 102, 111, - 120, 130, 141, 153, 166, 181, 196, 212, - 230, 250, 271, 294, 319, 346, 376, 407, - 442, 479, 520, 564, 612, 663, 720, 781, - 847, 918, 996, 1080, 1172, 1271, 1379, 1495, - 1622, 1759, 1908, 2070, 2245, 2435, 2641, 2865, - 3107, 3370, 3655, 3964, 4300, 4664, 5059, 5487, - 5951, 6455, 7001, 7593, 8236, 8933, 9689, 10508, - 11398, 12362, 13408, 14543, 15774, 17108, 18556, 20126, - 21829, 23677, 25680, 27853, 30210, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0 -}; - - -static av_cold int cinvideo_decode_init(AVCodecContext *avctx) -{ - CinVideoContext *cin = avctx->priv_data; - unsigned int i; - - cin->avctx = avctx; - avctx->pix_fmt = AV_PIX_FMT_PAL8; - - cin->frame = av_frame_alloc(); - if (!cin->frame) - return AVERROR(ENOMEM); - - cin->bitmap_size = avctx->width * avctx->height; - for (i = 0; i < 3; ++i) { - cin->bitmap_table[i] = av_mallocz(cin->bitmap_size); - if (!cin->bitmap_table[i]) - av_log(avctx, AV_LOG_ERROR, "Can't allocate bitmap buffers.\n"); - } - - return 0; -} - -static void cin_apply_delta_data(const unsigned char *src, unsigned char *dst, - int size) -{ - while (size--) - *dst++ += *src++; -} - -static int cin_decode_huffman(const unsigned char *src, int src_size, - unsigned char *dst, int dst_size) -{ - int b, huff_code = 0; - unsigned char huff_code_table[15]; - unsigned char *dst_cur = dst; - unsigned char *dst_end = dst + dst_size; - const unsigned char *src_end = src + src_size; - - memcpy(huff_code_table, src, 15); - src += 15; - - while (src < src_end) { - huff_code = *src++; - if ((huff_code >> 4) == 15) { - b = huff_code << 4; - huff_code = *src++; - *dst_cur++ = b | (huff_code >> 4); - } else - *dst_cur++ = huff_code_table[huff_code >> 4]; - if (dst_cur >= dst_end) - break; - - huff_code &= 15; - if (huff_code == 15) { - *dst_cur++ = *src++; - } else - *dst_cur++ = huff_code_table[huff_code]; - if (dst_cur >= dst_end) - break; - } - - return dst_cur - dst; -} - -static int cin_decode_lzss(const unsigned char *src, int src_size, - unsigned char *dst, int dst_size) -{ - uint16_t cmd; - int i, sz, offset, code; - unsigned char *dst_end = dst + dst_size, *dst_start = dst; - const unsigned char *src_end = src + src_size; - - while (src < src_end && dst < dst_end) { - code = *src++; - for (i = 0; i < 8 && src < src_end && dst < dst_end; ++i) { - if (code & (1 << i)) { - *dst++ = *src++; - } else { - cmd = AV_RL16(src); - src += 2; - offset = cmd >> 4; - if ((int)(dst - dst_start) < offset + 1) - return AVERROR_INVALIDDATA; - sz = (cmd & 0xF) + 2; - /* don't use memcpy/memmove here as the decoding routine - * (ab)uses buffer overlappings to repeat bytes in the - * destination */ - sz = FFMIN(sz, dst_end - dst); - while (sz--) { - *dst = *(dst - offset - 1); - ++dst; - } - } - } - } - - return 0; -} - -static void cin_decode_rle(const unsigned char *src, int src_size, - unsigned char *dst, int dst_size) -{ - int len, code; - unsigned char *dst_end = dst + dst_size; - const unsigned char *src_end = src + src_size; - - while (src < src_end && dst < dst_end) { - code = *src++; - if (code & 0x80) { - if (src >= src_end) - break; - len = code - 0x7F; - memset(dst, *src++, FFMIN(len, dst_end - dst)); - } else { - len = code + 1; - memcpy(dst, src, FFMIN3(len, dst_end - dst, src_end - src)); - src += len; - } - dst += len; - } -} - -static int cinvideo_decode_frame(AVCodecContext *avctx, - void *data, int *got_frame, - AVPacket *avpkt) -{ - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - CinVideoContext *cin = avctx->priv_data; - int i, y, palette_type, palette_colors_count, - bitmap_frame_type, bitmap_frame_size, res = 0; - - palette_type = buf[0]; - palette_colors_count = AV_RL16(buf + 1); - bitmap_frame_type = buf[3]; - buf += 4; - - bitmap_frame_size = buf_size - 4; - - /* handle palette */ - if (bitmap_frame_size < palette_colors_count * (3 + (palette_type != 0))) - return AVERROR_INVALIDDATA; - if (palette_type == 0) { - if (palette_colors_count > 256) - return AVERROR_INVALIDDATA; - for (i = 0; i < palette_colors_count; ++i) { - cin->palette[i] = bytestream_get_le24(&buf); - bitmap_frame_size -= 3; - } - } else { - for (i = 0; i < palette_colors_count; ++i) { - cin->palette[buf[0]] = AV_RL24(buf + 1); - buf += 4; - bitmap_frame_size -= 4; - } - } - - bitmap_frame_size = FFMIN(cin->bitmap_size, bitmap_frame_size); - - /* note: the decoding routines below assumes that - * surface.width = surface.pitch */ - switch (bitmap_frame_type) { - case 9: - cin_decode_rle(buf, bitmap_frame_size, - cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); - break; - case 34: - cin_decode_rle(buf, bitmap_frame_size, - cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); - cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP], - cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); - break; - case 35: - cin_decode_huffman(buf, bitmap_frame_size, - cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size); - cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size, - cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); - break; - case 36: - bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size, - cin->bitmap_table[CIN_INT_BMP], - cin->bitmap_size); - cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size, - cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); - cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP], - cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); - break; - case 37: - cin_decode_huffman(buf, bitmap_frame_size, - cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); - break; - case 38: - res = cin_decode_lzss(buf, bitmap_frame_size, - cin->bitmap_table[CIN_CUR_BMP], - cin->bitmap_size); - if (res < 0) - return res; - break; - case 39: - res = cin_decode_lzss(buf, bitmap_frame_size, - cin->bitmap_table[CIN_CUR_BMP], - cin->bitmap_size); - if (res < 0) - return res; - cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP], - cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); - break; - } - - if ((res = ff_reget_buffer(avctx, cin->frame)) < 0) { - av_log(cin->avctx, AV_LOG_ERROR, - "delphinecinvideo: reget_buffer() failed to allocate a frame\n"); - return res; - } - - memcpy(cin->frame->data[1], cin->palette, sizeof(cin->palette)); - cin->frame->palette_has_changed = 1; - for (y = 0; y < cin->avctx->height; ++y) - memcpy(cin->frame->data[0] + (cin->avctx->height - 1 - y) * cin->frame->linesize[0], - cin->bitmap_table[CIN_CUR_BMP] + y * cin->avctx->width, - cin->avctx->width); - - FFSWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP], - cin->bitmap_table[CIN_PRE_BMP]); - - if ((res = av_frame_ref(data, cin->frame)) < 0) - return res; - - *got_frame = 1; - - return buf_size; -} - -static av_cold int cinvideo_decode_end(AVCodecContext *avctx) -{ - CinVideoContext *cin = avctx->priv_data; - int i; - - av_frame_free(&cin->frame); - - for (i = 0; i < 3; ++i) - av_free(cin->bitmap_table[i]); - - return 0; -} - -static av_cold int cinaudio_decode_init(AVCodecContext *avctx) -{ - CinAudioContext *cin = avctx->priv_data; - - cin->initial_decode_frame = 1; - cin->delta = 0; - avctx->sample_fmt = AV_SAMPLE_FMT_S16; - avctx->channels = 1; - avctx->channel_layout = AV_CH_LAYOUT_MONO; - - return 0; -} - -static int cinaudio_decode_frame(AVCodecContext *avctx, void *data, - int *got_frame_ptr, AVPacket *avpkt) -{ - AVFrame *frame = data; - const uint8_t *buf = avpkt->data; - CinAudioContext *cin = avctx->priv_data; - const uint8_t *buf_end = buf + avpkt->size; - int16_t *samples; - int delta, ret; - - /* get output buffer */ - frame->nb_samples = avpkt->size - cin->initial_decode_frame; - if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) { - av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); - return ret; - } - samples = (int16_t *)frame->data[0]; - - delta = cin->delta; - if (cin->initial_decode_frame) { - cin->initial_decode_frame = 0; - delta = sign_extend(AV_RL16(buf), 16); - buf += 2; - *samples++ = delta; - } - while (buf < buf_end) { - delta += cinaudio_delta16_table[*buf++]; - delta = av_clip_int16(delta); - *samples++ = delta; - } - cin->delta = delta; - - *got_frame_ptr = 1; - - return avpkt->size; -} - -AVCodec ff_dsicinvideo_decoder = { - .name = "dsicinvideo", - .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN video"), - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_DSICINVIDEO, - .priv_data_size = sizeof(CinVideoContext), - .init = cinvideo_decode_init, - .close = cinvideo_decode_end, - .decode = cinvideo_decode_frame, - .capabilities = CODEC_CAP_DR1, -}; - -AVCodec ff_dsicinaudio_decoder = { - .name = "dsicinaudio", - .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN audio"), - .type = AVMEDIA_TYPE_AUDIO, - .id = AV_CODEC_ID_DSICINAUDIO, - .priv_data_size = sizeof(CinAudioContext), - .init = cinaudio_decode_init, - .decode = cinaudio_decode_frame, - .capabilities = CODEC_CAP_DR1, -}; diff --git a/libavcodec/dsicinvideo.c b/libavcodec/dsicinvideo.c new file mode 100644 index 0000000..b56a581 --- /dev/null +++ b/libavcodec/dsicinvideo.c @@ -0,0 +1,301 @@ +/* + * Delphine Software International CIN video decoder + * Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net) + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * Delphine Software International CIN video decoder + */ + +#include "avcodec.h" +#include "bytestream.h" +#include "internal.h" + +typedef enum CinVideoBitmapIndex { + CIN_CUR_BMP = 0, /* current */ + CIN_PRE_BMP = 1, /* previous */ + CIN_INT_BMP = 2 /* intermediate */ +} CinVideoBitmapIndex; + +typedef struct CinVideoContext { + AVCodecContext *avctx; + AVFrame *frame; + unsigned int bitmap_size; + uint32_t palette[256]; + uint8_t *bitmap_table[3]; +} CinVideoContext; + +static av_cold int cinvideo_decode_init(AVCodecContext *avctx) +{ + CinVideoContext *cin = avctx->priv_data; + unsigned int i; + + cin->avctx = avctx; + avctx->pix_fmt = AV_PIX_FMT_PAL8; + + cin->frame = av_frame_alloc(); + if (!cin->frame) + return AVERROR(ENOMEM); + + cin->bitmap_size = avctx->width * avctx->height; + for (i = 0; i < 3; ++i) { + cin->bitmap_table[i] = av_mallocz(cin->bitmap_size); + if (!cin->bitmap_table[i]) + av_log(avctx, AV_LOG_ERROR, "Can't allocate bitmap buffers.\n"); + } + + return 0; +} + +static void cin_apply_delta_data(const unsigned char *src, unsigned char *dst, + int size) +{ + while (size--) + *dst++ += *src++; +} + +static int cin_decode_huffman(const unsigned char *src, int src_size, + unsigned char *dst, int dst_size) +{ + int b, huff_code = 0; + unsigned char huff_code_table[15]; + unsigned char *dst_cur = dst; + unsigned char *dst_end = dst + dst_size; + const unsigned char *src_end = src + src_size; + + memcpy(huff_code_table, src, 15); + src += 15; + + while (src < src_end) { + huff_code = *src++; + if ((huff_code >> 4) == 15) { + b = huff_code << 4; + huff_code = *src++; + *dst_cur++ = b | (huff_code >> 4); + } else + *dst_cur++ = huff_code_table[huff_code >> 4]; + if (dst_cur >= dst_end) + break; + + huff_code &= 15; + if (huff_code == 15) { + *dst_cur++ = *src++; + } else + *dst_cur++ = huff_code_table[huff_code]; + if (dst_cur >= dst_end) + break; + } + + return dst_cur - dst; +} + +static int cin_decode_lzss(const unsigned char *src, int src_size, + unsigned char *dst, int dst_size) +{ + uint16_t cmd; + int i, sz, offset, code; + unsigned char *dst_end = dst + dst_size, *dst_start = dst; + const unsigned char *src_end = src + src_size; + + while (src < src_end && dst < dst_end) { + code = *src++; + for (i = 0; i < 8 && src < src_end && dst < dst_end; ++i) { + if (code & (1 << i)) { + *dst++ = *src++; + } else { + cmd = AV_RL16(src); + src += 2; + offset = cmd >> 4; + if ((int)(dst - dst_start) < offset + 1) + return AVERROR_INVALIDDATA; + sz = (cmd & 0xF) + 2; + /* don't use memcpy/memmove here as the decoding routine + * (ab)uses buffer overlappings to repeat bytes in the + * destination */ + sz = FFMIN(sz, dst_end - dst); + while (sz--) { + *dst = *(dst - offset - 1); + ++dst; + } + } + } + } + + return 0; +} + +static void cin_decode_rle(const unsigned char *src, int src_size, + unsigned char *dst, int dst_size) +{ + int len, code; + unsigned char *dst_end = dst + dst_size; + const unsigned char *src_end = src + src_size; + + while (src < src_end && dst < dst_end) { + code = *src++; + if (code & 0x80) { + if (src >= src_end) + break; + len = code - 0x7F; + memset(dst, *src++, FFMIN(len, dst_end - dst)); + } else { + len = code + 1; + memcpy(dst, src, FFMIN3(len, dst_end - dst, src_end - src)); + src += len; + } + dst += len; + } +} + +static int cinvideo_decode_frame(AVCodecContext *avctx, + void *data, int *got_frame, + AVPacket *avpkt) +{ + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + CinVideoContext *cin = avctx->priv_data; + int i, y, palette_type, palette_colors_count, + bitmap_frame_type, bitmap_frame_size, res = 0; + + palette_type = buf[0]; + palette_colors_count = AV_RL16(buf + 1); + bitmap_frame_type = buf[3]; + buf += 4; + + bitmap_frame_size = buf_size - 4; + + /* handle palette */ + if (bitmap_frame_size < palette_colors_count * (3 + (palette_type != 0))) + return AVERROR_INVALIDDATA; + if (palette_type == 0) { + if (palette_colors_count > 256) + return AVERROR_INVALIDDATA; + for (i = 0; i < palette_colors_count; ++i) { + cin->palette[i] = bytestream_get_le24(&buf); + bitmap_frame_size -= 3; + } + } else { + for (i = 0; i < palette_colors_count; ++i) { + cin->palette[buf[0]] = AV_RL24(buf + 1); + buf += 4; + bitmap_frame_size -= 4; + } + } + + bitmap_frame_size = FFMIN(cin->bitmap_size, bitmap_frame_size); + + /* note: the decoding routines below assumes that + * surface.width = surface.pitch */ + switch (bitmap_frame_type) { + case 9: + cin_decode_rle(buf, bitmap_frame_size, + cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); + break; + case 34: + cin_decode_rle(buf, bitmap_frame_size, + cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); + cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP], + cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); + break; + case 35: + cin_decode_huffman(buf, bitmap_frame_size, + cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size); + cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size, + cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); + break; + case 36: + bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size, + cin->bitmap_table[CIN_INT_BMP], + cin->bitmap_size); + cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size, + cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); + cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP], + cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); + break; + case 37: + cin_decode_huffman(buf, bitmap_frame_size, + cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); + break; + case 38: + res = cin_decode_lzss(buf, bitmap_frame_size, + cin->bitmap_table[CIN_CUR_BMP], + cin->bitmap_size); + if (res < 0) + return res; + break; + case 39: + res = cin_decode_lzss(buf, bitmap_frame_size, + cin->bitmap_table[CIN_CUR_BMP], + cin->bitmap_size); + if (res < 0) + return res; + cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP], + cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size); + break; + } + + if ((res = ff_reget_buffer(avctx, cin->frame)) < 0) { + av_log(cin->avctx, AV_LOG_ERROR, + "delphinecinvideo: reget_buffer() failed to allocate a frame\n"); + return res; + } + + memcpy(cin->frame->data[1], cin->palette, sizeof(cin->palette)); + cin->frame->palette_has_changed = 1; + for (y = 0; y < cin->avctx->height; ++y) + memcpy(cin->frame->data[0] + (cin->avctx->height - 1 - y) * cin->frame->linesize[0], + cin->bitmap_table[CIN_CUR_BMP] + y * cin->avctx->width, + cin->avctx->width); + + FFSWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP], + cin->bitmap_table[CIN_PRE_BMP]); + + if ((res = av_frame_ref(data, cin->frame)) < 0) + return res; + + *got_frame = 1; + + return buf_size; +} + +static av_cold int cinvideo_decode_end(AVCodecContext *avctx) +{ + CinVideoContext *cin = avctx->priv_data; + int i; + + av_frame_free(&cin->frame); + + for (i = 0; i < 3; ++i) + av_free(cin->bitmap_table[i]); + + return 0; +} + +AVCodec ff_dsicinvideo_decoder = { + .name = "dsicinvideo", + .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN video"), + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_DSICINVIDEO, + .priv_data_size = sizeof(CinVideoContext), + .init = cinvideo_decode_init, + .close = cinvideo_decode_end, + .decode = cinvideo_decode_frame, + .capabilities = CODEC_CAP_DR1, +}; -- cgit v1.1