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Diffstat (limited to 'ffmpeg1/libavcodec/dsicinav.c')
-rw-r--r--ffmpeg1/libavcodec/dsicinav.c409
1 files changed, 409 insertions, 0 deletions
diff --git a/ffmpeg1/libavcodec/dsicinav.c b/ffmpeg1/libavcodec/dsicinav.c
new file mode 100644
index 0000000..f0e8f02
--- /dev/null
+++ b/ffmpeg1/libavcodec/dsicinav.c
@@ -0,0 +1,409 @@
+/*
+ * Delphine Software International CIN Audio/Video Decoders
+ * Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; 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 void destroy_buffers(CinVideoContext *cin)
+{
+ int i;
+
+ for (i = 0; i < 3; ++i)
+ av_freep(&cin->bitmap_table[i]);
+}
+
+static av_cold int allocate_buffers(CinVideoContext *cin)
+{
+ int i;
+
+ for (i = 0; i < 3; ++i) {
+ cin->bitmap_table[i] = av_mallocz(cin->bitmap_size);
+ if (!cin->bitmap_table[i]) {
+ av_log(cin->avctx, AV_LOG_ERROR, "Can't allocate bitmap buffers.\n");
+ destroy_buffers(cin);
+ return AVERROR(ENOMEM);
+ }
+ }
+
+ return 0;
+}
+
+static av_cold int cinvideo_decode_init(AVCodecContext *avctx)
+{
+ CinVideoContext *cin = avctx->priv_data;
+
+ cin->avctx = avctx;
+ avctx->pix_fmt = AV_PIX_FMT_PAL8;
+
+ avcodec_get_frame_defaults(&cin->frame);
+
+ cin->bitmap_size = avctx->width * avctx->height;
+ if (allocate_buffers(cin))
+ return AVERROR(ENOMEM);
+
+ 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 int 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 + 1 < src_end && dst < dst_end) {
+ code = *src++;
+ if (code & 0x80) {
+ len = code - 0x7F;
+ memset(dst, *src++, FFMIN(len, dst_end - dst));
+ } else {
+ len = code + 1;
+ if (len > src_end-src) {
+ av_log(NULL, AV_LOG_ERROR, "RLE overread\n");
+ return AVERROR_INVALIDDATA;
+ }
+ memcpy(dst, src, FFMIN(len, dst_end - dst));
+ src += len;
+ }
+ dst += len;
+ }
+ return 0;
+}
+
+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] = 0xFFU << 24 | bytestream_get_le24(&buf);
+ bitmap_frame_size -= 3;
+ }
+ } else {
+ for (i = 0; i < palette_colors_count; ++i) {
+ cin->palette[buf[0]] = 0xFFU << 24 | AV_RL24(buf+1);
+ buf += 4;
+ bitmap_frame_size -= 4;
+ }
+ }
+
+ /* 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:
+ 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);
+ 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)
+ 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;
+
+ av_frame_unref(&cin->frame);
+
+ destroy_buffers(cin);
+
+ 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)
+ 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",
+ .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,
+ .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN video"),
+};
+
+AVCodec ff_dsicinaudio_decoder = {
+ .name = "dsicinaudio",
+ .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,
+ .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN audio"),
+};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 19:36:17 +0000