OBJS-$(CONFIG_OPUS_DECODER) += opusdec.o opus.o opus_celt.o \
opus_imdct.o opus_silk.o \
vorbis_data.o
-OBJS-$(CONFIG_PAF_VIDEO_DECODER) += paf.o
-OBJS-$(CONFIG_PAF_AUDIO_DECODER) += paf.o
+OBJS-$(CONFIG_PAF_AUDIO_DECODER) += pafaudio.o
+OBJS-$(CONFIG_PAF_VIDEO_DECODER) += pafvideo.o
OBJS-$(CONFIG_PAM_DECODER) += pnmdec.o pnm.o
OBJS-$(CONFIG_PAM_ENCODER) += pamenc.o
OBJS-$(CONFIG_PBM_DECODER) += pnmdec.o pnm.o
+++ /dev/null
-/*
- * Packed Animation File video and audio decoder
- * Copyright (c) 2012 Paul B Mahol
- *
- * 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
- */
-
-#include "libavutil/imgutils.h"
-#include "libavutil/intreadwrite.h"
-
-#include "avcodec.h"
-#include "bytestream.h"
-#include "copy_block.h"
-#include "internal.h"
-#include "mathops.h"
-
-#define PAF_SOUND_SAMPLES 2205
-#define PAF_SOUND_FRAME_SIZE ((256 + PAF_SOUND_SAMPLES) * 2)
-
-static const uint8_t block_sequences[16][8] = {
- { 0, 0, 0, 0, 0, 0, 0, 0 }, { 2, 0, 0, 0, 0, 0, 0, 0 },
- { 5, 7, 0, 0, 0, 0, 0, 0 }, { 5, 0, 0, 0, 0, 0, 0, 0 },
- { 6, 0, 0, 0, 0, 0, 0, 0 }, { 5, 7, 5, 7, 0, 0, 0, 0 },
- { 5, 7, 5, 0, 0, 0, 0, 0 }, { 5, 7, 6, 0, 0, 0, 0, 0 },
- { 5, 5, 0, 0, 0, 0, 0, 0 }, { 3, 0, 0, 0, 0, 0, 0, 0 },
- { 6, 6, 0, 0, 0, 0, 0, 0 }, { 2, 4, 0, 0, 0, 0, 0, 0 },
- { 2, 4, 5, 7, 0, 0, 0, 0 }, { 2, 4, 5, 0, 0, 0, 0, 0 },
- { 2, 4, 6, 0, 0, 0, 0, 0 }, { 2, 4, 5, 7, 5, 7, 0, 0 },
-};
-
-typedef struct PAFVideoDecContext {
- AVFrame *pic;
- GetByteContext gb;
-
- int width;
- int height;
-
- int current_frame;
- uint8_t *frame[4];
- int frame_size;
- int video_size;
-
- uint8_t *opcodes;
-} PAFVideoDecContext;
-
-static av_cold int paf_video_close(AVCodecContext *avctx)
-{
- PAFVideoDecContext *c = avctx->priv_data;
- int i;
-
- av_frame_free(&c->pic);
-
- for (i = 0; i < 4; i++)
- av_freep(&c->frame[i]);
-
- return 0;
-}
-
-static av_cold int paf_video_init(AVCodecContext *avctx)
-{
- PAFVideoDecContext *c = avctx->priv_data;
- int i;
-
- c->width = avctx->width;
- c->height = avctx->height;
-
- if (avctx->height & 3 || avctx->width & 3) {
- av_log(avctx, AV_LOG_ERROR,
- "width %d and height %d must be multiplie of 4.\n",
- avctx->width, avctx->height);
- return AVERROR_INVALIDDATA;
- }
-
- avctx->pix_fmt = AV_PIX_FMT_PAL8;
-
- c->pic = av_frame_alloc();
- if (!c->pic)
- return AVERROR(ENOMEM);
-
- c->frame_size = avctx->width * FFALIGN(avctx->height, 256);
- c->video_size = avctx->width * avctx->height;
- for (i = 0; i < 4; i++) {
- c->frame[i] = av_mallocz(c->frame_size);
- if (!c->frame[i]) {
- paf_video_close(avctx);
- return AVERROR(ENOMEM);
- }
- }
-
- return 0;
-}
-
-static void read4x4block(PAFVideoDecContext *c, uint8_t *dst, int width)
-{
- int i;
-
- for (i = 0; i < 4; i++) {
- bytestream2_get_buffer(&c->gb, dst, 4);
- dst += width;
- }
-}
-
-static void copy_color_mask(uint8_t *dst, int width, uint8_t mask, uint8_t color)
-{
- int i;
-
- for (i = 0; i < 4; i++) {
- if (mask & (1 << 7 - i))
- dst[i] = color;
- if (mask & (1 << 3 - i))
- dst[width + i] = color;
- }
-}
-
-static void copy_src_mask(uint8_t *dst, int width, uint8_t mask, const uint8_t *src)
-{
- int i;
-
- for (i = 0; i < 4; i++) {
- if (mask & (1 << 7 - i))
- dst[i] = src[i];
- if (mask & (1 << 3 - i))
- dst[width + i] = src[width + i];
- }
-}
-
-static void set_src_position(PAFVideoDecContext *c,
- const uint8_t **p,
- const uint8_t **pend)
-{
- int val = bytestream2_get_be16(&c->gb);
- int page = val >> 14;
- int x = (val & 0x7F);
- int y = ((val >> 7) & 0x7F);
-
- *p = c->frame[page] + x * 2 + y * 2 * c->width;
- *pend = c->frame[page] + c->frame_size;
-}
-
-static int decode_0(PAFVideoDecContext *c, uint8_t *pkt, uint8_t code)
-{
- uint32_t opcode_size, offset;
- uint8_t *dst, *dend, mask = 0, color = 0;
- const uint8_t *src, *send, *opcodes;
- int i, j, op = 0;
-
- i = bytestream2_get_byte(&c->gb);
- if (i) {
- if (code & 0x10) {
- int pos = bytestream2_tell(&c->gb) & 3;
- if (pos)
- bytestream2_skip(&c->gb, 4 - pos);
- }
- do {
- int page, val, x, y;
- val = bytestream2_get_be16(&c->gb);
- page = val >> 14;
- x = (val & 0x7F) * 2;
- y = ((val >> 7) & 0x7F) * 2;
- dst = c->frame[page] + x + y * c->width;
- dend = c->frame[page] + c->frame_size;
- offset = (x & 0x7F) * 2;
- j = bytestream2_get_le16(&c->gb) + offset;
- do {
- offset++;
- if (dst + 3 * c->width + 4 > dend)
- return AVERROR_INVALIDDATA;
- read4x4block(c, dst, c->width);
- if ((offset & 0x3F) == 0)
- dst += c->width * 3;
- dst += 4;
- } while (offset < j);
- } while (--i);
- }
-
- dst = c->frame[c->current_frame];
- dend = c->frame[c->current_frame] + c->frame_size;
- do {
- set_src_position(c, &src, &send);
- if ((src + 3 * c->width + 4 > send) ||
- (dst + 3 * c->width + 4 > dend))
- return AVERROR_INVALIDDATA;
- copy_block4(dst, src, c->width, c->width, 4);
- i++;
- if ((i & 0x3F) == 0)
- dst += c->width * 3;
- dst += 4;
- } while (i < c->video_size / 16);
-
- opcode_size = bytestream2_get_le16(&c->gb);
- bytestream2_skip(&c->gb, 2);
-
- if (bytestream2_get_bytes_left(&c->gb) < opcode_size)
- return AVERROR_INVALIDDATA;
-
- opcodes = pkt + bytestream2_tell(&c->gb);
- bytestream2_skipu(&c->gb, opcode_size);
-
- dst = c->frame[c->current_frame];
-
- for (i = 0; i < c->height; i += 4, dst += c->width * 3)
- for (j = 0; j < c->width; j += 4, dst += 4) {
- int opcode, k = 0;
- if (op > opcode_size)
- return AVERROR_INVALIDDATA;
- if (j & 4) {
- opcode = opcodes[op] & 15;
- op++;
- } else {
- opcode = opcodes[op] >> 4;
- }
-
- while (block_sequences[opcode][k]) {
- offset = c->width * 2;
- code = block_sequences[opcode][k++];
-
- switch (code) {
- case 2:
- offset = 0;
- case 3:
- color = bytestream2_get_byte(&c->gb);
- case 4:
- mask = bytestream2_get_byte(&c->gb);
- copy_color_mask(dst + offset, c->width, mask, color);
- break;
- case 5:
- offset = 0;
- case 6:
- set_src_position(c, &src, &send);
- case 7:
- if (src + offset + c->width + 4 > send)
- return AVERROR_INVALIDDATA;
- mask = bytestream2_get_byte(&c->gb);
- copy_src_mask(dst + offset, c->width, mask, src + offset);
- break;
- }
- }
- }
-
- return 0;
-}
-
-static int paf_video_decode(AVCodecContext *avctx, void *data,
- int *got_frame, AVPacket *pkt)
-{
- PAFVideoDecContext *c = avctx->priv_data;
- uint8_t code, *dst, *end;
- int i, frame, ret;
-
- if ((ret = ff_reget_buffer(avctx, c->pic)) < 0)
- return ret;
-
- bytestream2_init(&c->gb, pkt->data, pkt->size);
-
- code = bytestream2_get_byte(&c->gb);
- if (code & 0x20) { // frame is keyframe
- for (i = 0; i < 4; i++)
- memset(c->frame[i], 0, c->frame_size);
-
- memset(c->pic->data[1], 0, AVPALETTE_SIZE);
- c->current_frame = 0;
- c->pic->key_frame = 1;
- c->pic->pict_type = AV_PICTURE_TYPE_I;
- } else {
- c->pic->key_frame = 0;
- c->pic->pict_type = AV_PICTURE_TYPE_P;
- }
-
- if (code & 0x40) { // palette update
- uint32_t *out = (uint32_t *)c->pic->data[1];
- int index, count;
-
- index = bytestream2_get_byte(&c->gb);
- count = bytestream2_get_byte(&c->gb) + 1;
-
- if (index + count > 256)
- return AVERROR_INVALIDDATA;
- if (bytestream2_get_bytes_left(&c->gb) < 3 * count)
- return AVERROR_INVALIDDATA;
-
- out += index;
- for (i = 0; i < count; i++) {
- unsigned r, g, b;
-
- r = bytestream2_get_byteu(&c->gb);
- r = r << 2 | r >> 4;
- g = bytestream2_get_byteu(&c->gb);
- g = g << 2 | g >> 4;
- b = bytestream2_get_byteu(&c->gb);
- b = b << 2 | b >> 4;
- *out++ = (0xFFU << 24) | (r << 16) | (g << 8) | b;
- }
- c->pic->palette_has_changed = 1;
- }
-
- switch (code & 0x0F) {
- case 0:
- /* Block-based motion compensation using 4x4 blocks with either
- * horizontal or vertical vectors; might incorporate VQ as well. */
- if ((ret = decode_0(c, pkt->data, code)) < 0)
- return ret;
- break;
- case 1:
- /* Uncompressed data. This mode specifies that (width * height) bytes
- * should be copied directly from the encoded buffer into the output. */
- dst = c->frame[c->current_frame];
- // possibly chunk length data
- bytestream2_skip(&c->gb, 2);
- if (bytestream2_get_bytes_left(&c->gb) < c->video_size)
- return AVERROR_INVALIDDATA;
- bytestream2_get_bufferu(&c->gb, dst, c->video_size);
- break;
- case 2:
- /* Copy reference frame: Consume the next byte in the stream as the
- * reference frame (which should be 0, 1, 2, or 3, and should not be
- * the same as the current frame number). */
- frame = bytestream2_get_byte(&c->gb);
- if (frame > 3)
- return AVERROR_INVALIDDATA;
- if (frame != c->current_frame)
- memcpy(c->frame[c->current_frame], c->frame[frame], c->frame_size);
- break;
- case 4:
- /* Run length encoding.*/
- dst = c->frame[c->current_frame];
- end = dst + c->video_size;
-
- bytestream2_skip(&c->gb, 2);
-
- while (dst < end) {
- int8_t code;
- int count;
-
- if (bytestream2_get_bytes_left(&c->gb) < 2)
- return AVERROR_INVALIDDATA;
-
- code = bytestream2_get_byteu(&c->gb);
- count = FFABS(code) + 1;
-
- if (dst + count > end)
- return AVERROR_INVALIDDATA;
- if (code < 0)
- memset(dst, bytestream2_get_byteu(&c->gb), count);
- else
- bytestream2_get_buffer(&c->gb, dst, count);
- dst += count;
- }
- break;
- default:
- avpriv_request_sample(avctx, "unknown/invalid code");
- return AVERROR_INVALIDDATA;
- }
-
- av_image_copy_plane(c->pic->data[0], c->pic->linesize[0],
- c->frame[c->current_frame], c->width,
- c->width, c->height);
-
- c->current_frame = (c->current_frame + 1) & 3;
- if ((ret = av_frame_ref(data, c->pic)) < 0)
- return ret;
-
- *got_frame = 1;
-
- return pkt->size;
-}
-
-static av_cold int paf_audio_init(AVCodecContext *avctx)
-{
- if (avctx->channels != 2) {
- av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n");
- return AVERROR_INVALIDDATA;
- }
-
- avctx->channel_layout = AV_CH_LAYOUT_STEREO;
- avctx->sample_fmt = AV_SAMPLE_FMT_S16;
-
- return 0;
-}
-
-static int paf_audio_decode(AVCodecContext *avctx, void *data,
- int *got_frame, AVPacket *pkt)
-{
- AVFrame *frame = data;
- int16_t *output_samples;
- const uint8_t *src = pkt->data;
- int frames, ret, i, j;
- int16_t cb[256];
-
- frames = pkt->size / PAF_SOUND_FRAME_SIZE;
- if (frames < 1)
- return AVERROR_INVALIDDATA;
-
- frame->nb_samples = PAF_SOUND_SAMPLES * frames;
- if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
- return ret;
-
- output_samples = (int16_t *)frame->data[0];
- // codebook of 256 16-bit samples and 8-bit indices to it
- for (j = 0; j < frames; j++) {
- for (i = 0; i < 256; i++)
- cb[i] = sign_extend(AV_RL16(src + i * 2), 16);
- src += 256 * 2;
- // always 2 channels
- for (i = 0; i < PAF_SOUND_SAMPLES * 2; i++)
- *output_samples++ = cb[*src++];
- }
- *got_frame = 1;
-
- return pkt->size;
-}
-
-#if CONFIG_PAF_VIDEO_DECODER
-AVCodec ff_paf_video_decoder = {
- .name = "paf_video",
- .long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Video"),
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_PAF_VIDEO,
- .priv_data_size = sizeof(PAFVideoDecContext),
- .init = paf_video_init,
- .close = paf_video_close,
- .decode = paf_video_decode,
- .capabilities = CODEC_CAP_DR1,
-};
-#endif
-
-#if CONFIG_PAF_AUDIO_DECODER
-AVCodec ff_paf_audio_decoder = {
- .name = "paf_audio",
- .long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Audio"),
- .type = AVMEDIA_TYPE_AUDIO,
- .id = AV_CODEC_ID_PAF_AUDIO,
- .init = paf_audio_init,
- .decode = paf_audio_decode,
- .capabilities = CODEC_CAP_DR1,
-};
-#endif
--- /dev/null
+/*
+ * Packed Animation File audio decoder
+ * Copyright (c) 2012 Paul B Mahol
+ *
+ * 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
+ */
+
+#include "libavutil/intreadwrite.h"
+
+#include "avcodec.h"
+#include "internal.h"
+#include "mathops.h"
+
+#define PAF_SOUND_SAMPLES 2205
+#define PAF_SOUND_FRAME_SIZE ((256 + PAF_SOUND_SAMPLES) * 2)
+
+static av_cold int paf_audio_init(AVCodecContext *avctx)
+{
+ if (avctx->channels != 2) {
+ av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ avctx->channel_layout = AV_CH_LAYOUT_STEREO;
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+
+ return 0;
+}
+
+static int paf_audio_decode(AVCodecContext *avctx, void *data,
+ int *got_frame, AVPacket *pkt)
+{
+ AVFrame *frame = data;
+ int16_t *output_samples;
+ const uint8_t *src = pkt->data;
+ int frames, ret, i, j;
+ int16_t cb[256];
+
+ frames = pkt->size / PAF_SOUND_FRAME_SIZE;
+ if (frames < 1)
+ return AVERROR_INVALIDDATA;
+
+ frame->nb_samples = PAF_SOUND_SAMPLES * frames;
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
+ return ret;
+
+ output_samples = (int16_t *)frame->data[0];
+ // codebook of 256 16-bit samples and 8-bit indices to it
+ for (j = 0; j < frames; j++) {
+ for (i = 0; i < 256; i++)
+ cb[i] = sign_extend(AV_RL16(src + i * 2), 16);
+ src += 256 * 2;
+ // always 2 channels
+ for (i = 0; i < PAF_SOUND_SAMPLES * 2; i++)
+ *output_samples++ = cb[*src++];
+ }
+ *got_frame = 1;
+
+ return pkt->size;
+}
+
+AVCodec ff_paf_audio_decoder = {
+ .name = "paf_audio",
+ .long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Audio"),
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_PAF_AUDIO,
+ .init = paf_audio_init,
+ .decode = paf_audio_decode,
+ .capabilities = CODEC_CAP_DR1,
+};
--- /dev/null
+/*
+ * Packed Animation File video decoder
+ * Copyright (c) 2012 Paul B Mahol
+ *
+ * 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
+ */
+
+#include "libavutil/imgutils.h"
+
+#include "avcodec.h"
+#include "bytestream.h"
+#include "copy_block.h"
+#include "internal.h"
+
+static const uint8_t block_sequences[16][8] = {
+ { 0, 0, 0, 0, 0, 0, 0, 0 }, { 2, 0, 0, 0, 0, 0, 0, 0 },
+ { 5, 7, 0, 0, 0, 0, 0, 0 }, { 5, 0, 0, 0, 0, 0, 0, 0 },
+ { 6, 0, 0, 0, 0, 0, 0, 0 }, { 5, 7, 5, 7, 0, 0, 0, 0 },
+ { 5, 7, 5, 0, 0, 0, 0, 0 }, { 5, 7, 6, 0, 0, 0, 0, 0 },
+ { 5, 5, 0, 0, 0, 0, 0, 0 }, { 3, 0, 0, 0, 0, 0, 0, 0 },
+ { 6, 6, 0, 0, 0, 0, 0, 0 }, { 2, 4, 0, 0, 0, 0, 0, 0 },
+ { 2, 4, 5, 7, 0, 0, 0, 0 }, { 2, 4, 5, 0, 0, 0, 0, 0 },
+ { 2, 4, 6, 0, 0, 0, 0, 0 }, { 2, 4, 5, 7, 5, 7, 0, 0 },
+};
+
+typedef struct PAFVideoDecContext {
+ AVFrame *pic;
+ GetByteContext gb;
+
+ int width;
+ int height;
+
+ int current_frame;
+ uint8_t *frame[4];
+ int frame_size;
+ int video_size;
+
+ uint8_t *opcodes;
+} PAFVideoDecContext;
+
+static av_cold int paf_video_close(AVCodecContext *avctx)
+{
+ PAFVideoDecContext *c = avctx->priv_data;
+ int i;
+
+ av_frame_free(&c->pic);
+
+ for (i = 0; i < 4; i++)
+ av_freep(&c->frame[i]);
+
+ return 0;
+}
+
+static av_cold int paf_video_init(AVCodecContext *avctx)
+{
+ PAFVideoDecContext *c = avctx->priv_data;
+ int i;
+
+ c->width = avctx->width;
+ c->height = avctx->height;
+
+ if (avctx->height & 3 || avctx->width & 3) {
+ av_log(avctx, AV_LOG_ERROR,
+ "width %d and height %d must be multiplie of 4.\n",
+ avctx->width, avctx->height);
+ return AVERROR_INVALIDDATA;
+ }
+
+ avctx->pix_fmt = AV_PIX_FMT_PAL8;
+
+ c->pic = av_frame_alloc();
+ if (!c->pic)
+ return AVERROR(ENOMEM);
+
+ c->frame_size = avctx->width * FFALIGN(avctx->height, 256);
+ c->video_size = avctx->width * avctx->height;
+ for (i = 0; i < 4; i++) {
+ c->frame[i] = av_mallocz(c->frame_size);
+ if (!c->frame[i]) {
+ paf_video_close(avctx);
+ return AVERROR(ENOMEM);
+ }
+ }
+
+ return 0;
+}
+
+static void read4x4block(PAFVideoDecContext *c, uint8_t *dst, int width)
+{
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ bytestream2_get_buffer(&c->gb, dst, 4);
+ dst += width;
+ }
+}
+
+static void copy_color_mask(uint8_t *dst, int width, uint8_t mask, uint8_t color)
+{
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ if (mask & (1 << 7 - i))
+ dst[i] = color;
+ if (mask & (1 << 3 - i))
+ dst[width + i] = color;
+ }
+}
+
+static void copy_src_mask(uint8_t *dst, int width, uint8_t mask, const uint8_t *src)
+{
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ if (mask & (1 << 7 - i))
+ dst[i] = src[i];
+ if (mask & (1 << 3 - i))
+ dst[width + i] = src[width + i];
+ }
+}
+
+static void set_src_position(PAFVideoDecContext *c,
+ const uint8_t **p,
+ const uint8_t **pend)
+{
+ int val = bytestream2_get_be16(&c->gb);
+ int page = val >> 14;
+ int x = (val & 0x7F);
+ int y = ((val >> 7) & 0x7F);
+
+ *p = c->frame[page] + x * 2 + y * 2 * c->width;
+ *pend = c->frame[page] + c->frame_size;
+}
+
+static int decode_0(PAFVideoDecContext *c, uint8_t *pkt, uint8_t code)
+{
+ uint32_t opcode_size, offset;
+ uint8_t *dst, *dend, mask = 0, color = 0;
+ const uint8_t *src, *send, *opcodes;
+ int i, j, op = 0;
+
+ i = bytestream2_get_byte(&c->gb);
+ if (i) {
+ if (code & 0x10) {
+ int pos = bytestream2_tell(&c->gb) & 3;
+ if (pos)
+ bytestream2_skip(&c->gb, 4 - pos);
+ }
+ do {
+ int page, val, x, y;
+ val = bytestream2_get_be16(&c->gb);
+ page = val >> 14;
+ x = (val & 0x7F) * 2;
+ y = ((val >> 7) & 0x7F) * 2;
+ dst = c->frame[page] + x + y * c->width;
+ dend = c->frame[page] + c->frame_size;
+ offset = (x & 0x7F) * 2;
+ j = bytestream2_get_le16(&c->gb) + offset;
+ do {
+ offset++;
+ if (dst + 3 * c->width + 4 > dend)
+ return AVERROR_INVALIDDATA;
+ read4x4block(c, dst, c->width);
+ if ((offset & 0x3F) == 0)
+ dst += c->width * 3;
+ dst += 4;
+ } while (offset < j);
+ } while (--i);
+ }
+
+ dst = c->frame[c->current_frame];
+ dend = c->frame[c->current_frame] + c->frame_size;
+ do {
+ set_src_position(c, &src, &send);
+ if ((src + 3 * c->width + 4 > send) ||
+ (dst + 3 * c->width + 4 > dend))
+ return AVERROR_INVALIDDATA;
+ copy_block4(dst, src, c->width, c->width, 4);
+ i++;
+ if ((i & 0x3F) == 0)
+ dst += c->width * 3;
+ dst += 4;
+ } while (i < c->video_size / 16);
+
+ opcode_size = bytestream2_get_le16(&c->gb);
+ bytestream2_skip(&c->gb, 2);
+
+ if (bytestream2_get_bytes_left(&c->gb) < opcode_size)
+ return AVERROR_INVALIDDATA;
+
+ opcodes = pkt + bytestream2_tell(&c->gb);
+ bytestream2_skipu(&c->gb, opcode_size);
+
+ dst = c->frame[c->current_frame];
+
+ for (i = 0; i < c->height; i += 4, dst += c->width * 3)
+ for (j = 0; j < c->width; j += 4, dst += 4) {
+ int opcode, k = 0;
+ if (op > opcode_size)
+ return AVERROR_INVALIDDATA;
+ if (j & 4) {
+ opcode = opcodes[op] & 15;
+ op++;
+ } else {
+ opcode = opcodes[op] >> 4;
+ }
+
+ while (block_sequences[opcode][k]) {
+ offset = c->width * 2;
+ code = block_sequences[opcode][k++];
+
+ switch (code) {
+ case 2:
+ offset = 0;
+ case 3:
+ color = bytestream2_get_byte(&c->gb);
+ case 4:
+ mask = bytestream2_get_byte(&c->gb);
+ copy_color_mask(dst + offset, c->width, mask, color);
+ break;
+ case 5:
+ offset = 0;
+ case 6:
+ set_src_position(c, &src, &send);
+ case 7:
+ if (src + offset + c->width + 4 > send)
+ return AVERROR_INVALIDDATA;
+ mask = bytestream2_get_byte(&c->gb);
+ copy_src_mask(dst + offset, c->width, mask, src + offset);
+ break;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int paf_video_decode(AVCodecContext *avctx, void *data,
+ int *got_frame, AVPacket *pkt)
+{
+ PAFVideoDecContext *c = avctx->priv_data;
+ uint8_t code, *dst, *end;
+ int i, frame, ret;
+
+ if ((ret = ff_reget_buffer(avctx, c->pic)) < 0)
+ return ret;
+
+ bytestream2_init(&c->gb, pkt->data, pkt->size);
+
+ code = bytestream2_get_byte(&c->gb);
+ if (code & 0x20) { // frame is keyframe
+ for (i = 0; i < 4; i++)
+ memset(c->frame[i], 0, c->frame_size);
+
+ memset(c->pic->data[1], 0, AVPALETTE_SIZE);
+ c->current_frame = 0;
+ c->pic->key_frame = 1;
+ c->pic->pict_type = AV_PICTURE_TYPE_I;
+ } else {
+ c->pic->key_frame = 0;
+ c->pic->pict_type = AV_PICTURE_TYPE_P;
+ }
+
+ if (code & 0x40) { // palette update
+ uint32_t *out = (uint32_t *)c->pic->data[1];
+ int index, count;
+
+ index = bytestream2_get_byte(&c->gb);
+ count = bytestream2_get_byte(&c->gb) + 1;
+
+ if (index + count > 256)
+ return AVERROR_INVALIDDATA;
+ if (bytestream2_get_bytes_left(&c->gb) < 3 * count)
+ return AVERROR_INVALIDDATA;
+
+ out += index;
+ for (i = 0; i < count; i++) {
+ unsigned r, g, b;
+
+ r = bytestream2_get_byteu(&c->gb);
+ r = r << 2 | r >> 4;
+ g = bytestream2_get_byteu(&c->gb);
+ g = g << 2 | g >> 4;
+ b = bytestream2_get_byteu(&c->gb);
+ b = b << 2 | b >> 4;
+ *out++ = (0xFFU << 24) | (r << 16) | (g << 8) | b;
+ }
+ c->pic->palette_has_changed = 1;
+ }
+
+ switch (code & 0x0F) {
+ case 0:
+ /* Block-based motion compensation using 4x4 blocks with either
+ * horizontal or vertical vectors; might incorporate VQ as well. */
+ if ((ret = decode_0(c, pkt->data, code)) < 0)
+ return ret;
+ break;
+ case 1:
+ /* Uncompressed data. This mode specifies that (width * height) bytes
+ * should be copied directly from the encoded buffer into the output. */
+ dst = c->frame[c->current_frame];
+ // possibly chunk length data
+ bytestream2_skip(&c->gb, 2);
+ if (bytestream2_get_bytes_left(&c->gb) < c->video_size)
+ return AVERROR_INVALIDDATA;
+ bytestream2_get_bufferu(&c->gb, dst, c->video_size);
+ break;
+ case 2:
+ /* Copy reference frame: Consume the next byte in the stream as the
+ * reference frame (which should be 0, 1, 2, or 3, and should not be
+ * the same as the current frame number). */
+ frame = bytestream2_get_byte(&c->gb);
+ if (frame > 3)
+ return AVERROR_INVALIDDATA;
+ if (frame != c->current_frame)
+ memcpy(c->frame[c->current_frame], c->frame[frame], c->frame_size);
+ break;
+ case 4:
+ /* Run length encoding.*/
+ dst = c->frame[c->current_frame];
+ end = dst + c->video_size;
+
+ bytestream2_skip(&c->gb, 2);
+
+ while (dst < end) {
+ int8_t code;
+ int count;
+
+ if (bytestream2_get_bytes_left(&c->gb) < 2)
+ return AVERROR_INVALIDDATA;
+
+ code = bytestream2_get_byteu(&c->gb);
+ count = FFABS(code) + 1;
+
+ if (dst + count > end)
+ return AVERROR_INVALIDDATA;
+ if (code < 0)
+ memset(dst, bytestream2_get_byteu(&c->gb), count);
+ else
+ bytestream2_get_buffer(&c->gb, dst, count);
+ dst += count;
+ }
+ break;
+ default:
+ avpriv_request_sample(avctx, "unknown/invalid code");
+ return AVERROR_INVALIDDATA;
+ }
+
+ av_image_copy_plane(c->pic->data[0], c->pic->linesize[0],
+ c->frame[c->current_frame], c->width,
+ c->width, c->height);
+
+ c->current_frame = (c->current_frame + 1) & 3;
+ if ((ret = av_frame_ref(data, c->pic)) < 0)
+ return ret;
+
+ *got_frame = 1;
+
+ return pkt->size;
+}
+
+AVCodec ff_paf_video_decoder = {
+ .name = "paf_video",
+ .long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Video"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_PAF_VIDEO,
+ .priv_data_size = sizeof(PAFVideoDecContext),
+ .init = paf_video_init,
+ .close = paf_video_close,
+ .decode = paf_video_decode,
+ .capabilities = CODEC_CAP_DR1,
+};
projects / platform / upstream / libav.git / commitdiff