X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fmotionpixels.c;h=6c1efadd56114a304e8d084495ca516ba8f391cf;hb=ed4b757177f9b563412cdbc8ee3405d82e10fc05;hp=227b178135781f2eedcd4cdbd02965dc94773867;hpb=f0a75e66b94c671f62357bdadf64d857f92f8f42;p=ffmpeg diff --git a/libavcodec/motionpixels.c b/libavcodec/motionpixels.c index 227b1781357..6c1efadd561 100644 --- a/libavcodec/motionpixels.c +++ b/libavcodec/motionpixels.c @@ -2,32 +2,31 @@ * Motion Pixels Video Decoder * Copyright (c) 2008 Gregory Montoir (cyx@users.sourceforge.net) * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * 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. * - * FFmpeg is distributed in the hope that it will be useful, + * 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 FFmpeg; if not, write to the Free Software + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "avcodec.h" #include "get_bits.h" #include "dsputil.h" +#include "internal.h" #define MAX_HUFF_CODES 16 -typedef struct YuvPixel { - int8_t y, v, u; -} YuvPixel; +#include "motionpixels_tablegen.h" typedef struct HuffCode { int code; @@ -37,7 +36,7 @@ typedef struct HuffCode { typedef struct MotionPixelsContext { AVCodecContext *avctx; - AVFrame frame; + AVFrame *frame; DSPContext dsp; uint8_t *changes_map; int offset_bits_len; @@ -51,67 +50,40 @@ typedef struct MotionPixelsContext { int bswapbuf_size; } MotionPixelsContext; -static YuvPixel mp_rgb_yuv_table[1 << 15]; - -static int mp_yuv_to_rgb(int y, int v, int u, int clip_rgb) { - static const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; - int r, g, b; - - r = (1000 * y + 701 * v) / 1000; - g = (1000 * y - 357 * v - 172 * u) / 1000; - b = (1000 * y + 886 * u) / 1000; - if (clip_rgb) - return ((cm[r * 8] & 0xF8) << 7) | ((cm[g * 8] & 0xF8) << 2) | (cm[b * 8] >> 3); - if ((unsigned)r < 32 && (unsigned)g < 32 && (unsigned)b < 32) - return (r << 10) | (g << 5) | b; - return 1 << 15; -} - -static void mp_set_zero_yuv(YuvPixel *p) +static av_cold int mp_decode_end(AVCodecContext *avctx) { - int i, j; - - for (i = 0; i < 31; ++i) { - for (j = 31; j > i; --j) - if (!(p[j].u | p[j].v | p[j].y)) - p[j] = p[j - 1]; - for (j = 0; j < 31 - i; ++j) - if (!(p[j].u | p[j].v | p[j].y)) - p[j] = p[j + 1]; - } -} + MotionPixelsContext *mp = avctx->priv_data; -static void mp_build_rgb_yuv_table(YuvPixel *p) -{ - int y, v, u, i; - - for (y = 0; y <= 31; ++y) - for (v = -31; v <= 31; ++v) - for (u = -31; u <= 31; ++u) { - i = mp_yuv_to_rgb(y, v, u, 0); - if (i < (1 << 15) && !(p[i].u | p[i].v | p[i].y)) { - p[i].y = y; - p[i].v = v; - p[i].u = u; - } - } - for (i = 0; i < 1024; ++i) - mp_set_zero_yuv(p + i * 32); + av_freep(&mp->changes_map); + av_freep(&mp->vpt); + av_freep(&mp->hpt); + av_freep(&mp->bswapbuf); + av_frame_free(&mp->frame); + + return 0; } static av_cold int mp_decode_init(AVCodecContext *avctx) { MotionPixelsContext *mp = avctx->priv_data; + int w4 = (avctx->width + 3) & ~3; + int h4 = (avctx->height + 3) & ~3; - if (!mp_rgb_yuv_table[0].u) { - mp_build_rgb_yuv_table(mp_rgb_yuv_table); - } + motionpixels_tableinit(); mp->avctx = avctx; - dsputil_init(&mp->dsp, avctx); - mp->changes_map = av_mallocz(avctx->width * avctx->height); + ff_dsputil_init(&mp->dsp, avctx); + mp->changes_map = av_mallocz(avctx->width * h4); mp->offset_bits_len = av_log2(avctx->width * avctx->height) + 1; mp->vpt = av_mallocz(avctx->height * sizeof(YuvPixel)); - mp->hpt = av_mallocz(avctx->height * avctx->width / 16 * sizeof(YuvPixel)); + mp->hpt = av_mallocz(h4 * w4 / 16 * sizeof(YuvPixel)); + avctx->pix_fmt = AV_PIX_FMT_RGB555; + + mp->frame = av_frame_alloc(); + if (!mp->frame) { + mp_decode_end(avctx); + return AVERROR(ENOMEM); + } + return 0; } @@ -132,14 +104,14 @@ static void mp_read_changes_map(MotionPixelsContext *mp, GetBitContext *gb, int continue; w = FFMIN(w, mp->avctx->width - x); h = FFMIN(h, mp->avctx->height - y); - pixels = (uint16_t *)&mp->frame.data[0][y * mp->frame.linesize[0] + x * 2]; + pixels = (uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2]; while (h--) { mp->changes_map[offset] = w; if (read_color) for (i = 0; i < w; ++i) pixels[i] = color; offset += mp->avctx->width; - pixels += mp->frame.linesize[0] / 2; + pixels += mp->frame->linesize[0] / 2; } } } @@ -191,7 +163,7 @@ static YuvPixel mp_get_yuv_from_rgb(MotionPixelsContext *mp, int x, int y) { int color; - color = *(uint16_t *)&mp->frame.data[0][y * mp->frame.linesize[0] + x * 2]; + color = *(uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2]; return mp_rgb_yuv_table[color]; } @@ -200,7 +172,7 @@ static void mp_set_rgb_from_yuv(MotionPixelsContext *mp, int x, int y, const Yuv int color; color = mp_yuv_to_rgb(p->y, p->v, p->u, 1); - *(uint16_t *)&mp->frame.data[0][y * mp->frame.linesize[0] + x * 2] = color; + *(uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2] = color; } static int mp_get_vlc(MotionPixelsContext *mp, GetBitContext *gb) @@ -208,6 +180,7 @@ static int mp_get_vlc(MotionPixelsContext *mp, GetBitContext *gb) int i; i = (mp->codes_count == 1) ? 0 : get_vlc2(gb, mp->vlc.table, mp->max_codes_bits, 1); + i = FFMIN(i, FF_ARRAY_ELEMS(mp->codes) - 1); return mp->codes[i].delta; } @@ -239,10 +212,13 @@ static void mp_decode_line(MotionPixelsContext *mp, GetBitContext *gb, int y) p = mp_get_yuv_from_rgb(mp, x - 1, y); } else { p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb)); + p.y = av_clip(p.y, 0, 31); if ((x & 3) == 0) { if ((y & 3) == 0) { p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb)); + p.v = av_clip(p.v, -32, 31); p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb)); + p.u = av_clip(p.u, -32, 31); mp->hpt[((y / 4) * mp->avctx->width + x) / 4] = p; } else { p.v = mp->hpt[((y / 4) * mp->avctx->width + x) / 4].v; @@ -266,9 +242,12 @@ static void mp_decode_frame_helper(MotionPixelsContext *mp, GetBitContext *gb) p = mp_get_yuv_from_rgb(mp, 0, y); } else { p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb)); + p.y = av_clip(p.y, 0, 31); if ((y & 3) == 0) { p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb)); + p.v = av_clip(p.v, -32, 31); p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb)); + p.u = av_clip(p.u, -32, 31); } mp->vpt[y] = p; mp_set_rgb_from_yuv(mp, 0, y, &p); @@ -280,20 +259,18 @@ static void mp_decode_frame_helper(MotionPixelsContext *mp, GetBitContext *gb) } static int mp_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, + void *data, int *got_frame, AVPacket *avpkt) { const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; MotionPixelsContext *mp = avctx->priv_data; GetBitContext gb; - int i, count1, count2, sz; + int i, count1, count2, sz, ret; - mp->frame.reference = 1; - mp->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE; - if (avctx->reget_buffer(avctx, &mp->frame)) { + if ((ret = ff_reget_buffer(avctx, mp->frame)) < 0) { av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); - return -1; + return ret; } /* le32 bitstream msb first */ @@ -303,6 +280,7 @@ static int mp_decode_frame(AVCodecContext *avctx, mp->dsp.bswap_buf((uint32_t *)mp->bswapbuf, (const uint32_t *)buf, buf_size / 4); if (buf_size & 3) memcpy(mp->bswapbuf + (buf_size & ~3), buf + (buf_size & ~3), buf_size & 3); + memset(mp->bswapbuf + buf_size, 0, FF_INPUT_BUFFER_PADDING_SIZE); init_get_bits(&gb, mp->bswapbuf, buf_size * 8); memset(mp->changes_map, 0, avctx->width * avctx->height); @@ -318,7 +296,7 @@ static int mp_decode_frame(AVCodecContext *avctx, goto end; if (mp->changes_map[0] == 0) { - *(uint16_t *)mp->frame.data[0] = get_bits(&gb, 15); + *(uint16_t *)mp->frame->data[0] = get_bits(&gb, 15); mp->changes_map[0] = 1; } mp_read_codes_table(mp, &gb); @@ -329,39 +307,28 @@ static int mp_decode_frame(AVCodecContext *avctx, if (sz == 0) goto end; - init_vlc(&mp->vlc, mp->max_codes_bits, mp->codes_count, &mp->codes[0].size, sizeof(HuffCode), 1, &mp->codes[0].code, sizeof(HuffCode), 4, 0); + if (mp->max_codes_bits <= 0) + goto end; + if (init_vlc(&mp->vlc, mp->max_codes_bits, mp->codes_count, &mp->codes[0].size, sizeof(HuffCode), 1, &mp->codes[0].code, sizeof(HuffCode), 4, 0)) + goto end; mp_decode_frame_helper(mp, &gb); - free_vlc(&mp->vlc); + ff_free_vlc(&mp->vlc); end: - *data_size = sizeof(AVFrame); - *(AVFrame *)data = mp->frame; + if ((ret = av_frame_ref(data, mp->frame)) < 0) + return ret; + *got_frame = 1; return buf_size; } -static av_cold int mp_decode_end(AVCodecContext *avctx) -{ - MotionPixelsContext *mp = avctx->priv_data; - - av_freep(&mp->changes_map); - av_freep(&mp->vpt); - av_freep(&mp->hpt); - av_freep(&mp->bswapbuf); - if (mp->frame.data[0]) - avctx->release_buffer(avctx, &mp->frame); - - return 0; -} - -AVCodec motionpixels_decoder = { - "motionpixels", - CODEC_TYPE_VIDEO, - CODEC_ID_MOTIONPIXELS, - sizeof(MotionPixelsContext), - mp_decode_init, - NULL, - mp_decode_end, - mp_decode_frame, - CODEC_CAP_DR1, - .long_name = NULL_IF_CONFIG_SMALL("Motion Pixels video"), +AVCodec ff_motionpixels_decoder = { + .name = "motionpixels", + .long_name = NULL_IF_CONFIG_SMALL("Motion Pixels video"), + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_MOTIONPIXELS, + .priv_data_size = sizeof(MotionPixelsContext), + .init = mp_decode_init, + .close = mp_decode_end, + .decode = mp_decode_frame, + .capabilities = CODEC_CAP_DR1, };