diff options
Diffstat (limited to 'ffmpeg/libavcodec/mimic.c')
| -rw-r--r-- | ffmpeg/libavcodec/mimic.c | 479 |
1 files changed, 0 insertions, 479 deletions
diff --git a/ffmpeg/libavcodec/mimic.c b/ffmpeg/libavcodec/mimic.c deleted file mode 100644 index 31d6393..0000000 --- a/ffmpeg/libavcodec/mimic.c +++ /dev/null @@ -1,479 +0,0 @@ -/* - * Copyright (C) 2005 Ole André Vadla Ravnås <oleavr@gmail.com> - * Copyright (C) 2008 Ramiro Polla - * - * 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 - */ - -#include <stdlib.h> -#include <string.h> -#include <stdint.h> - -#include "avcodec.h" -#include "internal.h" -#include "get_bits.h" -#include "bytestream.h" -#include "dsputil.h" -#include "hpeldsp.h" -#include "thread.h" - -#define MIMIC_HEADER_SIZE 20 - -typedef struct { - AVCodecContext *avctx; - - int num_vblocks[3]; - int num_hblocks[3]; - - void *swap_buf; - int swap_buf_size; - - int cur_index; - int prev_index; - - ThreadFrame frames [16]; - AVPicture flipped_ptrs[16]; - - DECLARE_ALIGNED(16, int16_t, dct_block)[64]; - - GetBitContext gb; - ScanTable scantable; - DSPContext dsp; - HpelDSPContext hdsp; - VLC vlc; - - /* Kept in the context so multithreading can have a constant to read from */ - int next_cur_index; - int next_prev_index; -} MimicContext; - -static const uint32_t huffcodes[] = { - 0x0000000a, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x0000000b, - 0x0000001b, 0x00000038, 0x00000078, 0x00000079, 0x0000007a, 0x000000f9, - 0x000000fa, 0x000003fb, 0x000007f8, 0x000007f9, 0x000007fa, 0x000007fb, - 0x00000ff8, 0x00000ff9, 0x00000001, 0x00000039, 0x0000007b, 0x000000fb, - 0x000001f8, 0x000001f9, 0x00000ffa, 0x00000ffb, 0x00001ff8, 0x00001ff9, - 0x00001ffa, 0x00001ffb, 0x00003ff8, 0x00003ff9, 0x00003ffa, 0x00000000, - 0x00000004, 0x0000003a, 0x000001fa, 0x00003ffb, 0x00007ff8, 0x00007ff9, - 0x00007ffa, 0x00007ffb, 0x0000fff8, 0x0000fff9, 0x0000fffa, 0x0000fffb, - 0x0001fff8, 0x0001fff9, 0x0001fffa, 0x00000000, 0x0000000c, 0x000000f8, - 0x000001fb, 0x0001fffb, 0x0003fff8, 0x0003fff9, 0x0003fffa, 0x0003fffb, - 0x0007fff8, 0x0007fff9, 0x0007fffa, 0x0007fffb, 0x000ffff8, 0x000ffff9, - 0x000ffffa, 0x00000000, 0x0000001a, 0x000003f8, 0x000ffffb, 0x001ffff8, - 0x001ffff9, 0x001ffffa, 0x001ffffb, 0x003ffff8, 0x003ffff9, 0x003ffffa, - 0x003ffffb, 0x007ffff8, 0x007ffff9, 0x007ffffa, 0x007ffffb, 0x00000000, - 0x0000003b, 0x000003f9, 0x00fffff8, 0x00fffff9, 0x00fffffa, 0x00fffffb, - 0x01fffff8, 0x01fffff9, 0x01fffffa, 0x01fffffb, 0x03fffff8, 0x03fffff9, - 0x03fffffa, 0x03fffffb, 0x07fffff8, 0x00000000, 0x000003fa, 0x07fffff9, - 0x07fffffa, 0x07fffffb, 0x0ffffff8, 0x0ffffff9, 0x0ffffffa, 0x0ffffffb, - 0x1ffffff8, 0x1ffffff9, 0x1ffffffa, 0x1ffffffb, 0x3ffffff8, 0x3ffffff9, - 0x3ffffffa, -}; - -static const uint8_t huffbits[] = { - 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 2, 4, 5, 6, 7, 7, 7, 8, - 8, 10, 11, 11, 11, 11, 12, 12, 2, 6, 7, 8, - 9, 9, 12, 12, 13, 13, 13, 13, 14, 14, 14, 0, - 3, 6, 9, 14, 15, 15, 15, 15, 16, 16, 16, 16, - 17, 17, 17, 0, 4, 8, 9, 17, 18, 18, 18, 18, - 19, 19, 19, 19, 20, 20, 20, 0, 5, 10, 20, 21, - 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, 0, - 6, 10, 24, 24, 24, 24, 25, 25, 25, 25, 26, 26, - 26, 26, 27, 0, 10, 27, 27, 27, 28, 28, 28, 28, - 29, 29, 29, 29, 30, 30, 30, -}; - -static const uint8_t col_zag[64] = { - 0, 8, 1, 2, 9, 16, 24, 17, - 10, 3, 4, 11, 18, 25, 32, 40, - 33, 26, 19, 12, 5, 6, 13, 20, - 27, 34, 41, 48, 56, 49, 42, 35, - 28, 21, 14, 7, 15, 22, 29, 36, - 43, 50, 57, 58, 51, 44, 37, 30, - 23, 31, 38, 45, 52, 59, 39, 46, - 53, 60, 61, 54, 47, 55, 62, 63, -}; - -static av_cold int mimic_decode_end(AVCodecContext *avctx) -{ - MimicContext *ctx = avctx->priv_data; - int i; - - av_freep(&ctx->swap_buf); - ctx->swap_buf_size = 0; - - for (i = 0; i < FF_ARRAY_ELEMS(ctx->frames); i++) { - if (ctx->frames[i].f) - ff_thread_release_buffer(avctx, &ctx->frames[i]); - av_frame_free(&ctx->frames[i].f); - } - - if (!avctx->internal->is_copy) - ff_free_vlc(&ctx->vlc); - - return 0; -} - -static av_cold int mimic_decode_init(AVCodecContext *avctx) -{ - MimicContext *ctx = avctx->priv_data; - int ret, i; - - avctx->internal->allocate_progress = 1; - - ctx->prev_index = 0; - ctx->cur_index = 15; - - if ((ret = init_vlc(&ctx->vlc, 11, FF_ARRAY_ELEMS(huffbits), - huffbits, 1, 1, huffcodes, 4, 4, 0)) < 0) { - av_log(avctx, AV_LOG_ERROR, "error initializing vlc table\n"); - return ret; - } - ff_dsputil_init(&ctx->dsp, avctx); - ff_hpeldsp_init(&ctx->hdsp, avctx->flags); - ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, col_zag); - - for (i = 0; i < FF_ARRAY_ELEMS(ctx->frames); i++) { - ctx->frames[i].f = av_frame_alloc(); - if (!ctx->frames[i].f) { - mimic_decode_end(avctx); - return AVERROR(ENOMEM); - } - } - - return 0; -} - -static int mimic_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from) -{ - MimicContext *dst = avctx->priv_data, *src = avctx_from->priv_data; - int i, ret; - - if (avctx == avctx_from) - return 0; - - dst->cur_index = src->next_cur_index; - dst->prev_index = src->next_prev_index; - - memcpy(dst->flipped_ptrs, src->flipped_ptrs, sizeof(src->flipped_ptrs)); - - for (i = 0; i < FF_ARRAY_ELEMS(dst->frames); i++) { - ff_thread_release_buffer(avctx, &dst->frames[i]); - if (i != src->next_cur_index && src->frames[i].f->data[0]) { - ret = ff_thread_ref_frame(&dst->frames[i], &src->frames[i]); - if (ret < 0) - return ret; - } - } - - return 0; -} - -static const int8_t vlcdec_lookup[9][64] = { - { 0, }, - { -1, 1, }, - { -3, 3, -2, 2, }, - { -7, 7, -6, 6, -5, 5, -4, 4, }, - { -15, 15, -14, 14, -13, 13, -12, 12, - -11, 11, -10, 10, -9, 9, -8, 8, }, - { -31, 31, -30, 30, -29, 29, -28, 28, - -27, 27, -26, 26, -25, 25, -24, 24, - -23, 23, -22, 22, -21, 21, -20, 20, - -19, 19, -18, 18, -17, 17, -16, 16, }, - { -63, 63, -62, 62, -61, 61, -60, 60, - -59, 59, -58, 58, -57, 57, -56, 56, - -55, 55, -54, 54, -53, 53, -52, 52, - -51, 51, -50, 50, -49, 49, -48, 48, - -47, 47, -46, 46, -45, 45, -44, 44, - -43, 43, -42, 42, -41, 41, -40, 40, - -39, 39, -38, 38, -37, 37, -36, 36, - -35, 35, -34, 34, -33, 33, -32, 32, }, - { -127, 127, -126, 126, -125, 125, -124, 124, - -123, 123, -122, 122, -121, 121, -120, 120, - -119, 119, -118, 118, -117, 117, -116, 116, - -115, 115, -114, 114, -113, 113, -112, 112, - -111, 111, -110, 110, -109, 109, -108, 108, - -107, 107, -106, 106, -105, 105, -104, 104, - -103, 103, -102, 102, -101, 101, -100, 100, - -99, 99, -98, 98, -97, 97, -96, 96, }, - { -95, 95, -94, 94, -93, 93, -92, 92, - -91, 91, -90, 90, -89, 89, -88, 88, - -87, 87, -86, 86, -85, 85, -84, 84, - -83, 83, -82, 82, -81, 81, -80, 80, - -79, 79, -78, 78, -77, 77, -76, 76, - -75, 75, -74, 74, -73, 73, -72, 72, - -71, 71, -70, 70, -69, 69, -68, 68, - -67, 67, -66, 66, -65, 65, -64, 64, }, -}; - -static int vlc_decode_block(MimicContext *ctx, int num_coeffs, int qscale) -{ - int16_t *block = ctx->dct_block; - unsigned int pos; - - ctx->dsp.clear_block(block); - - block[0] = get_bits(&ctx->gb, 8) << 3; - - for (pos = 1; pos < num_coeffs; pos++) { - uint32_t vlc, num_bits; - int value; - int coeff; - - vlc = get_vlc2(&ctx->gb, ctx->vlc.table, ctx->vlc.bits, 3); - if (!vlc) /* end-of-block code */ - return 0; - if (vlc == -1) - return AVERROR_INVALIDDATA; - - /* pos_add and num_bits are coded in the vlc code */ - pos += vlc & 15; // pos_add - num_bits = vlc >> 4; // num_bits - - if (pos >= 64) - return AVERROR_INVALIDDATA; - - value = get_bits(&ctx->gb, num_bits); - - /* FFmpeg's IDCT behaves somewhat different from the original code, so - * a factor of 4 was added to the input */ - - coeff = vlcdec_lookup[num_bits][value]; - if (pos < 3) - coeff <<= 4; - else /* TODO Use >> 10 instead of / 1001 */ - coeff = (coeff * qscale) / 1001; - - block[ctx->scantable.permutated[pos]] = coeff; - } - - return 0; -} - -static int decode(MimicContext *ctx, int quality, int num_coeffs, - int is_iframe) -{ - int ret, y, x, plane, cur_row = 0; - - for (plane = 0; plane < 3; plane++) { - const int is_chroma = !!plane; - const int qscale = av_clip(10000 - quality, is_chroma ? 1000 : 2000, - 10000) << 2; - const int stride = ctx->flipped_ptrs[ctx->cur_index ].linesize[plane]; - const uint8_t *src = ctx->flipped_ptrs[ctx->prev_index].data[plane]; - uint8_t *dst = ctx->flipped_ptrs[ctx->cur_index ].data[plane]; - - for (y = 0; y < ctx->num_vblocks[plane]; y++) { - for (x = 0; x < ctx->num_hblocks[plane]; x++) { - /* Check for a change condition in the current block. - * - iframes always change. - * - Luma plane changes on get_bits1 == 0 - * - Chroma planes change on get_bits1 == 1 */ - if (is_iframe || get_bits1(&ctx->gb) == is_chroma) { - /* Luma planes may use a backreference from the 15 last - * frames preceding the previous. (get_bits1 == 1) - * Chroma planes don't use backreferences. */ - if (is_chroma || is_iframe || !get_bits1(&ctx->gb)) { - if ((ret = vlc_decode_block(ctx, num_coeffs, - qscale)) < 0) { - av_log(ctx->avctx, AV_LOG_ERROR, "Error decoding " - "block.\n"); - return ret; - } - ctx->dsp.idct_put(dst, stride, ctx->dct_block); - } else { - unsigned int backref = get_bits(&ctx->gb, 4); - int index = (ctx->cur_index + backref) & 15; - uint8_t *p = ctx->flipped_ptrs[index].data[0]; - - if (index != ctx->cur_index && p) { - ff_thread_await_progress(&ctx->frames[index], - cur_row, 0); - p += src - - ctx->flipped_ptrs[ctx->prev_index].data[plane]; - ctx->hdsp.put_pixels_tab[1][0](dst, p, stride, 8); - } else { - av_log(ctx->avctx, AV_LOG_ERROR, - "No such backreference! Buggy sample.\n"); - } - } - } else { - ff_thread_await_progress(&ctx->frames[ctx->prev_index], - cur_row, 0); - ctx->hdsp.put_pixels_tab[1][0](dst, src, stride, 8); - } - src += 8; - dst += 8; - } - src += (stride - ctx->num_hblocks[plane]) << 3; - dst += (stride - ctx->num_hblocks[plane]) << 3; - - ff_thread_report_progress(&ctx->frames[ctx->cur_index], - cur_row++, 0); - } - } - - return 0; -} - -/** - * Flip the buffer upside-down and put it in the YVU order to match the - * way Mimic encodes frames. - */ -static void prepare_avpic(MimicContext *ctx, AVPicture *dst, AVFrame *src) -{ - int i; - dst->data[0] = src->data[0] + ( ctx->avctx->height - 1) * src->linesize[0]; - dst->data[1] = src->data[2] + ((ctx->avctx->height >> 1) - 1) * src->linesize[2]; - dst->data[2] = src->data[1] + ((ctx->avctx->height >> 1) - 1) * src->linesize[1]; - for (i = 0; i < 3; i++) - dst->linesize[i] = -src->linesize[i]; -} - -static int mimic_decode_frame(AVCodecContext *avctx, void *data, - int *got_frame, AVPacket *avpkt) -{ - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - int swap_buf_size = buf_size - MIMIC_HEADER_SIZE; - MimicContext *ctx = avctx->priv_data; - GetByteContext gb; - int is_pframe; - int width, height; - int quality, num_coeffs; - int res; - - if (buf_size <= MIMIC_HEADER_SIZE) { - av_log(avctx, AV_LOG_ERROR, "insufficient data\n"); - return AVERROR_INVALIDDATA; - } - - bytestream2_init(&gb, buf, MIMIC_HEADER_SIZE); - bytestream2_skip(&gb, 2); /* some constant (always 256) */ - quality = bytestream2_get_le16u(&gb); - width = bytestream2_get_le16u(&gb); - height = bytestream2_get_le16u(&gb); - bytestream2_skip(&gb, 4); /* some constant */ - is_pframe = bytestream2_get_le32u(&gb); - num_coeffs = bytestream2_get_byteu(&gb); - bytestream2_skip(&gb, 3); /* some constant */ - - if (!ctx->avctx) { - int i; - - if (!(width == 160 && height == 120) && - !(width == 320 && height == 240)) { - av_log(avctx, AV_LOG_ERROR, "invalid width/height!\n"); - return AVERROR_INVALIDDATA; - } - - ctx->avctx = avctx; - avctx->width = width; - avctx->height = height; - avctx->pix_fmt = AV_PIX_FMT_YUV420P; - for (i = 0; i < 3; i++) { - ctx->num_vblocks[i] = FF_CEIL_RSHIFT(height, 3 + !!i); - ctx->num_hblocks[i] = width >> (3 + !!i); - } - } else if (width != ctx->avctx->width || height != ctx->avctx->height) { - avpriv_request_sample(avctx, "Resolution changing"); - return AVERROR_PATCHWELCOME; - } - - if (is_pframe && !ctx->frames[ctx->prev_index].f->data[0]) { - av_log(avctx, AV_LOG_ERROR, "decoding must start with keyframe\n"); - return AVERROR_INVALIDDATA; - } - - ff_thread_release_buffer(avctx, &ctx->frames[ctx->cur_index]); - ctx->frames[ctx->cur_index].f->pict_type = is_pframe ? AV_PICTURE_TYPE_P : - AV_PICTURE_TYPE_I; - if ((res = ff_thread_get_buffer(avctx, &ctx->frames[ctx->cur_index], - AV_GET_BUFFER_FLAG_REF)) < 0) - return res; - - ctx->next_prev_index = ctx->cur_index; - ctx->next_cur_index = (ctx->cur_index - 1) & 15; - - prepare_avpic(ctx, &ctx->flipped_ptrs[ctx->cur_index], - ctx->frames[ctx->cur_index].f); - - ff_thread_finish_setup(avctx); - - av_fast_padded_malloc(&ctx->swap_buf, &ctx->swap_buf_size, swap_buf_size); - if (!ctx->swap_buf) - return AVERROR(ENOMEM); - - ctx->dsp.bswap_buf(ctx->swap_buf, - (const uint32_t*) (buf + MIMIC_HEADER_SIZE), - swap_buf_size >> 2); - init_get_bits(&ctx->gb, ctx->swap_buf, swap_buf_size << 3); - - res = decode(ctx, quality, num_coeffs, !is_pframe); - ff_thread_report_progress(&ctx->frames[ctx->cur_index], INT_MAX, 0); - if (res < 0) { - if (!(avctx->active_thread_type & FF_THREAD_FRAME)) { - ff_thread_release_buffer(avctx, &ctx->frames[ctx->cur_index]); - return res; - } - } - - if ((res = av_frame_ref(data, ctx->frames[ctx->cur_index].f)) < 0) - return res; - *got_frame = 1; - - ctx->prev_index = ctx->next_prev_index; - ctx->cur_index = ctx->next_cur_index; - - /* Only release frames that aren't used for backreferences anymore */ - ff_thread_release_buffer(avctx, &ctx->frames[ctx->cur_index]); - - return buf_size; -} - -static av_cold int mimic_init_thread_copy(AVCodecContext *avctx) -{ - MimicContext *ctx = avctx->priv_data; - int i; - - for (i = 0; i < FF_ARRAY_ELEMS(ctx->frames); i++) { - ctx->frames[i].f = av_frame_alloc(); - if (!ctx->frames[i].f) { - mimic_decode_end(avctx); - return AVERROR(ENOMEM); - } - } - - return 0; -} - -AVCodec ff_mimic_decoder = { - .name = "mimic", - .long_name = NULL_IF_CONFIG_SMALL("Mimic"), - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_MIMIC, - .priv_data_size = sizeof(MimicContext), - .init = mimic_decode_init, - .close = mimic_decode_end, - .decode = mimic_decode_frame, - .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS, - .update_thread_context = ONLY_IF_THREADS_ENABLED(mimic_decode_update_thread_context), - .init_thread_copy = ONLY_IF_THREADS_ENABLED(mimic_init_thread_copy), -}; |