diff options
author | Michael Niedermayer <michaelni@gmx.at> | 2013-05-18 16:27:07 +0400 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2013-05-18 16:31:01 +0400 |
commit | ed0aed09e8a19d255963c21c7aeda18cee3d9422 (patch) | |
tree | 59457517f96fdcd372f73da491372314a3d158d6 /libavcodec/escape130.c | |
parent | 849bb62c2c9afdb1e81f44870645a6990c4ce1fc (diff) | |
parent | 350914fc8024612f614c0a4f5c8ba5da2d9988e7 (diff) |
Merge remote-tracking branch 'qatar/master'
* qatar/master:
Escape 130 (RPL) decoder
Conflicts:
libavcodec/Makefile
libavcodec/allcodecs.c
libavcodec/codec_desc.c
libavcodec/escape130.c
libavcodec/version.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/escape130.c')
-rw-r--r-- | libavcodec/escape130.c | 408 |
1 files changed, 224 insertions, 184 deletions
diff --git a/libavcodec/escape130.c b/libavcodec/escape130.c index d24af79cbe..003cd1be51 100644 --- a/libavcodec/escape130.c +++ b/libavcodec/escape130.c @@ -1,5 +1,5 @@ /* - * Escape 130 Video Decoder + * Escape 130 video decoder * Copyright (C) 2008 Eli Friedman (eli.friedman <at> gmail.com) * * This file is part of FFmpeg. @@ -19,35 +19,134 @@ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ +#include "libavutil/attributes.h" +#include "libavutil/mem.h" #include "avcodec.h" - #define BITSTREAM_READER_LE #include "get_bits.h" #include "internal.h" - typedef struct Escape130Context { - AVFrame frame; - uint8_t *bases; + uint8_t *old_y_avg; + + uint8_t *new_y, *old_y; + uint8_t *new_u, *old_u; + uint8_t *new_v, *old_v; + + uint8_t *buf1, *buf2; + int linesize[3]; } Escape130Context; -/** - * Initialize the decoder - * @param avctx decoder context - * @return 0 success, negative on error - */ +static const uint8_t offset_table[] = { 2, 4, 10, 20 }; +static const int8_t sign_table[64][4] = { + { 0, 0, 0, 0 }, + { -1, 1, 0, 0 }, + { 1, -1, 0, 0 }, + { -1, 0, 1, 0 }, + { -1, 1, 1, 0 }, + { 0, -1, 1, 0 }, + { 1, -1, 1, 0 }, + { -1, -1, 1, 0 }, + { 1, 0, -1, 0 }, + { 0, 1, -1, 0 }, + { 1, 1, -1, 0 }, + { -1, 1, -1, 0 }, + { 1, -1, -1, 0 }, + { -1, 0, 0, 1 }, + { -1, 1, 0, 1 }, + { 0, -1, 0, 1 }, + + { 0, 0, 0, 0 }, + { 1, -1, 0, 1 }, + { -1, -1, 0, 1 }, + { -1, 0, 1, 1 }, + { -1, 1, 1, 1 }, + { 0, -1, 1, 1 }, + { 1, -1, 1, 1 }, + { -1, -1, 1, 1 }, + { 0, 0, -1, 1 }, + { 1, 0, -1, 1 }, + { -1, 0, -1, 1 }, + { 0, 1, -1, 1 }, + { 1, 1, -1, 1 }, + { -1, 1, -1, 1 }, + { 0, -1, -1, 1 }, + { 1, -1, -1, 1 }, + + { 0, 0, 0, 0 }, + { -1, -1, -1, 1 }, + { 1, 0, 0, -1 }, + { 0, 1, 0, -1 }, + { 1, 1, 0, -1 }, + { -1, 1, 0, -1 }, + { 1, -1, 0, -1 }, + { 0, 0, 1, -1 }, + { 1, 0, 1, -1 }, + { -1, 0, 1, -1 }, + { 0, 1, 1, -1 }, + { 1, 1, 1, -1 }, + { -1, 1, 1, -1 }, + { 0, -1, 1, -1 }, + { 1, -1, 1, -1 }, + { -1, -1, 1, -1 }, + + { 0, 0, 0, 0 }, + { 1, 0, -1, -1 }, + { 0, 1, -1, -1 }, + { 1, 1, -1, -1 }, + { -1, 1, -1, -1 }, + { 1, -1, -1, -1 } +}; + +static const int8_t luma_adjust[] = { -4, -3, -2, -1, 1, 2, 3, 4 }; + +static const int8_t chroma_adjust[2][8] = { + { 1, 1, 0, -1, -1, -1, 0, 1 }, + { 0, 1, 1, 1, 0, -1, -1, -1 } +}; + +const uint8_t chroma_vals[] = { + 20, 28, 36, 44, 52, 60, 68, 76, + 84, 92, 100, 106, 112, 116, 120, 124, + 128, 132, 136, 140, 144, 150, 156, 164, + 172, 180, 188, 196, 204, 212, 220, 228 +}; + static av_cold int escape130_decode_init(AVCodecContext *avctx) { Escape130Context *s = avctx->priv_data; avctx->pix_fmt = AV_PIX_FMT_YUV420P; - avcodec_get_frame_defaults(&s->frame); - if((avctx->width&1) || (avctx->height&1)){ - av_log(avctx, AV_LOG_ERROR, "Dimensions are not a multiple of the block size\n"); - return AVERROR(EINVAL); + if ((avctx->width & 1) || (avctx->height & 1)) { + av_log(avctx, AV_LOG_ERROR, + "Dimensions should be a multiple of two.\n"); + return AVERROR_INVALIDDATA; + } + + s->old_y_avg = av_malloc(avctx->width * avctx->height / 4); + s->buf1 = av_malloc(avctx->width * avctx->height * 3 / 2); + s->buf2 = av_malloc(avctx->width * avctx->height * 3 / 2); + if (!s->old_y_avg || !s->buf1 || !s->buf2) { + av_freep(&s->old_y_avg); + av_freep(&s->buf1); + av_freep(&s->buf2); + av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n"); + return AVERROR(ENOMEM); } - s->bases= av_malloc(avctx->width * avctx->height /4); + s->linesize[0] = avctx->width; + s->linesize[1] = + s->linesize[2] = avctx->width / 2; + + s->new_y = s->buf1; + s->new_u = s->new_y + avctx->width * avctx->height; + s->new_v = s->new_u + avctx->width * avctx->height / 4; + s->old_y = s->buf2; + s->old_u = s->old_y + avctx->width * avctx->height; + s->old_v = s->old_u + avctx->width * avctx->height / 4; + memset(s->old_y, 0, avctx->width * avctx->height); + memset(s->old_u, 0x10, avctx->width * avctx->height / 4); + memset(s->old_v, 0x10, avctx->width * avctx->height / 4); return 0; } @@ -56,17 +155,17 @@ static av_cold int escape130_decode_close(AVCodecContext *avctx) { Escape130Context *s = avctx->priv_data; - av_frame_unref(&s->frame); - - av_freep(&s->bases); + av_freep(&s->old_y_avg); + av_freep(&s->buf1); + av_freep(&s->buf2); return 0; } -static unsigned decode_skip_count(GetBitContext* gb) { - unsigned value; - // This function reads a maximum of 27 bits, - // which is within the padding space +static int decode_skip_count(GetBitContext* gb) +{ + int value; + if (get_bits_left(gb) < 1+3) return -1; @@ -89,165 +188,87 @@ static unsigned decode_skip_count(GetBitContext* gb) { return -1; } -/** - * Decode a single frame - * @param avctx decoder context - * @param data decoded frame - * @param got_frame have decoded frame - * @param buf input buffer - * @param buf_size input buffer size - * @return 0 success, -1 on error - */ -static int escape130_decode_frame(AVCodecContext *avctx, - void *data, int *got_frame, - AVPacket *avpkt) +static int escape130_decode_frame(AVCodecContext *avctx, void *data, + int *got_frame, AVPacket *avpkt) { - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; Escape130Context *s = avctx->priv_data; - + AVFrame *pic = data; GetBitContext gb; - unsigned i; int ret; uint8_t *old_y, *old_cb, *old_cr, *new_y, *new_cb, *new_cr; + uint8_t *dstY, *dstU, *dstV; unsigned old_y_stride, old_cb_stride, old_cr_stride, new_y_stride, new_cb_stride, new_cr_stride; unsigned total_blocks = avctx->width * avctx->height / 4, - block_index, row_index = 0; - unsigned y[4] = {0}, cb = 16, cr = 16; - unsigned skip = -1; - unsigned y_base = 0; - uint8_t *yb= s->bases; - - AVFrame *frame = data; - - init_get_bits(&gb, buf, buf_size * 8); - - if (get_bits_left(&gb) < 128) - return -1; - - // Header; no useful information in here - skip_bits_long(&gb, 128); + block_index, block_x = 0; + unsigned y[4] = { 0 }, cb = 0x10, cr = 0x10; + int skip = -1, y_avg = 0, i, j; + uint8_t *ya = s->old_y_avg; + + // first 16 bytes are header; no useful information in here + if (buf_size <= 16) { + av_log(avctx, AV_LOG_ERROR, "Insufficient frame data\n"); + return AVERROR_INVALIDDATA; + } - if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0) + if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) return ret; - new_y = frame->data[0]; - new_cb = frame->data[1]; - new_cr = frame->data[2]; - new_y_stride = frame->linesize[0]; - new_cb_stride = frame->linesize[1]; - new_cr_stride = frame->linesize[2]; - old_y = s->frame.data[0]; - old_cb = s->frame.data[1]; - old_cr = s->frame.data[2]; - old_y_stride = s->frame.linesize[0]; - old_cb_stride = s->frame.linesize[1]; - old_cr_stride = s->frame.linesize[2]; - - av_log(avctx, AV_LOG_DEBUG, - "Strides: %i, %i\n", - new_y_stride, new_cb_stride); + init_get_bits(&gb, buf + 16, (buf_size - 16) * 8); + + new_y = s->new_y; + new_cb = s->new_u; + new_cr = s->new_v; + new_y_stride = s->linesize[0]; + new_cb_stride = s->linesize[1]; + new_cr_stride = s->linesize[2]; + old_y = s->old_y; + old_cb = s->old_u; + old_cr = s->old_v; + old_y_stride = s->linesize[0]; + old_cb_stride = s->linesize[1]; + old_cr_stride = s->linesize[2]; for (block_index = 0; block_index < total_blocks; block_index++) { // Note that this call will make us skip the rest of the blocks - // if the frame prematurely ends + // if the frame ends prematurely. if (skip == -1) skip = decode_skip_count(&gb); + if (skip == -1) { + av_log(avctx, AV_LOG_ERROR, "Error decoding skip value\n"); + return AVERROR_INVALIDDATA; + } if (skip) { - if (old_y) { - y[0] = old_y[0] / 4; - y[1] = old_y[1] / 4; - y[2] = old_y[old_y_stride] / 4; - y[3] = old_y[old_y_stride+1] / 4; - y_base= yb[0]; - cb = old_cb[0] / 8; - cr = old_cr[0] / 8; - } else { - y_base=y[0] = y[1] = y[2] = y[3] = 0; - cb = cr = 16; - } + y[0] = old_y[0]; + y[1] = old_y[1]; + y[2] = old_y[old_y_stride]; + y[3] = old_y[old_y_stride + 1]; + y_avg = ya[0]; + cb = old_cb[0]; + cr = old_cr[0]; } else { if (get_bits1(&gb)) { - static const uint8_t offset_table[] = {2, 4, 10, 20}; - static const int8_t sign_table[64][4] = - { {0, 0, 0, 0}, - {-1, 1, 0, 0}, - {1, -1, 0, 0}, - {-1, 0, 1, 0}, - {-1, 1, 1, 0}, - {0, -1, 1, 0}, - {1, -1, 1, 0}, - {-1, -1, 1, 0}, - {1, 0, -1, 0}, - {0, 1, -1, 0}, - {1, 1, -1, 0}, - {-1, 1, -1, 0}, - {1, -1, -1, 0}, - {-1, 0, 0, 1}, - {-1, 1, 0, 1}, - {0, -1, 0, 1}, - - {0, 0, 0, 0}, - {1, -1, 0, 1}, - {-1, -1, 0, 1}, - {-1, 0, 1, 1}, - {-1, 1, 1, 1}, - {0, -1, 1, 1}, - {1, -1, 1, 1}, - {-1, -1, 1, 1}, - {0, 0, -1, 1}, - {1, 0, -1, 1}, - {-1, 0, -1, 1}, - {0, 1, -1, 1}, - {1, 1, -1, 1}, - {-1, 1, -1, 1}, - {0, -1, -1, 1}, - {1, -1, -1, 1}, - - {0, 0, 0, 0}, - {-1, -1, -1, 1}, - {1, 0, 0, -1}, - {0, 1, 0, -1}, - {1, 1, 0, -1}, - {-1, 1, 0, -1}, - {1, -1, 0, -1}, - {0, 0, 1, -1}, - {1, 0, 1, -1}, - {-1, 0, 1, -1}, - {0, 1, 1, -1}, - {1, 1, 1, -1}, - {-1, 1, 1, -1}, - {0, -1, 1, -1}, - {1, -1, 1, -1}, - {-1, -1, 1, -1}, - - {0, 0, 0, 0}, - {1, 0, -1, -1}, - {0, 1, -1, -1}, - {1, 1, -1, -1}, - {-1, 1, -1, -1}, - {1, -1, -1, -1} }; - unsigned sign_selector = get_bits(&gb, 6); + unsigned sign_selector = get_bits(&gb, 6); unsigned difference_selector = get_bits(&gb, 2); - y_base = 2 * get_bits(&gb, 5); + y_avg = 2 * get_bits(&gb, 5); for (i = 0; i < 4; i++) { - y[i] = av_clip((int)y_base + offset_table[difference_selector] * - sign_table[sign_selector][i], 0, 63); + y[i] = av_clip(y_avg + offset_table[difference_selector] * + sign_table[sign_selector][i], 0, 63); } } else if (get_bits1(&gb)) { if (get_bits1(&gb)) { - y_base = get_bits(&gb, 6); + y_avg = get_bits(&gb, 6); } else { unsigned adjust_index = get_bits(&gb, 3); - static const int8_t adjust[] = {-4, -3, -2, -1, 1, 2, 3, 4}; - y_base = (y_base + adjust[adjust_index]) & 63; + y_avg = (y_avg + luma_adjust[adjust_index]) & 63; } for (i = 0; i < 4; i++) - y[i] = y_base; + y[i] = y_avg; } if (get_bits1(&gb)) { @@ -256,56 +277,75 @@ static int escape130_decode_frame(AVCodecContext *avctx, cr = get_bits(&gb, 5); } else { unsigned adjust_index = get_bits(&gb, 3); - static const int8_t adjust[2][8] = - { { 1, 1, 0, -1, -1, -1, 0, 1 }, - { 0, 1, 1, 1, 0, -1, -1, -1 } }; - cb = (cb + adjust[0][adjust_index]) & 31; - cr = (cr + adjust[1][adjust_index]) & 31; + cb = (cb + chroma_adjust[0][adjust_index]) & 31; + cr = (cr + chroma_adjust[1][adjust_index]) & 31; } } } - *yb++= y_base; - - new_y[0] = y[0] * 4; - new_y[1] = y[1] * 4; - new_y[new_y_stride] = y[2] * 4; - new_y[new_y_stride + 1] = y[3] * 4; - *new_cb = cb * 8; - *new_cr = cr * 8; - - if (old_y) - old_y += 2, old_cb++, old_cr++; - new_y += 2, new_cb++, new_cr++; - row_index++; - if (avctx->width / 2 == row_index) { - row_index = 0; - if (old_y) { - old_y += old_y_stride * 2 - avctx->width; - old_cb += old_cb_stride - avctx->width / 2; - old_cr += old_cr_stride - avctx->width / 2; - } + *ya++ = y_avg; + + new_y[0] = y[0]; + new_y[1] = y[1]; + new_y[new_y_stride] = y[2]; + new_y[new_y_stride + 1] = y[3]; + *new_cb = cb; + *new_cr = cr; + + old_y += 2; + old_cb++; + old_cr++; + new_y += 2; + new_cb++; + new_cr++; + block_x++; + if (block_x * 2 == avctx->width) { + block_x = 0; + old_y += old_y_stride * 2 - avctx->width; + old_cb += old_cb_stride - avctx->width / 2; + old_cr += old_cr_stride - avctx->width / 2; new_y += new_y_stride * 2 - avctx->width; - new_cb += new_cb_stride - avctx->width / 2; - new_cr += new_cr_stride - avctx->width / 2; + new_cb += new_cb_stride - avctx->width / 2; + new_cr += new_cr_stride - avctx->width / 2; } skip--; } - av_log(avctx, AV_LOG_DEBUG, - "Escape sizes: %i, %i\n", - buf_size, get_bits_count(&gb) / 8); + new_y = s->new_y; + new_cb = s->new_u; + new_cr = s->new_v; + dstY = pic->data[0]; + dstU = pic->data[1]; + dstV = pic->data[2]; + for (j = 0; j < avctx->height; j++) { + for (i = 0; i < avctx->width; i++) + dstY[i] = new_y[i] << 2; + dstY += pic->linesize[0]; + new_y += new_y_stride; + } + for (j = 0; j < avctx->height / 2; j++) { + for (i = 0; i < avctx->width / 2; i++) { + dstU[i] = chroma_vals[new_cb[i]]; + dstV[i] = chroma_vals[new_cr[i]]; + } + dstU += pic->linesize[1]; + dstV += pic->linesize[2]; + new_cb += new_cb_stride; + new_cr += new_cr_stride; + } + + av_dlog(avctx, "Frame data: provided %d bytes, used %d bytes\n", + buf_size, get_bits_count(&gb) >> 3); - av_frame_unref(&s->frame); - if ((ret = av_frame_ref(&s->frame, frame)) < 0) - return ret; + FFSWAP(uint8_t*, s->old_y, s->new_y); + FFSWAP(uint8_t*, s->old_u, s->new_u); + FFSWAP(uint8_t*, s->old_v, s->new_v); *got_frame = 1; return buf_size; } - AVCodec ff_escape130_decoder = { .name = "escape130", .type = AVMEDIA_TYPE_VIDEO, |