diff options
Diffstat (limited to 'libavcodec/qtrleenc.c')
-rw-r--r-- | libavcodec/qtrleenc.c | 56 |
1 files changed, 39 insertions, 17 deletions
diff --git a/libavcodec/qtrleenc.c b/libavcodec/qtrleenc.c index ede03d2..0e10c76 100644 --- a/libavcodec/qtrleenc.c +++ b/libavcodec/qtrleenc.c @@ -5,20 +5,20 @@ * * This file is based on flashsvenc.c. * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -39,6 +39,7 @@ typedef struct QtrleEncContext { int pixel_size; AVPicture previous_frame; unsigned int max_buf_size; + int logical_width; /** * This array will contain at ith position the value of the best RLE code * if the line started at pixel i @@ -67,8 +68,13 @@ static av_cold int qtrle_encode_init(AVCodecContext *avctx) return -1; } s->avctx=avctx; + s->logical_width=avctx->width; switch (avctx->pix_fmt) { + case PIX_FMT_GRAY8: + s->logical_width = avctx->width / 4; + s->pixel_size = 4; + break; case PIX_FMT_RGB555BE: s->pixel_size = 2; break; @@ -82,11 +88,11 @@ static av_cold int qtrle_encode_init(AVCodecContext *avctx) av_log(avctx, AV_LOG_ERROR, "Unsupported colorspace.\n"); break; } - avctx->bits_per_coded_sample = s->pixel_size*8; + avctx->bits_per_coded_sample = avctx->pix_fmt == PIX_FMT_GRAY8 ? 40 : s->pixel_size*8; - s->rlecode_table = av_mallocz(s->avctx->width); - s->skip_table = av_mallocz(s->avctx->width); - s->length_table = av_mallocz((s->avctx->width + 1)*sizeof(int)); + s->rlecode_table = av_mallocz(s->logical_width); + s->skip_table = av_mallocz(s->logical_width); + s->length_table = av_mallocz((s->logical_width + 1)*sizeof(int)); if (!s->skip_table || !s->length_table || !s->rlecode_table) { av_log(avctx, AV_LOG_ERROR, "Error allocating memory.\n"); return -1; @@ -96,10 +102,10 @@ static av_cold int qtrle_encode_init(AVCodecContext *avctx) return -1; } - s->max_buf_size = s->avctx->width*s->avctx->height*s->pixel_size /* image base material */ - + 15 /* header + footer */ - + s->avctx->height*2 /* skip code+rle end */ - + s->avctx->width/MAX_RLE_BULK + 1 /* rle codes */; + s->max_buf_size = s->logical_width*s->avctx->height*s->pixel_size /* image base material */ + + 15 /* header + footer */ + + s->avctx->height*2 /* skip code+rle end */ + + s->logical_width/MAX_RLE_BULK + 1 /* rle codes */; avctx->coded_frame = &s->frame; return 0; } @@ -109,7 +115,7 @@ static av_cold int qtrle_encode_init(AVCodecContext *avctx) */ static void qtrle_encode_line(QtrleEncContext *s, AVFrame *p, int line, uint8_t **buf) { - int width=s->avctx->width; + int width=s->logical_width; int i; signed char rlecode; @@ -224,12 +230,28 @@ static void qtrle_encode_line(QtrleEncContext *s, AVFrame *p, int line, uint8_t } else if (rlecode > 0) { /* bulk copy */ - bytestream_put_buffer(buf, this_line + i*s->pixel_size, rlecode*s->pixel_size); + if (s->avctx->pix_fmt == PIX_FMT_GRAY8) { + int j; + // QT grayscale colorspace has 0=white and 255=black, we will + // ignore the palette that is included in the AVFrame because + // PIX_FMT_GRAY8 has defined color mapping + for (j = 0; j < rlecode*s->pixel_size; ++j) + bytestream_put_byte(buf, *(this_line + i*s->pixel_size + j) ^ 0xff); + } else { + bytestream_put_buffer(buf, this_line + i*s->pixel_size, rlecode*s->pixel_size); + } i += rlecode; } else { /* repeat the bits */ - bytestream_put_buffer(buf, this_line + i*s->pixel_size, s->pixel_size); + if (s->avctx->pix_fmt == PIX_FMT_GRAY8) { + int j; + // QT grayscale colorspace has 0=white and 255=black, ... + for (j = 0; j < s->pixel_size; ++j) + bytestream_put_byte(buf, *(this_line + i*s->pixel_size + j) ^ 0xff); + } else { + bytestream_put_buffer(buf, this_line + i*s->pixel_size, s->pixel_size); + } i -= rlecode; } } @@ -245,7 +267,7 @@ static int encode_frame(QtrleEncContext *s, AVFrame *p, uint8_t *buf) uint8_t *orig_buf = buf; if (!s->frame.key_frame) { - unsigned line_size = s->avctx->width * s->pixel_size; + unsigned line_size = s->logical_width * s->pixel_size; for (start_line = 0; start_line < s->avctx->height; start_line++) if (memcmp(p->data[0] + start_line*p->linesize[0], s->previous_frame.data[0] + start_line*s->previous_frame.linesize[0], @@ -329,6 +351,6 @@ AVCodec ff_qtrle_encoder = { .init = qtrle_encode_init, .encode = qtrle_encode_frame, .close = qtrle_encode_end, - .pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB555BE, PIX_FMT_ARGB, PIX_FMT_NONE}, + .pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB555BE, PIX_FMT_ARGB, PIX_FMT_GRAY8, PIX_FMT_NONE}, .long_name = NULL_IF_CONFIG_SMALL("QuickTime Animation (RLE) video"), }; |