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Diffstat (limited to 'ffmpeg/libavcodec/pnmenc.c')
| -rw-r--r-- | ffmpeg/libavcodec/pnmenc.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/ffmpeg/libavcodec/pnmenc.c b/ffmpeg/libavcodec/pnmenc.c new file mode 100644 index 0000000..8cd96be --- /dev/null +++ b/ffmpeg/libavcodec/pnmenc.c @@ -0,0 +1,186 @@ +/* + * PNM image format + * Copyright (c) 2002, 2003 Fabrice Bellard + * + * 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 "libavutil/pixdesc.h" +#include "avcodec.h" +#include "internal.h" +#include "pnm.h" + + +static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt, + const AVFrame *pict, int *got_packet) +{ + PNMContext *s = avctx->priv_data; + AVFrame * const p = &s->picture; + int i, h, h1, c, n, linesize, ret; + uint8_t *ptr, *ptr1, *ptr2; + + if ((ret = ff_alloc_packet2(avctx, pkt, avpicture_get_size(avctx->pix_fmt, + avctx->width, + avctx->height) + 200)) < 0) + return ret; + + *p = *pict; + p->pict_type = AV_PICTURE_TYPE_I; + p->key_frame = 1; + + s->bytestream_start = + s->bytestream = pkt->data; + s->bytestream_end = pkt->data + pkt->size; + + h = avctx->height; + h1 = h; + switch (avctx->pix_fmt) { + case AV_PIX_FMT_MONOWHITE: + c = '4'; + n = (avctx->width + 7) >> 3; + break; + case AV_PIX_FMT_GRAY8: + c = '5'; + n = avctx->width; + break; + case AV_PIX_FMT_GRAY16BE: + c = '5'; + n = avctx->width * 2; + break; + case AV_PIX_FMT_RGB24: + c = '6'; + n = avctx->width * 3; + break; + case AV_PIX_FMT_RGB48BE: + c = '6'; + n = avctx->width * 6; + break; + case AV_PIX_FMT_YUV420P: + if (avctx->width & 1 || avctx->height & 1) { + av_log(avctx, AV_LOG_ERROR, "pgmyuv needs even width and height\n"); + return AVERROR(EINVAL); + } + c = '5'; + n = avctx->width; + h1 = (h * 3) / 2; + break; + case AV_PIX_FMT_YUV420P16BE: + c = '5'; + n = avctx->width * 2; + h1 = (h * 3) / 2; + break; + default: + return -1; + } + snprintf(s->bytestream, s->bytestream_end - s->bytestream, + "P%c\n%d %d\n", c, avctx->width, h1); + s->bytestream += strlen(s->bytestream); + if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE) { + int maxdepth = (1 << (av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth_minus1 + 1)) - 1; + snprintf(s->bytestream, s->bytestream_end - s->bytestream, + "%d\n", maxdepth); + s->bytestream += strlen(s->bytestream); + } + + ptr = p->data[0]; + linesize = p->linesize[0]; + for (i = 0; i < h; i++) { + memcpy(s->bytestream, ptr, n); + s->bytestream += n; + ptr += linesize; + } + + if (avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV420P16BE) { + h >>= 1; + n >>= 1; + ptr1 = p->data[1]; + ptr2 = p->data[2]; + for (i = 0; i < h; i++) { + memcpy(s->bytestream, ptr1, n); + s->bytestream += n; + memcpy(s->bytestream, ptr2, n); + s->bytestream += n; + ptr1 += p->linesize[1]; + ptr2 += p->linesize[2]; + } + } + pkt->size = s->bytestream - s->bytestream_start; + pkt->flags |= AV_PKT_FLAG_KEY; + *got_packet = 1; + + return 0; +} + + +#if CONFIG_PGM_ENCODER +AVCodec ff_pgm_encoder = { + .name = "pgm", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_PGM, + .priv_data_size = sizeof(PNMContext), + .init = ff_pnm_init, + .encode2 = pnm_encode_frame, + .pix_fmts = (const enum AVPixelFormat[]){ + AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE + }, + .long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"), +}; +#endif + +#if CONFIG_PGMYUV_ENCODER +AVCodec ff_pgmyuv_encoder = { + .name = "pgmyuv", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_PGMYUV, + .priv_data_size = sizeof(PNMContext), + .init = ff_pnm_init, + .encode2 = pnm_encode_frame, + .pix_fmts = (const enum AVPixelFormat[]){ + AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_NONE + }, + .long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"), +}; +#endif + +#if CONFIG_PPM_ENCODER +AVCodec ff_ppm_encoder = { + .name = "ppm", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_PPM, + .priv_data_size = sizeof(PNMContext), + .init = ff_pnm_init, + .encode2 = pnm_encode_frame, + .pix_fmts = (const enum AVPixelFormat[]){ + AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_NONE + }, + .long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"), +}; +#endif + +#if CONFIG_PBM_ENCODER +AVCodec ff_pbm_encoder = { + .name = "pbm", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_PBM, + .priv_data_size = sizeof(PNMContext), + .init = ff_pnm_init, + .encode2 = pnm_encode_frame, + .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_MONOWHITE, + AV_PIX_FMT_NONE }, + .long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"), +}; +#endif |