981c4caed3
For all p*m encoders a very sharp upper bound for the size of the output packets is available before the packet is allocated. This can be used to avoid an intermediate buffer when encoding by using ff_get_encode_buffer() instead of ff_alloc_packet2() (without min_size); this also adds support for user-supplied buffers. Reviewed-by: James Almer <jamrial@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
224 lines
7.2 KiB
C
224 lines
7.2 KiB
C
/*
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* PNM image format
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* Copyright (c) 2002, 2003 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/intreadwrite.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/pixdesc.h"
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#include "avcodec.h"
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#include "encode.h"
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#include "internal.h"
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static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *p, int *got_packet)
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{
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uint8_t *bytestream, *bytestream_start, *bytestream_end;
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int i, h, h1, c, n, linesize, ret;
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uint8_t *ptr, *ptr1, *ptr2;
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int size = av_image_get_buffer_size(avctx->pix_fmt,
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avctx->width, avctx->height, 1);
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if ((ret = ff_get_encode_buffer(avctx, pkt, size + 200, 0)) < 0)
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return ret;
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bytestream_start =
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bytestream = pkt->data;
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bytestream_end = pkt->data + pkt->size;
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h = avctx->height;
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h1 = h;
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switch (avctx->pix_fmt) {
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case AV_PIX_FMT_MONOWHITE:
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c = '4';
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n = (avctx->width + 7) >> 3;
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break;
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case AV_PIX_FMT_GRAY8:
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c = '5';
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n = avctx->width;
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break;
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case AV_PIX_FMT_GRAY16BE:
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c = '5';
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n = avctx->width * 2;
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break;
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case AV_PIX_FMT_RGB24:
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c = '6';
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n = avctx->width * 3;
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break;
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case AV_PIX_FMT_RGB48BE:
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c = '6';
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n = avctx->width * 6;
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break;
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case AV_PIX_FMT_YUV420P:
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if (avctx->width & 1 || avctx->height & 1) {
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av_log(avctx, AV_LOG_ERROR, "pgmyuv needs even width and height\n");
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return AVERROR(EINVAL);
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}
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c = '5';
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n = avctx->width;
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h1 = (h * 3) / 2;
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break;
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case AV_PIX_FMT_YUV420P16BE:
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c = '5';
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n = avctx->width * 2;
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h1 = (h * 3) / 2;
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break;
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case AV_PIX_FMT_GBRPF32:
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c = 'F';
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n = avctx->width * 4;
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break;
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default:
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return -1;
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}
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snprintf(bytestream, bytestream_end - bytestream,
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"P%c\n%d %d\n", c, avctx->width, h1);
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bytestream += strlen(bytestream);
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if (avctx->pix_fmt == AV_PIX_FMT_GBRPF32)
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snprintf(bytestream, bytestream_end - bytestream,
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"%f\n", avctx->pix_fmt == AV_PIX_FMT_GBRPF32BE ? 1.f: -1.f);
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bytestream += strlen(bytestream);
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if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE &&
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avctx->pix_fmt != AV_PIX_FMT_GBRPF32) {
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int maxdepth = (1 << av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth) - 1;
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snprintf(bytestream, bytestream_end - bytestream,
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"%d\n", maxdepth);
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bytestream += strlen(bytestream);
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}
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if (avctx->pix_fmt == AV_PIX_FMT_GBRPF32) {
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float *r = (float *)p->data[2];
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float *g = (float *)p->data[0];
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float *b = (float *)p->data[1];
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for (int i = 0; i < avctx->height; i++) {
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for (int j = 0; j < avctx->width; j++) {
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AV_WN32(bytestream + 0, av_float2int(r[j]));
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AV_WN32(bytestream + 4, av_float2int(g[j]));
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AV_WN32(bytestream + 8, av_float2int(b[j]));
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bytestream += 12;
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}
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r += p->linesize[2] / 4;
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g += p->linesize[0] / 4;
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b += p->linesize[1] / 4;
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}
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} else {
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ptr = p->data[0];
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linesize = p->linesize[0];
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for (i = 0; i < h; i++) {
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memcpy(bytestream, ptr, n);
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bytestream += n;
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ptr += linesize;
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}
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}
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if (avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV420P16BE) {
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h >>= 1;
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n >>= 1;
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ptr1 = p->data[1];
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ptr2 = p->data[2];
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for (i = 0; i < h; i++) {
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memcpy(bytestream, ptr1, n);
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bytestream += n;
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memcpy(bytestream, ptr2, n);
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bytestream += n;
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ptr1 += p->linesize[1];
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ptr2 += p->linesize[2];
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}
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}
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pkt->flags |= AV_PKT_FLAG_KEY;
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av_shrink_packet(pkt, bytestream - bytestream_start);
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*got_packet = 1;
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return 0;
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}
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#if CONFIG_PGM_ENCODER
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const AVCodec ff_pgm_encoder = {
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.name = "pgm",
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.long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_PGM,
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.capabilities = AV_CODEC_CAP_DR1,
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.encode2 = pnm_encode_frame,
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.pix_fmts = (const enum AVPixelFormat[]){
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE
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},
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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#if CONFIG_PGMYUV_ENCODER
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const AVCodec ff_pgmyuv_encoder = {
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.name = "pgmyuv",
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.long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_PGMYUV,
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.capabilities = AV_CODEC_CAP_DR1,
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.encode2 = pnm_encode_frame,
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.pix_fmts = (const enum AVPixelFormat[]){
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_NONE
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},
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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#if CONFIG_PPM_ENCODER
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const AVCodec ff_ppm_encoder = {
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.name = "ppm",
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.long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_PPM,
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.capabilities = AV_CODEC_CAP_DR1,
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.encode2 = pnm_encode_frame,
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.pix_fmts = (const enum AVPixelFormat[]){
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AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_NONE
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},
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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#if CONFIG_PBM_ENCODER
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const AVCodec ff_pbm_encoder = {
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.name = "pbm",
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.long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_PBM,
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.capabilities = AV_CODEC_CAP_DR1,
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.encode2 = pnm_encode_frame,
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.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_MONOWHITE,
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AV_PIX_FMT_NONE },
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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#if CONFIG_PFM_ENCODER
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const AVCodec ff_pfm_encoder = {
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.name = "pfm",
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.long_name = NULL_IF_CONFIG_SMALL("PFM (Portable FloatMap) image"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_PFM,
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.capabilities = AV_CODEC_CAP_DR1,
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.encode2 = pnm_encode_frame,
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.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_GBRPF32,
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AV_PIX_FMT_NONE },
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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