1
0
mirror of https://github.com/mpv-player/mpv synced 2024-12-22 23:02:37 +00:00
mpv/video/image_writer.c
wm4 aa0157d9b8 image_writer: don't use jpeg baseline, and remove useless jpeg options
The jpeg-optimize and jpeg-baseline options were undocumented, and
they're also pretty useless. There's no reason to ever change them.

Also, don't write jpeg baseline images. This just makes compression
worse for the sake of rather questionable compatibility with ancient
decoders.
2015-08-02 01:10:18 +02:00

355 lines
10 KiB
C

/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpv 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <setjmp.h>
#include <libavcodec/avcodec.h>
#include <libavutil/mem.h>
#include "config.h"
#if HAVE_JPEG
#include <jpeglib.h>
#endif
#include "osdep/io.h"
#include "image_writer.h"
#include "talloc.h"
#include "video/img_format.h"
#include "video/mp_image.h"
#include "video/fmt-conversion.h"
#include "video/sws_utils.h"
#include "options/m_option.h"
const struct image_writer_opts image_writer_opts_defaults = {
.format = "jpg",
.high_bit_depth = 1,
.png_compression = 7,
.png_filter = 5,
.jpeg_quality = 90,
.jpeg_smooth = 0,
.jpeg_source_chroma = 1,
.tag_csp = 0,
};
#define OPT_BASE_STRUCT struct image_writer_opts
const struct m_sub_options image_writer_conf = {
.opts = (const m_option_t[]) {
OPT_INTRANGE("jpeg-quality", jpeg_quality, 0, 0, 100),
OPT_INTRANGE("jpeg-smooth", jpeg_smooth, 0, 0, 100),
OPT_FLAG("jpeg-source-chroma", jpeg_source_chroma, 0),
OPT_INTRANGE("png-compression", png_compression, 0, 0, 9),
OPT_INTRANGE("png-filter", png_filter, 0, 0, 5),
OPT_STRING("format", format, 0),
OPT_FLAG("high-bit-depth", high_bit_depth, 0),
OPT_FLAG("tag-colorspace", tag_csp, 0),
{0},
},
.size = sizeof(struct image_writer_opts),
.defaults = &image_writer_opts_defaults,
};
struct image_writer_ctx {
struct mp_log *log;
const struct image_writer_opts *opts;
const struct img_writer *writer;
struct mp_imgfmt_desc original_format;
};
struct img_writer {
const char *file_ext;
bool (*write)(struct image_writer_ctx *ctx, mp_image_t *image, FILE *fp);
const int *pixfmts;
int lavc_codec;
};
static bool write_lavc(struct image_writer_ctx *ctx, mp_image_t *image, FILE *fp)
{
bool success = 0;
AVFrame *pic = NULL;
AVPacket pkt = {0};
int got_output = 0;
av_init_packet(&pkt);
struct AVCodec *codec = avcodec_find_encoder(ctx->writer->lavc_codec);
AVCodecContext *avctx = NULL;
if (!codec)
goto print_open_fail;
avctx = avcodec_alloc_context3(codec);
if (!avctx)
goto print_open_fail;
avctx->time_base = AV_TIME_BASE_Q;
avctx->width = image->w;
avctx->height = image->h;
avctx->pix_fmt = imgfmt2pixfmt(image->imgfmt);
if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
MP_ERR(ctx, "Image format %s not supported by lavc.\n",
mp_imgfmt_to_name(image->imgfmt));
goto error_exit;
}
if (ctx->writer->lavc_codec == AV_CODEC_ID_PNG) {
avctx->compression_level = ctx->opts->png_compression;
avctx->prediction_method = ctx->opts->png_filter;
}
if (avcodec_open2(avctx, codec, NULL) < 0) {
print_open_fail:
MP_ERR(ctx, "Could not open libavcodec encoder for saving images\n");
goto error_exit;
}
pic = av_frame_alloc();
if (!pic)
goto error_exit;
for (int n = 0; n < 4; n++) {
pic->data[n] = image->planes[n];
pic->linesize[n] = image->stride[n];
}
pic->format = avctx->pix_fmt;
pic->width = avctx->width;
pic->height = avctx->height;
if (ctx->opts->tag_csp) {
pic->color_primaries = mp_csp_prim_to_avcol_pri(image->params.primaries);
pic->color_trc = mp_csp_trc_to_avcol_trc(image->params.gamma);
}
int ret = avcodec_encode_video2(avctx, &pkt, pic, &got_output);
if (ret < 0)
goto error_exit;
fwrite(pkt.data, pkt.size, 1, fp);
success = !!got_output;
error_exit:
if (avctx)
avcodec_close(avctx);
av_free(avctx);
av_frame_free(&pic);
av_free_packet(&pkt);
return success;
}
#if HAVE_JPEG
static void write_jpeg_error_exit(j_common_ptr cinfo)
{
// NOTE: do not write error message, too much effort to connect the libjpeg
// log callbacks with mplayer's log function mp_msp()
// Return control to the setjmp point
longjmp(*(jmp_buf*)cinfo->client_data, 1);
}
static bool write_jpeg(struct image_writer_ctx *ctx, mp_image_t *image, FILE *fp)
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
cinfo.err = jpeg_std_error(&jerr);
jerr.error_exit = write_jpeg_error_exit;
jmp_buf error_return_jmpbuf;
cinfo.client_data = &error_return_jmpbuf;
if (setjmp(cinfo.client_data)) {
jpeg_destroy_compress(&cinfo);
return false;
}
jpeg_create_compress(&cinfo);
jpeg_stdio_dest(&cinfo, fp);
cinfo.image_width = image->w;
cinfo.image_height = image->h;
cinfo.input_components = 3;
cinfo.in_color_space = JCS_RGB;
cinfo.write_JFIF_header = TRUE;
cinfo.JFIF_major_version = 1;
cinfo.JFIF_minor_version = 2;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, ctx->opts->jpeg_quality, 0);
cinfo.smoothing_factor = ctx->opts->jpeg_smooth;
if (ctx->opts->jpeg_source_chroma) {
cinfo.comp_info[0].h_samp_factor = 1 << ctx->original_format.chroma_xs;
cinfo.comp_info[0].v_samp_factor = 1 << ctx->original_format.chroma_ys;
}
jpeg_start_compress(&cinfo, TRUE);
while (cinfo.next_scanline < cinfo.image_height) {
JSAMPROW row_pointer[1];
row_pointer[0] = image->planes[0] +
cinfo.next_scanline * image->stride[0];
jpeg_write_scanlines(&cinfo, row_pointer,1);
}
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
return true;
}
#endif
static int get_encoder_format(struct AVCodec *codec, int srcfmt, bool highdepth)
{
const enum AVPixelFormat *pix_fmts = codec->pix_fmts;
int current = 0;
for (int n = 0; pix_fmts && pix_fmts[n] != AV_PIX_FMT_NONE; n++) {
int fmt = pixfmt2imgfmt(pix_fmts[n]);
if (!fmt)
continue;
// Ignore formats larger than 8 bit per pixel.
if (!highdepth && IMGFMT_RGB_DEPTH(fmt) > 32)
continue;
current = current ? mp_imgfmt_select_best(current, fmt, srcfmt) : fmt;
}
return current;
}
static int get_target_format(struct image_writer_ctx *ctx, int srcfmt)
{
if (!ctx->writer->lavc_codec)
goto unknown;
struct AVCodec *codec = avcodec_find_encoder(ctx->writer->lavc_codec);
if (!codec)
goto unknown;
int target = get_encoder_format(codec, srcfmt, ctx->opts->high_bit_depth);
if (!target)
target = get_encoder_format(codec, srcfmt, true);
if (!target)
goto unknown;
return target;
unknown:
return IMGFMT_RGB24;
}
static const struct img_writer img_writers[] = {
{ "png", write_lavc, .lavc_codec = AV_CODEC_ID_PNG },
{ "ppm", write_lavc, .lavc_codec = AV_CODEC_ID_PPM },
{ "pgm", write_lavc, .lavc_codec = AV_CODEC_ID_PGM },
{ "pgmyuv", write_lavc, .lavc_codec = AV_CODEC_ID_PGMYUV },
{ "tga", write_lavc, .lavc_codec = AV_CODEC_ID_TARGA },
#if HAVE_JPEG
{ "jpg", write_jpeg },
{ "jpeg", write_jpeg },
#endif
};
static const struct img_writer *get_writer(const struct image_writer_opts *opts)
{
const char *type = opts->format;
for (size_t n = 0; n < sizeof(img_writers) / sizeof(img_writers[0]); n++) {
const struct img_writer *writer = &img_writers[n];
if (type && strcmp(type, writer->file_ext) == 0)
return writer;
}
return &img_writers[0];
}
const char *image_writer_file_ext(const struct image_writer_opts *opts)
{
struct image_writer_opts defs = image_writer_opts_defaults;
if (!opts)
opts = &defs;
return get_writer(opts)->file_ext;
}
struct mp_image *convert_image(struct mp_image *image, int destfmt,
struct mp_log *log)
{
int d_w = image->params.d_w;
int d_h = image->params.d_h;
bool is_anamorphic = image->w != d_w || image->h != d_h;
// Caveat: no colorspace/levels conversion done if pixel formats equal
// it's unclear what colorspace/levels the target wants
if (image->imgfmt == destfmt && !is_anamorphic)
return mp_image_new_ref(image);
struct mp_image *dst = mp_image_alloc(destfmt, d_w, d_h);
if (!dst) {
mp_err(log, "Out of memory.\n");
return NULL;
}
mp_image_copy_attributes(dst, image);
if (mp_image_swscale(dst, image, mp_sws_hq_flags) < 0) {
mp_err(log, "Error when converting image.\n");
talloc_free(dst);
return NULL;
}
return dst;
}
bool write_image(struct mp_image *image, const struct image_writer_opts *opts,
const char *filename, struct mp_log *log)
{
struct image_writer_opts defs = image_writer_opts_defaults;
if (!opts)
opts = &defs;
const struct img_writer *writer = get_writer(opts);
struct image_writer_ctx ctx = { log, opts, writer, image->fmt };
int destfmt = get_target_format(&ctx, image->imgfmt);
struct mp_image *dst = convert_image(image, destfmt, log);
if (!dst)
return false;
FILE *fp = fopen(filename, "wb");
bool success = false;
if (fp == NULL) {
mp_err(log, "Error opening '%s' for writing!\n", filename);
} else {
success = writer->write(&ctx, dst, fp);
success = !fclose(fp) && success;
if (!success)
mp_err(log, "Error writing file '%s'!\n", filename);
}
talloc_free(dst);
return success;
}
void dump_png(struct mp_image *image, const char *filename, struct mp_log *log)
{
struct image_writer_opts opts = image_writer_opts_defaults;
opts.format = "png";
write_image(image, &opts, filename, log);
}