mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
added new netpbm pam format support (needed for alpha plane support)
Originally committed as revision 1792 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Fabrice Bellard
parent
15e654b17b
commit
8975ba81f8
@ -73,6 +73,7 @@ void av_register_all(void)
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av_register_image_format(&pbm_image_format);
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av_register_image_format(&pgm_image_format);
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av_register_image_format(&ppm_image_format);
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av_register_image_format(&pam_image_format);
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av_register_image_format(&pgmyuv_image_format);
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av_register_image_format(&yuv_image_format);
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#ifdef CONFIG_ZLIB
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@ -253,6 +253,7 @@ extern AVImageFormat pnm_image_format;
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extern AVImageFormat pbm_image_format;
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extern AVImageFormat pgm_image_format;
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extern AVImageFormat ppm_image_format;
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extern AVImageFormat pam_image_format;
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extern AVImageFormat pgmyuv_image_format;
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extern AVImageFormat yuv_image_format;
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#ifdef CONFIG_ZLIB
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@ -219,6 +219,175 @@ static int pnm_write(ByteIOContext *pb, AVImageInfo *info)
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return 0;
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}
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static int pam_read(ByteIOContext *f,
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int (*alloc_cb)(void *opaque, AVImageInfo *info), void *opaque)
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{
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int i, n, linesize, h, w, depth, maxval;
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char buf1[32], tuple_type[32];
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unsigned char *ptr;
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AVImageInfo info1, *info = &info1;
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int ret;
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pnm_get(f, buf1, sizeof(buf1));
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if (strcmp(buf1, "P7") != 0)
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return AVERROR_INVALIDDATA;
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w = -1;
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h = -1;
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maxval = -1;
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depth = -1;
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tuple_type[0] = '\0';
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for(;;) {
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pnm_get(f, buf1, sizeof(buf1));
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if (!strcmp(buf1, "WIDTH")) {
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pnm_get(f, buf1, sizeof(buf1));
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w = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "HEIGHT")) {
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pnm_get(f, buf1, sizeof(buf1));
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h = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "DEPTH")) {
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pnm_get(f, buf1, sizeof(buf1));
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depth = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "MAXVAL")) {
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pnm_get(f, buf1, sizeof(buf1));
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maxval = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "TUPLETYPE")) {
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pnm_get(f, buf1, sizeof(buf1));
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pstrcpy(tuple_type, sizeof(tuple_type), buf1);
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} else if (!strcmp(buf1, "ENDHDR")) {
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break;
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} else {
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return AVERROR_INVALIDDATA;
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}
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}
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/* check that all tags are present */
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if (w <= 0 || h <= 0 || maxval <= 0 || depth <= 0 || tuple_type[0] == '\0')
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return AVERROR_INVALIDDATA;
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info->width = w;
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info->height = h;
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if (depth == 1) {
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if (maxval == 1)
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info->pix_fmt = PIX_FMT_MONOWHITE;
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else
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info->pix_fmt = PIX_FMT_GRAY8;
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} else if (depth == 3) {
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info->pix_fmt = PIX_FMT_RGB24;
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} else if (depth == 4) {
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info->pix_fmt = PIX_FMT_RGBA32;
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} else {
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return AVERROR_INVALIDDATA;
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}
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ret = alloc_cb(opaque, info);
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if (ret)
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return ret;
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switch(info->pix_fmt) {
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default:
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return AVERROR_INVALIDDATA;
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case PIX_FMT_RGB24:
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n = info->width * 3;
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goto do_read;
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case PIX_FMT_GRAY8:
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n = info->width;
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goto do_read;
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case PIX_FMT_MONOWHITE:
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n = (info->width + 7) >> 3;
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do_read:
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ptr = info->pict.data[0];
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linesize = info->pict.linesize[0];
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for(i = 0; i < info->height; i++) {
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get_buffer(f, ptr, n);
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ptr += linesize;
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}
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break;
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case PIX_FMT_RGBA32:
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ptr = info->pict.data[0];
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linesize = info->pict.linesize[0];
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for(i = 0; i < info->height; i++) {
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int j, r, g, b, a;
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for(j = 0;j < w; j++) {
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r = get_byte(f);
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g = get_byte(f);
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b = get_byte(f);
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a = get_byte(f);
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((uint32_t *)ptr)[j] = (a << 24) | (r << 16) | (g << 8) | b;
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}
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ptr += linesize;
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}
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break;
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}
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return 0;
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}
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static int pam_write(ByteIOContext *pb, AVImageInfo *info)
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{
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int i, h, w, n, linesize, depth, maxval;
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const char *tuple_type;
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char buf[100];
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uint8_t *ptr;
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h = info->height;
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w = info->width;
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switch(info->pix_fmt) {
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case PIX_FMT_MONOWHITE:
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n = (info->width + 7) >> 3;
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depth = 1;
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maxval = 1;
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tuple_type = "BLACKANDWHITE";
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break;
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case PIX_FMT_GRAY8:
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n = info->width;
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depth = 1;
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maxval = 255;
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tuple_type = "GRAYSCALE";
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break;
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case PIX_FMT_RGB24:
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n = info->width * 3;
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depth = 3;
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maxval = 255;
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tuple_type = "RGB";
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break;
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case PIX_FMT_RGBA32:
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n = info->width * 4;
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depth = 4;
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maxval = 255;
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tuple_type = "RGB_ALPHA";
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break;
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default:
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return AVERROR_INVALIDDATA;
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}
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snprintf(buf, sizeof(buf),
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"P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLETYPE %s\nENDHDR\n",
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w, h, depth, maxval, tuple_type);
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put_buffer(pb, buf, strlen(buf));
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ptr = info->pict.data[0];
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linesize = info->pict.linesize[0];
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if (info->pix_fmt == PIX_FMT_RGBA32) {
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int j;
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unsigned int v;
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for(i=0;i<h;i++) {
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for(j=0;j<w;j++) {
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v = ((uint32_t *)ptr)[j];
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put_byte(pb, (v >> 16) & 0xff);
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put_byte(pb, (v >> 8) & 0xff);
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put_byte(pb, (v) & 0xff);
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put_byte(pb, (v >> 24) & 0xff);
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}
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ptr += linesize;
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}
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} else {
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for(i=0;i<h;i++) {
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put_buffer(pb, ptr, n);
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ptr += linesize;
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}
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}
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put_flush_packet(pb);
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return 0;
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}
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static int pnm_probe(AVProbeData *pd)
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{
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const char *p = pd->buf;
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@ -239,6 +408,18 @@ static int pgmyuv_probe(AVProbeData *pd)
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return 0;
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}
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static int pam_probe(AVProbeData *pd)
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{
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const char *p = pd->buf;
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if (pd->buf_size >= 8 &&
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p[0] == 'P' &&
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p[1] == '7' &&
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p[2] == '\n')
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return AVPROBE_SCORE_MAX;
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else
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return 0;
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}
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AVImageFormat pnm_image_format = {
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"pnm",
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NULL,
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@ -275,6 +456,16 @@ AVImageFormat ppm_image_format = {
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pnm_write,
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};
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AVImageFormat pam_image_format = {
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"pam",
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"pam",
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pam_probe,
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pam_read,
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(1 << PIX_FMT_MONOWHITE) | (1 << PIX_FMT_GRAY8) | (1 << PIX_FMT_RGB24) |
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(1 << PIX_FMT_RGBA32),
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pam_write,
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};
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AVImageFormat pgmyuv_image_format = {
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"pgmyuv",
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NULL,
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