Browse code
lavfi: add internal functions for parsing format arguments
Signed-off-by: Stefano Sabatini <stefano.sabatini-lala@poste.it>
Mina Nagy Zaki authored on 2011/08/04 18:28:14Showing 2 changed files
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@@ -19,6 +19,7 @@ |
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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/eval.h" |
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#include "libavutil/pixdesc.h" |
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#include "libavutil/audioconvert.h" |
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#include "avfilter.h" |
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@@ -233,3 +234,61 @@ void avfilter_formats_changeref(AVFilterFormats **oldref, |
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} |
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} |
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+/* internal functions for parsing audio format arguments */ |
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+ |
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+int ff_parse_sample_format(int *ret, const char *arg, void *log_ctx) |
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+{
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+ char *tail; |
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+ int sfmt = av_get_sample_fmt(arg); |
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+ if (sfmt == AV_SAMPLE_FMT_NONE) {
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+ sfmt = strtol(arg, &tail, 0); |
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+ if (*tail || (unsigned)sfmt >= AV_SAMPLE_FMT_NB) {
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+ av_log(log_ctx, AV_LOG_ERROR, "Invalid sample format '%s'\n", arg); |
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+ return AVERROR(EINVAL); |
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+ } |
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+ } |
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+ *ret = sfmt; |
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+ return 0; |
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+} |
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+ |
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+int ff_parse_sample_rate(unsigned *ret, const char *arg, void *log_ctx) |
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+{
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+ char *tail; |
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+ double srate = av_strtod(arg, &tail); |
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+ if (*tail || srate < 1 || (int)srate != srate) {
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+ av_log(log_ctx, AV_LOG_ERROR, "Invalid sample rate '%s'\n", arg); |
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+ return AVERROR(EINVAL); |
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+ } |
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+ *ret = srate; |
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+ return 0; |
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+} |
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+ |
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+int ff_parse_channel_layout(int64_t *ret, const char *arg, void *log_ctx) |
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+{
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+ char *tail; |
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+ int64_t chlayout = av_get_channel_layout(arg); |
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+ if (chlayout == 0) {
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+ chlayout = strtol(arg, &tail, 10); |
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+ if (*tail || chlayout == 0) {
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+ av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", arg); |
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+ return AVERROR(EINVAL); |
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+ } |
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+ } |
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+ *ret = chlayout; |
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+ return 0; |
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+} |
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+ |
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+int ff_parse_packing_format(int *ret, const char *arg, void *log_ctx) |
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+{
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+ char *tail; |
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+ int planar = strtol(arg, &tail, 10); |
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+ if (*tail) {
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+ planar = (strcmp(arg, "packed") != 0); |
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+ } else if (planar != 0 && planar != 1) {
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+ av_log(log_ctx, AV_LOG_ERROR, "Invalid packing format '%s'\n", arg); |
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+ return AVERROR(EINVAL); |
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+ } |
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+ *ret = planar; |
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+ return 0; |
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+} |
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+ |
| ... | ... |
@@ -61,4 +61,46 @@ void ff_avfilter_default_free_buffer(AVFilterBuffer *buf); |
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/** Tell is a format is contained in the provided list terminated by -1. */ |
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int ff_fmt_is_in(int fmt, const int *fmts); |
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+/* Functions to parse audio format arguments */ |
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+ |
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+/** |
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+ * Parse a sample rate. |
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+ * |
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+ * @param ret unsigned integer pointer to where the value should be written |
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+ * @param arg string to parse |
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+ * @param log_ctx log context |
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+ * @return 0 in case of success, a negative AVERROR code on error |
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+ */ |
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+int ff_parse_sample_rate(unsigned *ret, const char *arg, void *log_ctx); |
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+ |
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+/** |
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+ * Parse a sample format name or a corresponding integer representation. |
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+ * |
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+ * @param ret integer pointer to where the value should be written |
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+ * @param arg string to parse |
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+ * @param log_ctx log context |
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+ * @return 0 in case of success, a negative AVERROR code on error |
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+ */ |
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+int ff_parse_sample_format(int *ret, const char *arg, void *log_ctx); |
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+ |
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+/** |
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+ * Parse a channel layout or a corresponding integer representation. |
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+ * |
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+ * @param ret 64bit integer pointer to where the value should be written. |
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+ * @param arg string to parse |
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+ * @param log_ctx log context |
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+ * @return 0 in case of success, a negative AVERROR code on error |
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+ */ |
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+int ff_parse_channel_layout(int64_t *ret, const char *arg, void *log_ctx); |
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+ |
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+/** |
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+ * Parse a packing format or a corresponding integer representation. |
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+ * |
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+ * @param ret integer pointer to where the value should be written |
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+ * @param arg string to parse |
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+ * @param log_ctx log context |
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+ * @return 0 in case of success, a negative AVERROR code on error |
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+ */ |
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+int ff_parse_packing_format(int *ret, const char *arg, void *log_ctx); |
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+ |
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#endif /* AVFILTER_INTERNAL_H */ |